FPRDI TRADE BULLETIN SERIES NO. 7 ISSN 0117-4045

RELATIVE DENSITY OF PHILIPPINE WOODS

M A. Alipon, E. 0 . Bondad and P. C. Cayabyab

Puhllshed by: fi'OREST PRODUCTS RESEARCH AND DEVELOPMENT INSTITUTE DEPARTMENT OF SClENCE AND TECHNOLOGY COLLJ~:OE- LAOlJNA 4031 PHR,IPPJNTIS

RELAT-1¥E DENSITY OF RHlll.IPPINE 0 DS

RElA TIVE DENSITY OF PHILIPPINE WOODS

by

Marina A. Alipon, Elvina 0. Bondad and Pedro C. Cayabyab

SUMMARY

This bulletin presents the re/alive density IRDJ values from green to 15'.l,, /2'.l,, 5% and oven-dry moisture content conditions of 139 commercial, 82 lesser-known and 27 plantation timber species grown in the Philippines. The species are separated into five groups according lo their RD values and official common names in the Philippine wood market. The possible end-uses of !he species under each group were also given based on established p roperties use criteria as specified in !he Guidelines for Improved Utilization and Marketing of Tropical Wood Species IFORPRIDECOM 1980/. · ·

INTRODUCTION

Among wood quality indicators, relative density (RD) is perhaps the most extensively studied because it is easy to determine and has proven.Jo be a very useful index to many important wood uses.

RD is expressed as the ratio of the oven-dry weight of wood to its volume at current moisture content (MC). Wood shrir:tks and swells with the loss and gain of moisture below fiber saturation point (fspt, hence it is necessary to express RD at specified MC.

Even in the absence of actual test results, 1he RD of wood gives a good approximation of the latent strength of comparatively unknown species. The knowledge of density is useful in estimating many of the working properties of wood, such as charcoal and pulp yields, gluing, nail-holding and shrinkage characteristics. It also helps simplify timber selection and classification for marketing (ASEAN Technical Meeting on Forestry 1974).

RD has likewise been useful In estimating the biomass of trees and the weight of logs and lumber for loading and transport purposes. For instance, the approximate weight of wood at assumed or given MC can be calculated from the RD using the formula:

where:

Dm = S 0 + MC/100) 1000

Dm = net weight density in kg/m3

S = relative density at a given MC MC = moisture content

Sample calculation for Agoho (Casuorino equiselifolial.)

From Table 1, RD (column 6) = 0.832 MC (column 5) = 54.9%

Substituting in the formula:

Om = 0.83211+54.91100) 1000 = 1288.8 kg/m3

Therefore, a cubic meter of logs or _lumber with 54.9% MC will weigh approximately 1,290 kg. Denstty values for MC above fiber ~ration point ( = 30%) will be correct, but for MC below 30%, the computed vaJues will be loW. This is because the formula does not consider shrinkage and swelling from green to below 30% MC.

Similarly, several equations used in estimating 1ree biomass O<etterings et al. 2001, Foster-Brown et al. 1995, Nelson et al. 1999, Brawn and Lugo 1992l have always included wood density as a parameter.

The latest compilation of data on 1he RD of Philippine woods was published by Rocafort et al. in 1983. It covered 248 species represented by 826 trees. Since then, considerable data have been gathered, thus this bulletin is an expanded version of Rocafor'ts publication on 1he RD of Philippine woods.

REIATIVE DENSITY VALUES

Tobie 1 presents 1he RD of 248 Philippine wood species represented by 960 trees. The specimens in Column 1 ore separated into five groups according to their RD values. These are as follows: high (0.701 and above); moderately high (0 .. 601-0.700); medium (0.501 - 0600); moderately low (0.401 - 0.5001 and low (0.400 and below).

The species are also presented according to their official common names and scientific names, and whether they are commercial, lesser-known and plantation. The number of trees sampled and the number of specimens tested ore given under Columns 3 and 4, respectively. The green MC and the basic RD (Columns 5 and 6) are the averages of 1ree means and ore considered the species means for localities where five or more 1ree hove been collected. The RD values at four levels of MC below tsp under Columns 7 to 10 derived using the Maclean formula (Maclean 1955) for finding the RD of wood below fsp.

RD values for species represented by 5 or more trees from a single locality may be considered the species mean and may be applicable to the species only when cut from the some forest regions where they have been collected. In general, fhe best estimate of a species' properties in many locations is fhe species mean, which represents all the areas sampled within the species' natural range. The RD values of Philippine wood species with at least five or

more sample trees may give a better approximation of the tree means than those species less represented.

The RD groups and corresponding possible wood end-used are as follows:

RD Group Possible End-Uses

I. High For heavy duty construction where bo1h strength and durability are required; also for ship-buildin~. railway slippers, paving blocks, tool handles, friction· and bearing blocks, pulley sheaYes and rollers, bridge and wharf timbers, posts, beams, girders, trusses, door and window sills, bolustrades, ftooring and stairs, salt and ftesh water plies, and telecommunicatton poles.

U. Moderotely For house and building construction such as posts, beams, trusses, studs, High

/ door panels and flooring; also for automobile and truck bodies, veneer and plywood, bobbins. spindles, bowrmg pins, bridge and wharf timber piles and other uses requiring hard and strong wood.

Ill. Medium I For high-grade fumiture and cabinets such as radio and phonograph cabinets; also, for paneling, automobile bodies and interior trim of boats,

, bodies of musical instruments, mouldings and other ornamentals.

IV. Moderately l ow For the production of pulp and paper as wen as of toys, venetian blinds and veneer; also for medium grade furniture and cabinets, millworks, pi~re frames paneling, mousling, flooring, sidings, doors, windos sash.

V. Low For the production of pulp and paper, toys, pencil slats, match sticks,

/ loo1hpicks, ice-cream spoons, Popsicle sticks, venetian blinds, core veneer, wooden shoes. cigar boxes.

\

Ii y I

l

CONCLUSION

The RD values presented in this bulletin provide the industry, researchers, academe, as well as 1he public, with simple technical information that will help them approximate the strength of comparatively unknown Philippine wood species, estimate wood working properties, charcoal and pulp-yield weighf~r density and tree biomass.

REFERENCES

ASEAN Technical Meeting on Forestry. 1974. Kuala Lumpur, Malaysia, ASEAN 74PCFA/KL Tech. MR Report No. l. .

AUPON, M.A., F.B. TAMOLANG, J.E. ROCAFORT and Z.L. CABRAL. 1987. Nin1h Progress Report on the Relative Density of Philippine Woods. FPRDI Library, College, Laguna.

BROWNS. AND A.E. LUGO. 1992. Aboveground Biomass Estimates for Tropical Moist Forest of the Brazilian Amazon. lnterciencio 17:-8-18.

FOSTER-BROWN, LA. MARTINEUJ, W.W. lHOMAS, MZ. MOREIRA, CA.C. FERREIRA AND R.A. VICTORIA. 1995. Uncertainty in the Biomass of Amazonia Forest: An Example from Rondonio, Brazil. Forest Ecology and Management 75:175-179.

FOREST PRODUCTS RESEARCH AND INDUSTRIES DEVELOPMENT COMMISSION (FORPRIOECOM). 1980. Guidelines for the Improved Utilization and Marketing· of Tropical Wood Species. · FPRDI, College, Laguna. Prepared for Food and Agricultural Organization of the United Nations, Contact No. RD/HQ 1973-5/FO. .

-----=-- · 1961. Technical Note Number 16. FPRDI, College, Laguna.

KETTERINGS, O.M., R.COE, V. NOORDWUK, M. AMBAGAN AND CA.PAlM. 2001. Reducing Uncertain1y in 1he Use of Allometrlc Biomass Equations for Predicting Above-Ground Tree Biomass in Mixed Secondary Forests. Forest Ecology and Management. 145: 199-209.

MACLEAN, J.D. 1955. Effect of Temperature Changes on the Shrinkage, swelling, . Specific Gravity, Air Void Space, Weight, and Sill'.lilar Properties of Wood. Forest Service. Forest Products Laoorafory Report No. 1448.

NELSON, B.W., R. MESQUITA, J.LG. PEREIRA, S.G. AQUINO DE SOUZA, G.T. BATISTA AND L.B. COUTO. 1999. Allometric Regressions for Improved Estimate of Secondary Forest Biomass in the Central Amazon. Forest Ecology and Management. 117: 149-167.

PANSHIN, A.J. AND DE ZEEW. 1990. TexfbookofWoodTechnologyVol.1, 3rd·ed. McGraw Hill Book. Co .• New York.

ROCAFORT, J.E., AND Z.L. CABRAL. 1983. Jfn Progress eport on the Relative Density of Philippine woods. FPRDI Library. Cortege, Laguna 4030. .

Table l . Relative density values and corresponding grouping of some Philippine woods.

Increase in Number Number MC At MC At RD for Every

RelatlVe Density Group/Species of of at test Indicated Oven-dry 1% Decrease (Common & botanical name) Locally of Growth Trees Specimens (Green Under Condition In MC Below

Sam led Tested Condllk>n) Column 5 30% 1 8 1

I. High Relative Density: !Values from 0.700 and above)

A. C~mmercial Species

Agoho (Casuorina equisetifol/a LI Makiling, Laguna l 30 54.1 0861 0.974 1.001 l.07 1.122 0.0094 lnfanta, Quezon 4 74 55.7 0.820 0.922 0.946 l.01 1.053 0.0084 Maslnloc, Zambales 2 68 53.6 0.842 0 .950 0.925 l.04 1.090 0.0089

Species Average 54.5 0.841 0.949 0.957 l.04 1.088 0.008~

Alupag-amo !Litchi chinensis Sonn. spp. Llavac, Quezon 1 41 49.l 0.886 0.981 l.007 1.08 1.130 0.0086 philippinensis IRodlk.l Leenh.J Masinloc, Zambales 1 54 49.3 0.872 0.988 1.015 l.09 1.141 0.0097

Species Average 49.2 0.879 0.985 1.011 1.08 1.136 0.0092

Bayanti (Aglaia llanosiana C.DC.I Maklllng, Laguna 11 43.0 0.892 1.014 1.043 1.12 1.175 0.0102

Bingos !Termina/ia cilrina (Gaertn.) Sibul, Bulacan l 77 65.2 0.743 0.826 0.845 0.89 0.929 0.0066 Roxb. ex Flem.I Panabo, Davao del Norte l 58 87.1 0.576 0.625 0.635 0.66 0.682 0.0032

lnfanta, Quezon 4 259 66.4 0.734 0.815 0.883 0.88 0.915 0.0064 Species Average 72.9 0.684 0.755 0.788 0.81 0.842 0.0054

Bolong-eta (Diospyros ph17osanlhera lnfanta, Quezon 42 55.5 0.802 0.899 0.922 0.98 l.024 0.0080 (Blanco) var. philosanlheral Acoje, Zarnbales 31 58.4 0.803 0.901 0.923 0.98 1.025 0.0079

Species Average 57.0 0.803 0.900 0.923 0.98 1.025 0.0080

l 2 3 4 5 6 7 8 9 10 ll

Dungon (Herifiera sy/valica VldaQ Sibul, Bulacan l 38 61.8 0.778 0.869 0.890 0.94 0.985 0.0074 Tonay, Rizal l 37 65.0 0.761 0.848 0.868 0.92 0 .958 0 .0070

Species Average 63.4 0 .770 0.859 0 .879 0.93 0.972 0.0072

Kamagong IDiospyros discolor Willd.) Famy, Laguna l 76 61.2 0.810 0.909 0.932 0.99 l.037 0 .0082 lnfonta,Quezon --......_ I ~ 3 104 ...... 57.0 0.612 0.912 0.935 0.99 l.049 0.0082

SpecieS Average 59.l 0 .711 0.911 0.934 0.99 1.043 0.0082

Kamagong, ponce IDiospyros poncei Famy, Laguna 1 25 54.1 0.818 0.920 0.943 100 0.050 0.0083 Merr.) lnfanla.Guezon 3 I 123 58.6 0.808 0.907 0.930 0.99 l.033 0.0081 Species Average 56.4 0.813 ' 0.914 0.937 1.00 0.542 0 .0082 . -

Kafilma IDiospyros ni!ida Merr.) Famy, Loguoo I 3 158 69.6 0.102 0.775 0.792 0.83 0.866 0.0059 lnlanto,OUezon 2 98 63.5 0.710 0.785 0.802 0.85 0.878 0.0060

Species Average 66.6 0.706 0 .780 0.797 0.84 0.872 0.0060

Makaasim /Syzygium nilid1.111 Benlh.J Uavac, Quezon 1 ~ 27 58.5 0.778 0.807 0.825 0.87 0.906 0.0064 ~n Clemente, Tarlac l 26 - 63.7 0.740 0.822 0 .841 0.89 0.925 0.0066 Masinloc, Zambales 1 ' ' 40

... 64.6 0.747 0.834 0 .850 1.00 0.986 0.0067

Acoje, Santa Cruz. Zambales 3 ~

60 57.9 0.753 0.838 0.858 0.91 0.945 • 0,0069 Species Average 61.2 0.755 0.825 0 .844 0 .92 0.941 0.0067

' i Malabayat:x:Js I Tris/aniopsis decorfiCata lnfanta, Quezon 8 303 44.5 0.910 1.037 1.067 1.14 1.006 0.0107

MerrJWlls. & Waterh.J -

Malakatmon !Dillenia luzoniensis (Vid.l Slbul Bulacan 2 101 77!1. 0.675 0.743• 0.758 0.8 0.825 0.0053 Maslnloc, Zambales 3 1 105 78.1 0.691 0.762 O.T/8 0.82 0.849 0.0056 IAcoje, Zambales 2 71 57.5 0.754 0.840 0 .859 0.91 0.947: 0.0069

Species Average 70.9 . 0.707 0 .782 0.798 0.84 0.874 0.0059 ,,.

Mangkono txanthostemon Dinagat, Surlgao del Norte 1 15 31.2 1.043 1.214 1255 1.36 l.452 0.0149 verdugonianus Naves) I

I

Molave (Vi/ex parvifl<Jra Juss.) Makiling, Laguna 6 189 752. 0.692 0.763 0.779 0.82 . 0.851 0.0057 Masinloc, Zambales 1 36 59.5 0.779 0 .871 0.892 0 .95 0.986 0.0074

Species Average 67.4 0.736 0.817 0 .836 0.88 0.919 0.0066 -

2 3 4 5 6 7 8 9 10 11

Narlg, thlck-leofed l Vatica pacl7yp/Jylla lnfanfa, Quezon l 4 53.2 0.762 0.849 0.869 0.92 0.959 0.0071 . Merr.) Tagkawayan,. Quezon 5 24 572 0.779 0.871 0.892 0.95 0.986 0.0074

Species Average 55.2 0.771 0.860 0.881 0.93 0.973 0.0073

Sasallt I Teqsmanniodendron Acoje, Zambales 2 46 38.l 0.928 1.061 1.092 l.17 1.239 0.0112. ahernianum Merr.J Bakh.J Infante, Quezon 4 77 34.8 0.948 1.087 l.130 l.21 1.274 0.0118

Maslnloc, Zambales 4 I 133 48.3 0.855 0.967 0.992 l.06 1.112 0.0092 Species Average 40.4 0.910 1.038 1.071 1.15 1.208 0.0107

Supa 15indora supa Merr.) Makillng, Laguna 1 58 69.7 0.736 0.817 0.836 0.88 0.919 0.0065 . Tiga ITrislaniopsis micron/ha Merr.I Bisllg, Surlgao del Sur 1 Ii 33 45.3 0.889 1.005 l.033 1.31 1.163 0.0100

Wlls. & Waterh.J

Yakal (5horea astyloso Foxw.J lnfanta, Quezon 1/ 29 58.4 0.730 0.810. 0.828 0.67 0.909 0.0063 .....

Yakal-mabolo (Shorea clliola KlngJ Sipuloy, Negros Occ. ,_, 1 11 65.9 0.747 0.831 0.850 0.99 0.936 0.0067

Yakal malibato IShorea mallbalo Foxv.1.1 Pagbilao, Quezon 2 112 59.5 0.778 0.869 0.890 0.94 0.985 0.0079

Yakal-saplungan !Horea plagata Slbul, Bulacan 5 209 45.8 0.870 0.986 l.013 l.08 1.137 0.0096 (Blanco) Vldah Capas, Tarlac l 12 41.4 0.910 1.037 1.067 1.14 1.206 0.0107 Species Average 43.6 0.890 1.012 1.040 1.11 1.172. 0.0102

~ 1 ~

Yakal-yamban (Shorea conlorta Vidal Tungao, Agusan del Norte 1 54 5'1.5 0.760 0.847 0.867 0.92 0.956 0.0070 ssp. fa/ciferoides) Asuncion. Davao del Norte 5 609 66.3 0.706 0.780 0.797 0.84 0.872 0.0059

Panabo, Davao del Norte 1 ' 60 5'1.1 0.755 0.841 0.860 0.91 0.948 0.0069 lnfanta, Quezon 9 50 59.2 0.794 0.889 0.911 0.97 0.011 0.0078 Bislig, Surigao del SUr l 29 ... 62.5 0.770 0.859 0.880 0.93 0.972. 0.0072 Lanuza, Surigao def Sur 2 58 54.2 0.825 0.92.8 0.952 1.01 1.061 0.0085

Species Average 59.5 0.768 0.857 0.878 0.93 0.803 0.0072

8. lesser-Known Species •

Amudll !Streb/us glober Merr.J lnfanta, Quezon l 8 59.9 0.771 0.861 0.881 0.93 0.974 0.0072 Corner var. g/aberl

1 2 3 4 5 . 6 7· 8 9 10 11

Arongen JGanophytlum talcatum Blume) Tungao, Agusan del Norte 1 40 49.6 0.806 0.904 0.927 0.98 l.030 0.0080

Ayangm lA(acia con!Usa Merr.I Makiling, Laguna 1 22 63.9 0.747 0.831 0.850 0.90 0.936 0.0067

Ballkbikan !Drypeles longifo/ia (Blume) Famy, Laguna l 24 70.1 0.756 0.842 0.862 0.91 0.950 0.0069 Pax & K. Hoffrn.J . Makiling, Laguna 2 25

,. 59.8 0.751 0.836 0.855 0.90 0.942 0:0068

Real, Quezon 1 34 65.4 0.721 ' 0.799 . 0.816 0.86 0.895 0.0062 Species Average ' 65.l 0.743 0.826 0.844 0.89 0.929 0.0066

11 Bonsilal IBrockenridgea paluslris Bartell.I Mati, Davao 1 50 44.7 0.860 0.973 0.999 1.07 1.120 0.0093

1) ~

Cana-fistula (Cassk1 fistula L.) Makiling, Laguna 6 75.0 0.709 0.764 0.801 0.84 o.an 0.0060

uusln 1Maronthes c01ymbosa Blume! Makiling, Laguna 2 i 65 58.8 0.738 0.820 0.838 0.89 0.922 0.0007 Poteng, Tarloc 1 57 53.9 O.TlO 0.859 0.880 0.93 0.972 0.0072 Acole, Maslnloc, Zarnbales 4 ' 140 58.1 0.781 0.873 0.894 0.95 0.990 0.0075

Species Average ' .... 56.9 0.763 0.851 0.871 O.~ 0.961 0.0051

r--...1, '" Tamayuan !Strombosia phillppinensis Makiling, Laguna 2 9

,.,.. 61.6 0.714 0.790 0.807 0.85 0.885 0.0061

(Baill.J Rolfe]

Tara-tara (Oysoxytµm cumingionum C.DC.I Makiling. Laguna l

I ~ 7 63.7 0.729 0.809 0.827 0.87 0.908 0.0063

c. Plantation .species 1~ ................

Safil"Mlood (Chloroxy/on swiefenta DC.I Makillng, Laguna l 21 45.6 0.758 0.845 0.865 0.92 0.955 0.0070

II. Moderately High Relative Denslly

"' (Values ranging from 0 .600 to 0.699) ,..___ A. Commercial Species - -

Acle JAJb/Zkl acle (Blanco) Merr.J .

Masinloc, Zambales 1 43 106.5 0.573 0.621 0.632 0.66 0.678 0.0037 Makiling, Laguna 2 73 84.3 0.639 0.699 0.713 . 0.75 o.n2 0.0047

Species Averaqe 95.4 0.606 0.660 0.673 0.70 0.725 0.0042

l 2 3 4 5 6 7 8 9 10. 11

Akleng-parang IAlbiZ/a procera (Roxb.I Makillng, Laguna l 6 97.5 0.591 0.642 0.654 0.68 0.703 0.0040 BenthJ Acoje, Zarnbales 2 62 92.3 0.637 0.725 0.739 0.78 0.803 0.0050

Species Average 94.9 0.614 0.684 0.697 0.73 0.753 0.0045 ......

Arnugis !Koordersiodendron pinna/um Panabo, Davao del Norte l 49 72.l 0.684 0.754 0.769 0.81 0.889 0.0054 (!31anco) Merr.J Makiling. Laguna 2 44 86.2 0.639 0.699 0.713 0.75 0.772 0.0047

Species Avecage 79.2 0.662 0.727 0.741 0.78 0.831 0.0051 Anang:-gulod [Diospyros myrmecocalyx Famy, Laguna 3 181 74.5 0.691 0.762 0.778 0.82 0.849 0.0056

(Hlern) Bakh.J lnfanta, Quezon 2 25 73.4 0.662 0.727 0.742 0.78 0.806 0.0051 Species Average

' 74.0 0.677 0.745 0.760 0.80 o.8Z8 0.0054

1. \

Apltong (Dlplerocarpus grandiDorus Lal-lo Cagayan 1 j 3 67.0 0.673 0.740 0.755 0.79 0.822 0.0053 Blanco) Famy, Laguna 1 24 76.l 0.663 0.728 0.743 0.78 0.808 0.0051

Quezon, Palowan 3 160 96.9 0.572 0.620 0.630 0.66 0.676 0.0036 Taytay, Palawan 6 35 80.7 0.6'.lJ 0.686 0.699 0.73 0.757 0.0046 lnfanta, Quezon 6 364 87.8 0.608 0.602 0.674 0.70 0.727 0.0042 Llavac, Quezon 1 45 81.9 0.616 0.672 0.684 ').72 0.739 0.0043 Tagkawayan, Quezon 5 78 83.8 0.599 0.652 0.663 0.69 0.715 0.0040 Masinloc, Zambales 5 252 78.1 0.654 0.717 0.732 0.77 0.794 0.0050

Species Average 81.5 0.627 0.677 0.698 0.73 0.755 0.0045 I

Ato-ata IDiospyros midanaensis Merr.J lnfanta. Quezon 1 119 64.7 0.691 0.762 0 .778 0.82 . 0.849 0.0056

\~ c (I.. Balitbiton (Cynomelra ramlDora L. var. Maklllng, Laguna l

11\ 5 75.2 0.6'17 0]69 0.786 . 0,83 . 0.859 0.0058

.ramlf{oral

Belobo {D!plodiscus paniculalu$ Turcz.) · _Mokiling, Laguna 1 4 81.0 0.632 0.691 0.704 0.74 0.762 O.Q0.46. .

Batino 'A/stonia mocropnylla G. Don) Magpet, Cotabofo del Norte 1 58 76.0 0.640 0.701 0.714 0.75 . 0.774 0.0047 Makiling, Laguna 2 49 100.0 0.605 . 0.659 0.671 0.70 0.723 0.0041-

Species Average 88.0 0.623 0.680 0.693 0.72 0.749 0.0044 -.. -

Bolon lPlalymilra aroorea IBl_anco) Kesler). Maklllnci, Lagunq 3 70 64.3 0.691 0.762 0.778 0.82- 0.849. 0.0056

l 2 · 3 4 5 6 7 8 9 10 ll .

Dalingdingan IHopea foxworthyi Elmer) Famy, Laguna 2 87 74.2 0.622 0.679 0 .692 0.72 0.748 0.0044 PangiL Laguna 1 6 69.3 0.667 0.733 0.748 0.79 0.814 0.0052 Uavac, Quezon .1 67 61.l 0.656 0.720 0.734 0.77 0.797 0.0050

. Species Average - 6C.2. 0.648 0.711 0.725 0.76 0.786 0.0049

Duktulan 15yzygium /uzonense W\err.) Merr.J Makillng, Laguna 2 44 83.l 0.630 0.689 0.702 0.73 t>.759 0.0045

Guljo [Shoreaguiso (Blancol BlumeJ Butuan. Agusan del Norte 1 I 48 70.4 0.686 0.756 0.772 0.81 0.842 0.0055 Sibu~ Bulacan 1 49 74.l 0.646 0.708 0.722 0.76 0.782 0.0048 Asuncion, Davao del Norte 2 111 86.2 0.612 0.667 0.679 0.71 0.733 0.0043 Famy. Laguna 3

. 263 75.0 0.703 o.m 0.793 0.84 0.868 0.0058

Maklling, Laguna l I

47 66.8 0.674 ' 0.741 0.757 0.79 0.824 0.0053 Infante, Quezon 1 59 73.8 0.707 0.782 0.798 0.84 0.874 0.0059

GUii<> 15110rea guiso IBlancol Blume) Butuan, Agusan del Norte . 1 48 70.4 0.686 0.756 0.772 0.81 0.842 0.0055 Sibul, Bulacan .. 1 49 ..... 74.l 0.646 0.708 0.722 0.76 0.782 0.0048 Asuncion, Davao del Norte 2 111 86.2 0.612 0.667 0.679 0.71 0.733 0.0043 Famy. Laguna

~

3 263 ,

0.703 o.m 0.793 0.84 75.0 0.868 0,0058 Makillng, Laguna l 47 66.8 0.674 . 0.741 0.757 0.79 0.824 0.0053

/

lnfanta, Quezon 1 59 73.8 0.707 0.782 0]98 0.84 0.874 0.0059 Pagbilao, Quezon l 18 63.3 0.747 0.831 0.850 0.90 0.936 0.0067 Pafling. Tarlac 1 34 76.7 0.669 0.735 0.750 0.79 0.816 0.0053 San Clemente, Tarlac 1 73 63.7 0.723 o".801 0.819 0.86 0.898 0.0062 Maslnloc. Zambales ~~ 1 11 71 - 84.1 0.646 0.708 0.722 0.76 0.782 0.0048

Species Average 73.4 0.679 0.748 0.764 0.80 0.833 0.0054

lpil l/nlsio bijuga (Colebr.l O. Kuntze.I Maklllng, Laguna 5 212 93.4 0.681 0.75P 0.766 0.80 0.835 0.0055

Kamatog !Sympelalandra densifloro Sibul, Bulacan 2 142 .. 81.6 0.669 0.735 0.750 0.79 0.816 0.0053 IEfmen v. Steen] Fomy, Laguna 1 79 75.0 0.694 0.766 0.782 0.82 0.854 0.0056

Inf onto, Quezon 5 140 87.0 0.643 0.704 0.718 0.75 0.778 0.005 Tagkawayan, Quezon 4 33 89.2 0.642 0.703 0.717 0.75 o.m 0.0047 Real, Llovac, Quezon l 67 88.2 0.650 0.713 0.727 0.76 0.788 0.0048

Species Average 84.2 0.660 0.724 0.739 0.78 0.803 0.0051

l 2 J 4 5 6 7 8 9 10 ll

Katmon (Di/lenia philippinensis Rolfe) Makiling, Laguna l 7 108.3 0.566 0.613 0.623 0.65 0.668 0.0036 lnfanta, Quezon l 34 84.5 0.653 O.il6 0.730 0.77 0.793 0.0049 Real, Llavac, Quezon l 57 80.9 0.586 0.636 0.647 0.68 0.696 0.0039

Species Average 91.2 0.602 0.655 0.667 0.70 0.719 0.0041

Katmon-bayani IDillenio megalant11a Merr.J lnfanta, Quezon ........... 1. 2 61 ....

75!1. 0.689 0.760 0.776 0.82 0.846 0.0055

Kato IAg/aiO cucu/lata (Roxb.J Pellegr.J lnfanta, Quezon 1 31 103.7 0.564 0.634 0.645 0.67 0.693 0.0058 Real, Quezon 1 20 83.2 0.652 0.715 0.729 0 .76 0.791 0.0049 Acoje, Zamboles 2 I 57 64.2 0.676 0.744 0.759 0.8 0.827 0.0053

Species Average 83.7 0.637 0.698 0.711 0.74 0.770 0.0053 -

Lomarau/Apitong-babul (Swinton/a Quezon, Palawan 2 131 82.8 0.648 0.710 0.724 0.76 0.785 0.0049 foxworlhyi Elmer) Llavac, Quezon l 40 95!1. 0.602 0.655 0.667 0.70 0.719 0.0041

lnfanta, Quezon 2 I

47 93.7 0.596 0.648 0 .660 0.69 0.710 0.0040 Species Average 90.6 0.615 0.671 0.684 0.71 0.738 0.0043

Ludek !Ludekia bemardol UV\err.J Rldsd.J Makiling, Laguna k l- l 34 90.2 0.624 0.681 0 .694 0.73 0.750 0.0045 .. 1 ~

Malagu110 1s11orea plaga1<1 Foxw.J Sibul, Bulacan l ' 30 62.5 0.698 o.m 0.787 0.83 0.860 0.0057

• Malaruhat (Cleistocalyx opetculatus (Roxb.) lnfanta Quezon 2 82 76.8 0.664 0.729 0.744 0.78 0.809 0.0052 Merr. & Perry)

· ~ -Malasaging IAglaia edu/is (Roxb.J Wall.I Maklllng, Laguna l I

23 74.0 0.699 0.772 0.788 0.83 0.862 0.0057

Manaring llilhocorpus soler/anus lnfanta, Quezon l 21 81.0 0.630 0.689 0.702 0.73 . 0.759 0.0045 (VidaO Rehd.J

Manggachapui IHopeo acuminoto Merr.) Famy, Laguna l 128 ..

82.? 0.626 0.684 0.697 0.73 0.153 0.0045 lnfanta, Quezon 2 94 73.l 0.637 0.697 0.710 0.74 0.769 0~0047 Llvac, Quezon 1 31 78.4 0.619 0.675 0 .688 0.72 0.743 0.0044 Tagkawayan, Quezon l 10 70.0 0.656 0.720 0.734 0.77 0.797 0.0050 Masinloc, Zamboles 2 70 79.8 0.578 0.627 0.638 0.66 0.685 0.0037

Species AveroQe 76.8 0.623 0 .681 0.693 0.73 0.749 0.0045

1 2 3 4 5 6 7 8 9 10 II

Manggis IKoomposia excelsa [Becc.J Taub.I Quezon, Palawan · 2 131 80.9 0 .634 0 .693 0.707 0.74 0.765 0 .0046

Margapall [Dehaositi incrossato tJackl lnfanta Quezon 1 14 71.4 0 .643 0.704 0.718 0.75 0.778 0 .0048 Kosterm.I

Mlau (Dysaxylum alliaceum Blume) Famy, Laguna 2 240 ~

76.7 0 .609 0.664 0.676 0.71 0.729 0.0042 Llavac, Quezon l 37 76.4 0.627 0 .685 0.698 0.73 0.755 0.0045 Pagdanan. Palawan 2 99 100.1 0.573 0 .62.l 0.632 0.66 0.678 0 .0037 Makiling, Laguna l 20 78.1 0 .665 0 .731 0.745 0.78 0 .811 0 .0051

Species Average 82.8 0.619 0 .675 0.688 0.72 0.743 0.0044

Narlg I Vat/co mangocnapoi Blanco Sibul, bulacan 1 39 - 67.3 0.712 0.788 0.805 0.85 0.881 0.0060 ssp. mangac/JapO!l Famy, Laguna 4 167 87.1 0.613 0 .668 0.681 0.71 0 .733 0.0043

Quezon, Palawan 1 47 68.7 0.730 0 .810 0.828 0.87 0.909 0 ,0063 Llavac, Quezon 2 86 84.0 0.634 0 .693 0.706 0.74 0 .765 0 .0023 lnfanta, Quezon 1 88 84.5 0 .629 0.687 0.700 0.73 0.758 0.0046 Maslnloc, Zambales 1 64 73.2 0.631 0.690 0.703 0.74 0 .761 0 .0045

Species Average 77.5 0.658 0.703 0,717 0.75 0.778 0.0043

Panau IDipterocarpus grocills Blume) Butuan, Aguson del Norte I 1 66 81.3 0.600 0.653 0.665 0.69 0.716 0.0041 Tungao, Agusan del Sur 1 57 89.7 0 .585 0 .635 0.646 0.67 0.695 0.0039 Sibul, Bulacan 1 6 69.5 0 .656 0.720 0.734 0.77 0.797 0.0050 Famy, Laguna 3 278 84.9 0.619 0 .675 0.688 0 .72 0.743 0.0044 lnfanto, Quezon 4 196 78.3 0.623 I 0.680 0.693 0.73 0.749 0.0045 Lanuza, SUrlg<JO del Sur - •

0.67 4 160 82.8 0.582 I o .632 0.642 0.69-l 0 .0038 Capas, Tarlac l 23 77.0 0.564 I 0.610 0.621 0 .65 0.665 0.0036 San Clemente, Tarlac 3 170 80.8 0.610 0 .665 0.677 o.n 0.730 0.0042

Species Average 80.5 0.605 0 .659 0.67i 0 .70 0.723 0 .0042

Panau, tailed-leat (Dipterocarpus caudalus Tagkawayan, Quezon __., .... 1 8 64.1 0.610 0.665 0.677 0.71 0 .730 0.0042 caUdatus Foxw. ssp. caudatusl

B. lesser-Known Species I

Anoniog [Horsfleldia iryo (Gaertn.) Warb.J Real, Llavac, Quezon 1 65 74.7 0.648 0.710 0.724 0.76 0 .785 0 .0049

Antsoan (Cassia {avanica L: ssp. iavanica) Makiling, Laguna 2 69 79.4 0.685 0 .755 o.m 0.61 0.840 0.0055

~ 1 2 3 4 5 6 7 8 9 10 11

Bonato !Mallo/us pflilippensis !Lam.I Makiling, Laguna 1 4 72.9 0.635 I 0.766 0.0046 0.6951 0.708 • 0.74 Muell-Arg.J

Bokbok (Xonlhophyllum ffavescens Roxb.J I

Famy, Laguna 5 176 93.6 0:632 0.691 I 0.704 0.74 0.762 0.0046 Masinloc, Zamboles l 58 89.4 0.613 0.668 0.681 0.71 0.735 0.0043 Aco1e, Zambales 2 93 105.9 0.575 0.624 0.635 0.66 0.682 0.0037

Species Average 91.5 0.607 0.661 0.673 0.70 0.726 0.0042

. Gatasan [6arcinia veno/usa IBlancol ChoisyJ Acoje, Sta Cruz. Zambales 5 68 80.7 0.672 0.740 0.754 0.79 0.821 0.0052

Langll IAltJiZia /etJbeck IL.I Benfh.J Makiling, Laguna 1 29 87.1 0.658 0.722 0.737 0.77 0.800 0.005

Malatapal Vilangium long!Uorum Merr.J Makiling, Laguna 1 23 88.3 0.648 a.no I 0.724 0.76 0.785 0 .0049 -

0.690 I o.703 Parukapok tSycopsis dunni Hemsl.J lnfanta, Quezon 1 ' 6 73.5 0.631 0.74 0.761 0.0045

IMakillng, Laguna 1.1

Putian wangium iOVGnicum !Blume) 2 ~ 3 88.0 0.631 0.690 0.703 0.76 0.761 0.0045

Wang. var. iaheri Bloem.I Real, Uavac, Quezon - l 42 71.8 0.663 0.728 0.743 0.78 0.808 0.0051 Species Average 79.9 0.647 0.709 I 0.723 0.77 0.785 0.0048

Siar !Peltop/10rum pterocarpum lDC.l Makillng, Laguna l 41 91.8 0.616 O.o73 0.686 0.72 0.741 0.0044 K Heyne]

Talngang-babul (Gonocaryum col/eryanum Makiling, Laguna 4 73 84.0 0.639 0.699 0.713 0.75 o:n2 0.0047 (Baill.) Becc.J

L~ -Tu!ibas-tilos !Micromeluln compressum Makiling, Laguna l I/ 9 63.0 0.642 0.703 0.717 0.75 o.m 0.0047

(Blanco) Merr.J I Uas [Harpullia arborea (Blanco) Radlk.J Makiling, Laguna l 4 ..... 74.9 0 .623 0.680 0.693 0.73 0.749 0.0045

C. Plantation Sp.ecies

Giant lpil-ipil fleucaena pulverulenta Makiling, Laguna l 34 78.5 0.728 0,807 0.825 0.87 0.906 0.0064 (Schldl.) Benth.I Canlubang, Laguna 2 29 93.4 0.544 0.587 0.597 0.62 0.638 0.0033

Species Average 86.0 0.636 0.697 0.711 0.75 . 0.772 0.0049

1 2 3 4 5 6 7 1f 9 10 11

Ill. Medium Relattve Density (Values ranging from 0.500 to 0 .599)

A. Commercial Species --.. _,.

Anang- (D/ospyros pyrrhocatpa Mlq.I Maklllng, Laguna 3 102 83.9 0.607 0.661 0.673 0.70 0.726 0.0042 lnfanra, Quezon 1 30 65.8 0.573 Q.621 0.632 0.66 0.676 0.0037

Species Average 64.9 0.590 0.641 0.653 0.68 0.702 0.0040

Aplfong, Basila!"! lDipterocarpus Monkayo, Davao del Nolfe 1 20 93.6 0.588 0.603 0.613 0.64 0.657 0.0033 eUJYf1C/1US Mlq~

~, -Apltong, broad-winged (Dlplerocarpus Buluan, Agusan del Norte l 70 113.1 0.542 0.604 0.611 0.63 0.641 0.0024

kun.slJeri King) Lol-h, Cogayon l 6 92.2 0.562 0.608 0.618 0.64 0.663 0.0035 ~lay, Negros Occ. l

I 4 78.5 0.578 0.6'Il 0.638 0.66 0.685 0.0007

lnfanta, Quezon l ll4 94.5 0.574 0.622 0.633 0.66 0.679 0.0037 Tagkawayan. Quezon < I' 5 27 ~ 98.3 0.547 0.5'91 0.600 0.62 0.642 0.0033 Bisllg, Surlgao del Sur l 60 ~ 98.1 0 .518 0.557 0.565 0.59 0.602 0.0029

Species Average 95.8 0.554 0.602 0 .611 0.63 0.652 0.0028

Bagflkan IParashorea ma/aanonan Butuan, Agusan del Norte 2 37 115.8 0.516 0 .. 555 0.563 0.58 0.600 0.0029 (Blanco) Merr.J Slbu~ Bulacan 5 73 100.8 0.515 0.553 0.562 0.58 0.598 0.0029

Famy, Laguna I

3 138 97.8 0.521 0.560 0.569 0.59 0.606 0.0030 Maklllng, Laguna 3 181 101.7 0.507 0.544 0.652 0.57 0.587 0.0028 -lnfonta, Quezon l 135 95.5 0.498 0.534 0.542 0.56 0.575 0.0027 Pagbllao, Quezon 2 79 99.0 0.506 0.543 0.551 0.57 0.586 0.0028 Bassay, Samar 4 218 104.2 0.503 0.540 0.548 0.57 0.582 0.0027 Bisllg, Surtgao del SUr 6 273 198.8 0.473 0.504 0.512 0.53 0.542 0.0014

Species Average 114.2 0.505 0.540 0.562 0.57 0.585 0.0027 ....

Banuyo (Wa/laceOdendron celeblcum Koord Makiling, Laguna 2 50 105.8 0.550 0.594 0.604 0.63 0.646 0.0034

Bitonghol (Ca/ophyl/um b/ancol Pl. & Tr.I Famy, Laguna l 15 117.2 0.510 0.548 0.556 058 0.591 0.0028 Acoje, Zamboles 2 58 98.9 0.514 0.552 0.561 0.58 0.597 0.0029

Species Aver<Jge 108.1 0.512 0.550 0.559 0.58 0.594 0.0029

Bltaog (Ca/ophyllum fnop~m L.J Maklling, Laguna l 6 77.0 0.572 0.620 0.630 0.66 0.676 0.0039

l 2 3 4 5 6 7 8 9 10 11

Celebes oak [lilhocarpus celebicus Mati, Davao Oriental 2 73 77.3 0.655 0.719 0.733 0.77 0.796 ·o.ooso U\fliq.) Rehd.J Tungao, Agusan del Sur 2 71 105.1 0.524 0.564 0.573 0.59 0.610 0.0030

Species Average 91.2 0.590 0.642 0.653 0.68 0.703 0.0040

--.......1. ... Oagang ~nisoptera aurea Foxw.J ' Famy, Laguna 6 382 118.6 0.511 0.549 0.557 0.58 0.593 0.0028

lnfanta, Quezon 4 165 105.0 0.548 0.592 0.601 0.63 0.643 0.0033 Tagkawoyan, Quezon 1 12 119.4 0.526 0.566 0.575 0.60 0.613 0.0031

Species Average r 114.3 0.528 0.569 0.578 0.60 0.616 0.0031 j

Dalung (Phyt/oc/adus hypophyllus Hook. Fl Mat~ Davao Oriental - ·- 1 57 117.2 0.530 0.571 0.580 0.60 0.619 0:0031 I -

Dangl<alan (Ca/ophytlum obltquineMum Siocon, Zamboanga del Norte 1 9 59.2 0.586 0.637 0.648 0.66 0.697 0.0039 Merr.) Famy, Laguna 3 241 90.5 osn 0.626 0.636 0.66 0.683 0.0037

lnfanta, Quezon 2 85 76.3 0.632 0.691 0.704 0.74 0.762 0.0046 Botolon, Zambales l 16 51.8 0.503 0.540 0.548 0 .57 - 0.582 0;0()27

Species Average ... 69.5 0.575 0.624 0.634 0.66 0.681 0.0037

Dao [Dracontomelon dao (Blanco) Panabo, Davao del Norte ....,

2 r'

131 106.9 0.520 0.539 0.568 0.59 0.605 0.0030 Merr. & Rolfe) Maklling, Laguna 2 57 87.3 0.546 0.589 0.599 0.62 0.640 0:0033

Mati, Davao Oriental 1 43 90.3 0.456 0.486• 0.492 0.51 0.520 0.0022 Species Average 94.8 0.507 0.556 0.565 0.59 0.602 0.0030

Glsau (Canarium vrieseanum Engl.) lnfanta, Quezon 1 '

6 96.1 0.562 0.608 0.618 0.64 0.663 0.0035 --~ ,_

~

Hagakhak IDipterocarpus va/idus Blume) Bufuan, Agusan del Norte l 48 84.3 0.563 0.609 0 .620 0.65 0.664 0.0036 Tungao, Agusan del Norte 2 82 115.2 0.491 0.510 0.517 0.53 0.548 0,0024

'· Bislig, Surlgoo del Sur 1 69 98.7 0.504 0.541 0.549 0.57 0.583 0.0027 Siocon, Zamboongo del Sur 1 69 80.S 0.567 0.614 0.625 0.65 0.670 0.00.37

Species Average .... 94.7 0.531 0.569 0.578 0.60 0.616 0.0031

lgyo Wysoxylum gaudichaudianum Makillng, Laguna 1 15 125.0 0.507 0.544 0.552 0.57 0.587 0.0028 vi.. Juss.) Miq.l

llo-ilo [Aglaia argentea Blume) Makiling, Laguna l 33 108.2 0.527 0.567 0.576 0.6 0.614 0.0031

Kalumpit (Terminalia microcorpa Oecne.) Makiling, Laguna 2 87 104.8 0.528 0.569 0.577 0.6 0.616 0.0030

l 2 3 4 5 6 7 8 9 , , 10 11

Katmon (Di/lenia philippinensis Rolfe) Acoje, Zambales 1 31 78.2 0.599 0.652 0.663 0.69 o.n5 0.0040

Kafong-laklhan (Dysoxytum cyrtobotryum Pagbilao, Quezon l 31 104.l 0.473 0.505 0.512 0.53 0.542 0.0024 Miq.) Masinloc, Zarnboles 1 63 93.5 0.617 0.673 0.686 0.72 0.740 0.0043

Species Average 98.8 0.545 0.589 0 .599 0.62 0.641 0.0034

Lamog IP/onchonia spec/obi/is Merr.J Makiling, Laguna ......... " l 8 ,,. 103.6 0.551 0.595 0.605 0.63 0.647 0.0034 lnfanta, Quezon l 45 92.5 0.605 0.659 o.6n 0.70 0.723 0.0041

Species Average 98.l 0.578 0.627 0.638 0.66 0.685 0 .00:38

Lanutan-bagyo IGonystylus macrophyllus Famy, Laguna 3 224 111.0 0.499 0.535 0.543 0.56 o.sn 0.0027 f\'liq.) Airy Shawl lnfanta, Quezon 1 24 106.4 0.502 0.538 0.546 0.57 0.581 0.0028

Maslnloc, Zambales ~' ~ 1 34 ~ n.9 0.583 0.633 0 .(>44 0 .67 0 .692 0.0038

Species Average 98.4 0.528 0.569 0.578 0.60 0.617 0 .0031

Lanutan-dilau (Polyahhia Ravo Merr.) Famy, Laguna 1 83 110.0 0.514 0.552 0.561 0.58 o.597 0.()()29

Malabetis r.Madhuca oblongifolia f\'lerr.) lnfanta, Quezon 1 5 123.5 0.526 0.566 0.575 0.60 0,613 0.0031 Merr.J ....

-Malanangk.a IParortocarpus venenosus Tungao, Agusan del Norte 1 32 85.0

(Zoll. & Mor.J Becc. ssp. papuanus ! 0.529 0.570 0.579 0 .60 0 .617 0.0003

{Becc.) Jarr .J I

Malopanau (Diplerocarpus kerril Klngl Butuan, Agusan del Norte 2 97 85.6 0.548 0.592 0.601 0.63 0.643 0.0033 Buguey, Cagayan 1 13 76.5 0.579 0.628 0 .639 0.67 0 .686 0.0038 Lal-lo, Cagayan l 9 88.7 0.547 0.591 0.600 . 0.62 0.642 0.0033 Monkayo, Davao del Norte 3 2.02 99.9 0.524 0.564 0.573 0.59 0.610 0.0030 Famy, Laguna 5 452 88.4 0.593 0.645 0.656 0 .68 0.706 0.0039 lnfanta, Quezon 1 204 87.6 0.619 0.675 0.688 0.72 0.743 0.0044 Bislig, Surigao del Sur l 70 107.2 0.512 0.551 0.559 0 .58 0.595 0.0029

Species Average _- I' 90.6 0.560 0.607 0.6J1 0.64 0 .661 0.0035

Malugai IPomelia pinna/a Forst. & Forst.) Butuan, Agusan def Norte 1 47 98.2 0.565 0.612 0.622 0.65 0.667 0.0035 Tungao, Agusan del Norte l 29 95.8 0.598 0.650 0.662 0.69 o.n3 0.0041 Palimbong, Cotabato 4 167 101.2 0 .561 0.608 0.619 0.64 0.664 0.0036 Asuncion, Davao de! Norte l 22 84.9 0.521 0.560 0.569 0.59 0.606 0.0030

1 2 3 4 5 6 7 8 9 10 11

Makiling, Laguna 1 20 87.2 0.558 0.603 0.613 0.64 0.657 0.0035 Tanay, Rizal 1 43 64.7 0.737 0.818 0.837 o.88 0.920 0.0066 Siocon, Zamboanga del Norte 1 9 84.l 0.588 0.640 0.652 0.68 0.702 0.0040

Species Average ,.

77.6 1.266 1.436 1.572 1.72 1.866 1.3785 . Maniknik IPolaquium tenulpeflolotum Lalva, Quezon 1 57 98.0 0.501 0.537 0.545 0.57 0.579 0.0028

Merr.) Acoje, Zambales 2 I 99 94.0 0.559 0.605 0.615 0.64 0.658 0.0034 Species Average 96.0 0.530 0.571 0.580 0.60 0.619 0.0031

Narro (Plerocorpus indicus Wllld. Maklllng, Laguna 5 .

166 - 122.2 0.494 0.529 0.537 0.56 0.570 0.0027 forma indicus) lnfanfa, Quezon 3

I 193 116.4 0.533 0.574 0.583 0.61 0.623 0.0032

Pagbllao, Quezon l 36 88.3 0.563 0.609 0.620 0.65 Q.664 0.0036 Species Average 109.0 0.530 0.571 0.580 0.60 0.619 0.0032

Pagsahingln ICanorium asperum Belith. Sibul Bulacan I ~ 1 83 109.3 0.500 0.536 0.544 0.56 0.578 0.0027 ssp. asperum var. asperuml . Makiflng, Laguna ~ 1 13 79.8 0.601 0.654 0.666 0.7 0.717 0.0041

Species Average 94.6 0.551 0.595 0.605 0.63 0.648 0.0034

Malapaho/Paho 'Mangifera monandra Masinfoc, Zombales -3 136 117.1 0.523 0.,563 0.571 0.59 0.609 0.0030 Merr.) Acoje, Zambales 2 55 112.9 0.528 0.569 0.577 0.60 0.616 0.0030

Species Average

I 115.0 0.526 0.566 0.574 0.60 0.613 0,0030

Pahutan tMangifera ohlssima Blanco) Famy, Laguna 2 236 ~

104.6 0.558 0.603 0.613 0.64 0.657 0.0035 fnfanfa, Quezon 1 39 102.5 0.556 0.601 0.611 0.64 0.654 0.0035 San Clemente, Tarlac 3

I 167 110.4 0.550 0.594 0.604 0.63 0.646 0.0034 Masinloc, Zambales 1 38 115.2 0.540 0.582 0.592 0.62 0.632 0.0033

Species Average 108.2 0.551 0.595 0;605 0.63 0.647 0.0034 ...

Palok-palak IPolaquium lonceo/otum Maklling, Laguna 1 6 87.2 0.548 0.592 0.601 0.63 0.643 . 0.0033 .!Blanco)

Palosopis IAnisoplera thurilera lnfanta, Quezon 2 102 102.9 0.551 0.595 0.605 0.63 0.647 0.0034 (Blanco) Blume ssp. lhurlferal Llavac, Quezon 1 50 96.4 0.547 0.591 .0.600 0.62 0.642 0.0033

San Clemente, Tarlac 3 190 108.4 ·0.529 0:?70 0.579 0.60 0.617 0.0030 Masinloc, Zambales 4 190 108.6 0.534 0.575 0.575 0.61 0.624 0.0032

Species Average 102.6 0.540 0.583 0.590 0.62 0.633 0.0032

.l 2 _3 4 5 6 7 - 8 9 ,. -10 n -

Pklnga IGanuo obovallfolio (IVlerr.) AssemJ Sibul, Bulacan l 20 , 91.l 0.579 . 0.628 0.639- 0.67 0.686 0.0038 Famy, Laguna l 31 95.4 1 0.599 0.652 0.663 0'69 Q.715 o:004b

Species Average 93.3 0 .589 0.640 0.651 0.68 0.701 0,0039

Plllng-liiton ICanarium /uzonicum Mokiling, Laguna l 27 98.7 0.489 0.524. 0.531 .0,5-5 0.563 0.0025 (Blume) A. Gray! Acoje, Zambales l 49 80.3 0.539 0.581 o._591 . 0.6J 0.631 -. 0.0032

Species Average 89.5 0.514 0.553 0.561 0.58 0.597 0.0029.

Sakat IT.erminaJia nite'1$ Presl.) Maklllng, Laguna 2 ' 34 97.5 0.564 0.610 0.621 _0.65 0,665 0.0036 Acoje, Zambales 1 20 93.2 0.625 0.683 0.69~ 0.73 . o.752 0.0044

Species Av..erage J 95.4 0.595 0.647 0.658 0.69 . 0.709 0.0040

T.qlisoi-gl.ibot (Terminal/a foelldiss(ma Griff.) Quezon, Palowon 3 187 86.2 0.547 0.5~1 0.(>00 0.62- 0.642 - 0.0033

Tindalo [Ak'ella rhomboidea (Blanco) Vidah Makillng, Laguna 1 31 104.4 0 .564 0.610 0.621 0.6-5 0.665 0.0036

Toog IP-etersianll1us quadrlo/atus Butuan, Agusan del Norte 1 32 94.0 0.568 0.615 0.926 0.65 ' 0.671 O.Q036 -Vv\err.l Merr.J Asuncion. Davao del Norte 1 64 105.5 0.547 0.591 0.600 0.62 0.642 0.0033·

Monkayo, Davao del Norte l 80 96 .1 0.578 0 .627 0.638 0.66 0.685 0.0037 Uanga, surlgao del Sur l 12 101.0 0.586 0.636' 0.647 0.68 _0.696 0.0039

Species Average 99.2 0.570 0.617 0.628 0.65 0.674 0.0036

Tuai (Bischolia /avanlca Blume) Motl. Davao Oriental l I 66 114.7 0.556 0.601 0:611 0.64 0.654 0.0034 Maklllng. Laguna 1 < 37 124.3 0.525 0.565 0.574 0.60 0.612 0.0030

Species Average 119.5 0.541 0.583 0.593 0.62 0.633 0.0032

White nafo IPouleriiJ macrantha llavac, Quezon l 31 88.8 0.562 0.608 .0.618 0.64- 0.663 0.0035 (IVlerr.) BaehnO ___.,, ... --

B. Lesser-known Species

Apaoang (Neotrewia cl)mfngii Wiuell-Arg.l Makillng, Laguna l ll 94.4 .0.546 0.589 0.599 0.62 · 0.640 0.0033 Pax & R. Hoffrn.J -

I 2 3 4 5 6 7 8 9 IO II

Bakulau lKoyea garcJoe IF-VIII.) Vesq.J lnfanta, Quezon 1 12 66.8 0.661 0.726 0.740 0.78 0.805 0.()()50 ~anabo, Davao del Node 1 48 148.2 0.406 0.429 0.435 0.45 0.456 0.0018

Species Average 107.5 0.534 0.578 0.588 0.61 0.631 0.0034

Balakat /ZiZlphus talanai (Blanco) Merr.J Makiling, Laguna 1 I 36 92.2 0.527 0.567 0.576 0.6 0.614 0.0031

Banal-banai IRadermachera pinna/a Maklllng, Laguna 2 53 102.2 0.506 0.544 0.551 0.5T 0.586 0.0062 !Blanco) Seem. ssp. pinna/al ............. ' -

Banalo [Thespesia popu/neo (LJ Maklllng, Laguna 1 I 18 109.0 0.523 0.563 0.571 0.59 0.609 0.003 Soland. exCorrJ j ,.

Batttlnan (l.ogerslroemia pyr/formis Keohne Makiling, Laguna 2 I 119 124.3 0.502 0.538 0.546 0,57 0.581 0.0028 forma balilinan (Vidab Furt. & Srls. ~

~,, I

,;'

Bignal-kolabou 'Antklesma pleurlcum Tul.J Maklllng, Laguna l 9 94.0 0.593 0.645 0.656 0.68 0.706 0.0039

Java sala 15/oanea iavanica ~iq.J S~s. ex lnfanta, Quezon l I 58 108.3 0.531 O.S-12 0.581 0.60 0.620 0.()()31 K.Schum.J

Kalimatas IPhaeanthus ebradeo/atus Makilng, Laguna L~1r 1 I 7 - 92.2 0.561 0.007 0.617 0.64 0.661 0.003-5 (Presl.) Merr.J

1r Kallngag (Cinnamomum mercadoi Vidal) Tungao, Agusan del Norte 1 I 33 137.6 0.401 0.424 0.429 0.44 0.450 0.0017

Magpet, Cotabato del Norte l 36 71.1 0.647 0.709 0.723 0.75 0.784 0.0048 Species Average 107.4 0.524 0.567 0.576 0.60 0.617 0.0033

__,- '' ....

Kangko fAphanamixis polystochya (INall.J Mati, Davao Oriental l 56 115.8 0.530 0.571 0.580 0.60 0.619 0.0031 R.N. Parker) Makillng, Laguna 2 62 98.23 0.546 0.590 0.599 0.62 0.641 0.0034

Species Average 107.0 0.538 0.581 0.590 0.61 0.630 0.0033

Kato [Aglaia ctx:u/lata (Roxb.I Pellegr.J Acoje, Zambales l 42 76.7 0.598 0.650 0.662 0.69 0.713 0.0041

Katong-matsin IChisocheton pentan<frus :Makillng, Laguna l 11 127.2 0.518 0.557 0.565 0.59 0.602 0.0029 (Blanco) Merr. ssp. pentandrusJ

I l 2 3 4 6 7 · a 9 10 H :,

-

Kubi JArtocarpus nUidus Tree. ssp. nifidus) Pagdanan, Palawan 2 91 96.3 0.578 0.627 0.638 0.66 0.685 0.0037

Kullng-manuk !Aglaia Juzonlensis Pagdanan, Palawan .. l 98 114.4 0.512 0.550 0.556 0.58 0.594 0.0029 MdaQ Merr. & Rolfe)

Kusibeng (Sapindus saponarea L.l Makiling, Laguna l 20 101.7 0.583 0.663 0:644 0.67 0.692 0.0038

Lago !Prunus grisea (Blume) Kalkm. var. Makiling, Laguna l 6 ,,,. 91.2 0.566 0.613 0.623 0.65 0.668 0.0036 gr/seaJ

llndog-ilonan 18/umeodeodron tokf)rai Acoje, Zambales 1 20 97.0 0.574 0.622 0.633 0.66 . 0.679 0.0037 !Blume) Kurz)

· Malalagpo 'Ardis/a pirifo/ia Mez) Real, Uavac. auezxon ~·

l 36 94.2 0.563 0.609 0.620 0.65 0.664 0 .0036

Malubago !Hibiscus tiliaceaus L. ssp. lnfanta, Quezon 1 46 119.0 0.571 0.619 0.629 0 .66 0.675 0.0036 tiliaceus) i

Mamalls [Pinosporum pentandrum Sibul, Bulakan l J''

22 95.7 0.512 0.550 0.558 0.58 0.594 0.002.9 '

(Blanco) MerrJ . , ~

~

Pangi (Pang/um edu/e Reinw.) Ma~iling, Laguna 2 I' 1:

36 ,,..

112.6 0.504· 0.541 0.549 0.57 0.583 0.0027

' Panglongboien ISyzygium simile UV1err.) Makiling, Laguna 1 30 106.1 0.558 0.603 0.613 0.64 0.657 0.0035 Merr.J I

Philippine chestnut [Castanopsls Motl, Davao Oriental l 46 129.8 0.505 0.542 0.550 0.57 0.585 0.0028 phllippensis (Blanco) VidaO -

Tapmls 1rernstroemla megacarpa Merr.) Uavac, Quezon l I 42 83.1 0.534 0.575 . 0.585 0.61 0.624 0.0032

Usuang-saha (Endiandra !axillora Merr.J lnfanta, Quezon 1 72 109.7 0.536 0.578 0.587 0.61 0.627 0.0032

---Vidal lanutan !Hibiscus campytosiphon Makiling, Laguna - - 4 170 93.7 0.532 0 .573 0.582 0.60 0.621 0.0031 Turcz. var. glabrescens twarb. ex Perk.) Borss.J

l 2 3 4 5 6 7 8 9 10 11

Katong-lakihan IDysoxylum crytoboltym Pogbllao, Quezon l 31 104.1 0.473 0.505 0.512 0.53 0.542 0.0240 Mlq.) Masinloc, Zamboles l 63 93.5 0.617 0.673 0.686 0.72 0.740 0.0043

Species Average 98.6 0.545 0.589 0.599 0.62 0.641 0.0142 -

C. Plantation Species

Banaba (lagerslroemia speciosa IL.I Pers.I Maklllng, Laguna 1 57 97.6 0.592 0.642 0.654 0.68 0.703 0.0040 Pafllng. Tarlac 2 . lll 114.9 0.534 0.575 0.585 0.61 0.624 0.0032

Species Average 3 106.3 0.563 0.609 0.620 0.64 0.664 0.0036

Lukban [Citrus grandis IL.I Osb.J Makiling, Laguna 1 8 96.7 0.592 0.643 Q.635 0.69 0.705 0.0040

Mahogany, big-leafed !Swielenia Makmng, Laguna 4 238 105.6 0 .526 0.566 0.575 0 .60 0.613 0.0031 monagoni IL.I Jacq.J Pagudpud, !locos Norte 3 44 111.2 0.442 0.470 0.476 0.49 0.502 0.0021

Dingras, !locos Norte 3 51 97.7 0.542 0.585 0.594 0.62 0.635 0.0032 Species Average 104.8 0.503 0.540 0,548 0.55 0.583 0.0028

Nongka/JacKfiuit l,Atlocorpus neterophyllus Makiling, Laguna l 16 97.6 0.599 0.652 0.663 0.69 0.715 0.0040 Lamk.J .

Pararubber [Hevea brasl/iensis IHBK.l Makillng, Laguna L~ 4 122 117.0 0.573 0.593 0.582 0.60 0.621 0.0031 Muell.-Arg.J National DeV't. Corp. 5 158 117.6 0.511 0.549 0.557 0 .59 0.593 0.0028

Species Average 117.3 0.542 0.571 ·o.570 0.59 0.607 0.0030

Pine, BengueHPinus kesiya Royle ex CID, Cellophll 5 148 67.6 0.545 0.583 0.593 -0:62 0.634 0.0033 Gordon) Manila 3 33 175.3 0.415 0.440 0.445 0.46 0.467 0.0018

Bauko, Mt. Province 7 243 94.0 0.505 0.542 0.550 0.57 0.585 0.0028 Species Average 112.3 0.488 0.522 0.529 0.55 0.562 0.0026

Pine, Mindoro IPinus merkusii Jungh. Acoje, Zambales 1 21 92.7 0.548 0.592 0.601 0.63 0.643 0.0033 et de Yriese) Masinloc, Zambales 2 125 79.6 0.562 0.608 0.618 0 .64 0.663 0.0035

Species Average 86.Z 0.555 0.600 0.610 0.63 0.653 0.0034

l 2 3 4 5 6 7 8 9 lO 11

~.Moderately low Relative Density (Values ranging from 0.400 to 0.499) ,,

I

A. Commercial Species

Almaciga r,A.gathis philippinensis Famy, Laguna l 40 97.l 0.416 0.441 0.446 0.46 0.469 0.0018 Warb.) lnfanta, Quezon --------..... I• 5 241 89.2 0.409 0.433 0.438 0.45 0.460 0.0017

Makiling, Laguna 2 42 104.7 0.436 0.463 0.469 0.48 0.494 0.0016 Species Average 97.0 0.420 0.446 0.451 0.46 0.474 0.0017

Almon IShorea almon· Foxw.) Butuan, Agusan del Norte 2 96 116.0 0.376 0.396 0.400 0.41 0.418 0.0015 Sobud, Agusan del Sur 2 78 105.6 0.387 0.406 0.413 0.42 .0.432 0.0016 Tungao, Agusan def Norte l

' 49 - 103.6 0.473 0.505 0 ,512 0.53 0.542 0.0024

Pallmbang, Cotaboto l 52 119.6 0.414 0.439 0.444 0.45 0.466 0.0018 Asuncion, Davao del Norte 2 91 117.6 0.409 0.414 0 .419 0.43 0.438 0.0016 Ponabo, Davao del Norte l 41 154.5 0.309 0.322 0 .325 0.33 0.337 0.0010 Colafraba, Negros Occ. 2 ~ 15 95.4 0.448 0.477 0.483 0.$0 0.510 0.0021 Sipalay, Negrols Occ. 1 4 86.9 0.492 0.527 0.535 0.55 0.567 0.0026 Togkawayan, Quezon 5 77 .,... 112.7 0.418 0.443 0.448 0.46 0.471 0.0018 Bisllg, Surlgao del Sur 2 82 ..... 111.6 0.406 0.420 0.435 0.45 0.465 0.0017 Lanuza, 5urlgao del Sur 2 33 Tl.a 0.496 0.532 0.539 0.56 0.573 0.0026 Lianga, Surtgao del Sur 3 15 91.8 0.413 0.437 0.443 0.46 0.465 0.0018 Sudecor, Surlgao del Sur 5 171 134.9 0.440 0.448 0.474 0.49 0.499 0.0020

Species Average 109.8 0.422 0.445 0.452 0.46 0.476 0.0019

Antlpolo (Artocarpus b/ancol {Elmer) Merr.J Tungao, Agusan del Norte 1 l 48 126.5 0.388 0.409 0.414 0.43 0.433 0.0016 Maklllng, Laguna 1

' 102 186.3 0.326 0.341 0.344 0.35 0.358 0.0011

Palimbang, Cotabato 2 64 135.4 0.468 0.500 0.506 0.52 0.536 0,0023 Sta. Cruz Zambales l 36 132.7 0.472 0.504 0.571 0.53 0.541 0.0024

Species Average 145.2 0.414 0.439 0.459 0.46 0.467 0.0019

Anubing IArtocarpus ova/us Blanco) Makiling, Laguna ___.,I• 2 68 ... 127.3 0.470 0.502 0.509 0.53 0.538 0.0024

Basikong (ficus boltyocarpa Miq. var. Makiling, Laguna l 10 159.7 0.430 0.456 0.462 0.48 0.486 0.0020 boflyocarpaJ

l 2 3 4 5 6 7 8 9 10 ll

Batikullng /}.i/sea leytensis Merr.I Tungao, Agusan del Norte 1 135 103.2 0.322 0.337 0.340 0.35 0.353 0.0010 Motl, Davao orienta 1 69 145.0 0.353 0.371 0.374 0 .38 0.390 0.0012 Real, Llavac, Quezon ----...1. 1 59 124.4 0.433 0.460 0.466 0.48 0.490 0.0020 Acoje, Zarnbales 2 66 96.8 0.450 0.479 0.485 0.50 0.512 0.0022

Species Average 117.4 0.390 0.412 0.416 0.40 0.436 0.0016

Hagimit IFiCus minahassae (f eilsrn. & I deVr.Mlq.J

Makillng. Laguna 1 \ 47 188.0 0.419 0.444 0.450 0.46 0.472 0.0013

lgem IDacrycarpus imbricatus (Blume) Lanao 1 ~ 1 . 15 - 84.2 0.469 0.501 0.508 0.52 0.537 0.0023 I de Laub. var. patulus de Laub. Ii 1 I•

Kalunti IShorea hopeifolia (Heim) Sym.J Basilan Cily 1 14 127.2 0.458 0.488 0.495 0.51 0.523 0.0023 Panabo, Davao del Norte l ' 40 128.4 0.401 0.424 0.495 0.41 0.450· 0.0017 Siocon, Zamboanga del Norte 1 9 .... 65.9 0.452 0.481 0.485. . 0.50 . 0.515 0.0022

Species Average ~ 107.2 0.437 0.464 0.492 0.46 0.496 0.0021

-1 ~

.,..

Kullng-babui tDysoxytum excetsum Blume) Patling, Tarfac 1 ! 59 136.4 0.424 ~, .. _

0.4.50 0.455 0.47 0.479 0.0019

Lamio IDraeontome/on edule Maklllng, Laguna 1 I 30 136.l 0.459 0.489 0.496 0.51 0.524 0.0023 (Blanco) Skeels) ,.

Lanipau (Terminalia copelandii Elmer.I Butual'), Agusan del Norte ~ •~ 5 . 79 - 81.1 0.458 0.488 0.459 0.51 0.523 . 0.0023

Lauan, Red IShorea negrosensts Foxw.J Butuan, Aguson del Norte 1 I 64 99.8 0.395 0.4J7 0.422 0.43 0.442 0.0017 Slbul, Bulacan, 1 9 96.2 0.405 0.428 0.433 0.45 0.455 ', 0,0018 Sanchez, Mira Cagayan 2 8 95.6 0.471 0.503 0.510 0.53 0.540 0.0024 Famy, Laguna 5 261 .. 97.4 0.467 0.498 0.505 0.52 0.534 0.0024 Calatrava, Negros Occ. 3 21 112.6 0.375 0.395 0.399 0.41 0.417 0.0015 Sipalay, Negros Occ. 1 4 97.1 0.418 0.443 0.448 0.46 0.471 0.0018 lnfanta, Quezon 3 98 105.1 0.447 0.476 0.482 0.50 0.408 0.0021 Llavac, Quezon l 44 100.6 0.481 0.541 0.522 0.54 0.553 0.0025 Basey, Samar 3 410 98.6 0.548 0.592 0 .601 0.63 0.643 0.0033 Lanuza, Surigao del Sur 2 45 80.6 0.473 0.505 0.512 0.53 0.542 0.0024

/ Marlhatag, Surigao del Sur 3 254 128.9 0.429 0.455 0 .461 0.48 0.485 0.0020 Species Average 101.2 0.446 0.478 0.481 050 0.499 0.0022

1 2 3 4 5 _ 6 7 8 9 IU 11

Lauan, White (Shorea-contorla Vidal) Butuan, Agusan del Norte 1 63 107.8 0.396 0.418 0.423 0.44 0.443 0.()()]7 - Sibul Bulacan, 1 8 109.0 0.460 0.490 0.497 0.51 0.525 0.0023

Buguey, Cagayan 2 20 84.6 0.518 0.537 0.565 0.59 _().602 0.0029 Famy, Laguna 5 420 126.5 0.437 0.464 0.470 0.49 0.495 0.0021 Maklling, Laguna. 3 282 124.0 0.432 0.459 0.465 0.48 0.489 0.0020 Sipalay, Negros Occ. ----.... 1 4 100.8 0.394 0.416 0.421 0.43 0.441 0.0016 tnfanfa, Quezon 2 60 104.0 0.447 0.476 0 .482 0.50 0.508 0.0021 Polllio, Quezon 1 12 66.1 0.396 0.418 0.423 0.44 0.444 0.0011 Lanuza, SUrlgao del SUr 1 52 91.4 0.398 0.421 0.425 0.44 0.446 0.0016

Species Average 101.6 0.431 0.455 0.463 0.48 0.488 0.0020

Loklnai (fJaaydium beccarii Parl~ Motl, Davao Oriental 1 43 111.1 0.479 0.512 0.519 0.54 0.530 0.0025 ~1-

Magabuyo (Cellis /uzonica Warb.) Palimbang, Cotabato 1 59 150.4 0.434 0 .461 0.467 0.48 0.492 0.0020 MakHlng, Laguna 1 26 111.5 - 0.542 0.585 0 .594 0.62 0.635 0.0032

Species Average I

131.0 0.488 0.523 0.531 0.55 - 0.564 0,0026

Malaanonang (Shorea polila Vidal) Loi-lo, Cagoyan l 12 -.... 114.3 0.451 0.480 0.487 0.50 0.514 0.0022

lnfanta, Quezon 2 10 112.6 0.495 0.530 0,538 0.56 0.57f 0.0027 Lanuza, Surlgoo del SUr l 54 96.2 0.446 0.475 0.481 0.50 0;507 0.002·1

Species Average -' 107.7 0.464 0.495 0.502 0.52 0.531 0.0023 I ' I>

Malakouayon IPodocarpus rumphii Blume) Tungao, Agusan del Sur l 38 65.9 0.48 0.513 0.52 0.54 0.551 0.0025 Sibuf. Bulacan l 2 44.l 0.554 0.599 0.609 0.63 0.651 0.0034 Matt. Davao Oriental l 50 89.9 0.473 0.503 0.512 0.53 0.542 0.0024 lnfanta, Quezon = l 30 91.6 0.483 0.517 0.524 0.54 0.555 0.0025 Maslnloc, Zambales 3 107 89.4 0.495 0.530 0.538 0.56 0.571 0.0017

Species Average 762 0.497 0.532 0.541 0.56 0.574 0.0025

Malakma~[f'amqwmphUppense Pallrnbang. Cotabato l 78 154.0 0.342 0.359 0.363 0.37 0.378 0.0013 Perr.) ~.B. R~ _ · Makillng, Laguna l 22 143.8 0.358 0.376 0.380 0.39 0.396 0.0013

Patling, Tarlac ______.,,

l 42 ..

106.1 0.521 0.560 0.569 0,59 0.606 0.0030 Species Average 134.6 0 .407 o.432 0.437 0.45 : 0.460 O;Q019

Matatatuto (Plerocymbium macrocrafer Matl, Davao Oriental l 51 127.3 0.473 0.505 0.512 0.53 0.542 0.0024 Warb-.)

l 2 3 4 5 6 7 ·8 9 lO ll . Manggaslnoro lShorea asamica Dyer Lal-lo, Cagayan l 9 95.0 0.486 0.520 0.528 0.55 0.559 0.0026

spp. philippinensis !Brandis) SymJ Monkayo, Davao del Nort~ l 9 95.Q 0.403 0.426 0.431 0.44 0.452 0.0017 lnfonta, Quezon 4 307 136.9 0.394 0.416 0.421 0.43 0.441 0.0016 Bisllg, Surigoo del Sur l 47 _,.

132.2 0.395 0.417 0.422 0.43 0.442 0.0017 ..

Species Average 114.8 0.420 0.445 0.451 0.46 0.474 0.0019

Manggastnorong-klkihan IShorea Monkayo, Davao del Norte 1 27 79.7 0.418 0.443 0.449 0.46 . 0.472 0.0019 virescens ParijsJ

Morang [Lilsea perronetii (Blume) F_.-Vill.J Famy, Laguna ~ l~ 26 154.6 0.421 0.446 0.452 0.47 0.475 . 0.00.19 lnfanto, Quezon 1 12 103.6 0.486 0.520 0.528 Q.55 0.559 0.0026 Acoje, Zambales 1 66 96.8 0 .450 0.479 0.485 0.50 0.512 0.0022 Real, Llavac, Quezon l I 59 61.9 0.529 0.570 0.579 0.60 0.617 0.0030

Species Average 104.2 0.472 0.504 0.511 0.53 0.541 0.0024 ~.

Nafo (Palaquium Juzontense (F.-Vill.l VidaU Asuncion, Davao del Norte l 54 135.3 0.415 0.440 0.445 0.46 0.467 0.0018 Matl, Davao Oriental l 39 109.8 0.502 0.538 0.546 0.57 0.581 0.0028 Lanuza, Surigoo del Sur l 38 95.2 0.436 0.463' 0.469 0.48 0.494 0.0020 Real, Llavac, Quezon l 68 92.6 0.373 0.623 0.634 0.66 0.681 0.0037

Species Average 108.2 0.432 0.516 0.524 0.54 0.556 0.0026

Noto Villamil lPouleria villamilil Makiling, Laguna l 46 124.0 0.474 0.506 0.513 0.53 0.544 0.0025 UiAerr.) Baehnij ~

Pogurlngon !Cratoxylum sumatranum Tungoo, Agusan del Norte l I' 36 111.2 0.495 0.530 0.538 0.56 0.571 0.0027 UackJ Blume ssp. sumatranum Robs.I I

Rolntree/Acacia [5amanea saman Makillng, Laguna 3 98 161.0 0.447 0.476 0.482 0.50 0.508 0.0021 (Jacq.) Merr.J Dillman, Quezon City -~~ l 39 144.5 oAn 0.510 0.517 0.53 0.548 0.0024

Species Average 152.8 0.462 0.493 0.500 0.52 0.528 0.0023

Tonglle (Shorea potysperma !Blanco) Butuan, Agusan del sur 1 80 103.9 0.410 0.434 0.439 0.45 0.461 0.0018 Merr.J Sobud, Agusan del Sur 2 85 96.4 0.406 0.430 0.435 0.45 0.457 ' 0.0018

Sibul, s·ulacan 2 13 84.4 0.476 0.509 0.516 0.53 0.546 0.0024 Sanchez Mira, Cagayan 3 44 80.2 0.530 0.571 0.580 0.60 0.619 0.0031 Palimbang, Cofabato 2 158 91.3 0.424 0.450 0.456 0.47 0.481 0.0020

l 2 3 4 5 6 7 8 9 lO 11

Asuncion, Davao del Norte 3 101 96.2 0.373 0.393 0.397 0.41 0.415 0.0014 Panabo, Davao del Norte 1 37 103.3 0.410 0.434 0.439 0.45 0.461 0.0018 Famy, Laguna 4 195 95.5 0.465 0.496 0.503 0.52 0.532 0.0023 Calatrava, Negros Occ. 3 22 82.3 0.484 0.517 0.525 0.54 0.557 0.0025 Sipalay, Negros Occ. 1 6 73.6 0.466 0.497 0.504 0.52 0.533 0.0024 lnfanta, Quezon 4 180 79.1 0.494 0.529 0.537 0.56 0.570 0.0027 Llavac, Quezon 2 75 81.8 0.511 0.522 0.530 0.55 0.562 0.0026 Polilio, Quezon 1 6 77.l 0.492 0.327 0.535 0.55 0.568 0.0026 Bislig, Surigao def Sur 2 101 93.8 0.478 0.511 0.518 0.54 0.549 0.0025 Lanuza, Surtgao del Sur 3

. 103 84.7 0.470 0.502 0.509 0.53 0.538 0.0024

Masinloc, Zambales 3 134 90.8 0.494 0.529 0.537 0.56 0 .570 0.0027 Species Average 83.5 0.787 0.862 0.939 0 .51 1.083 0.6492

~ J B. lesser-known Species

Alim 1Me1ano/epis muUtglandu/osa Makiling, Laguna 1 ' 16 141.1 0 .424 0.450 0.455 0.47 0.479 0.0019 (Reirm. ex Blume) Rek:hb. & Zoll. 11

var. rnuUfglandulosaJ i

Antsoan-dilau !Senna spectabills Makiling, Laguna 2 42 134.8 -0.484 0.518 0.525 0.54 0.557 0.0025 (DC.} Irwin & Barnebyl

Apanil 1Mastixia pentandra Blume ssp. Famy, Laguna 1 ' 49 120.0 0.448 0.477 0.483 0.50 0.510 0.0021 philippinensis !\Nang.! Matt.I lnfanta, Quezon 1 19 112.2 0.497 0.533 0.541 0.56 0.574 0.0027

Species Average 116.1 0.473 0.505 0.512 0.53 0.542 0.0024

Balukanag (Chisocheton curningianus Pagdanan, PakMtan 2 84 147.1 0.432 0.459 0.465 0.48 0.489 0.0020 (C.DC.l Harms. ssp. cumingianusJ Makiling, Laguna l 3 116.9 0.520 0.559 0.568 0.59 0.605 0.0030

Species Average / 132.0 0.476 0.509 0.517 0.53 0.547 0.0025

Batete !Kingiodendron a/lernilotium Panabo, Davao del Norte l 42 ... 117.0 0.483 0.517 0.524 0.54 0.555 0.0025 (Elmer) Merr. & Rolfe)

Bayol< (Plerospermum diVersitO/ium Blume) Tungao, Agusan def Norte 1 27 100.l 0.443 0.471 0.477 0.49 0.503 0.0021

Danglin (Grewia mUUitora Juss.) Makiling, Laguna l 3 109.9 0.462 0.493 0.499 0.52 0.528 0.0023

l 2 3 4 5 6 7 8 9 10 11

Hangilo IE/merillio plalyphyl/a W\err.) Noot.J Tungao, Agusan del Norte 1 48 141.3 0.368 0.387 0.391 0.40 0.409 O.<Xr14 Vv'lerr .) Noot.J Sipalay, Negros Occ. 1 10 107.0 0.506 0.543 0.551 0.57 0.586 0.0028

Species Average 124.2 0.437 0.465 0.471 0.49 0.498 0.0021 ,.... ltangan (Weinmannio luzoniensis Vidal) . lnfanla, Quezon 1 6 132.2 0.490 0.525 0.532 0.55 0.565 0.0026

Japanese older IA/nus maritima W\arsh.) Baguio City 5 146 112.4 0.432 0.459 0.464 0.48 0.489 0.0020 Nutt.] .

Kubili !Cubl/ia cubili !Blanco) AdelbJ Makiling, Laguna l 15 116.6 0.486 0.520 0.528 0.55 0.559 0.0026

Lingo-lingo I Vilex turczaninowii Merr.) Maklling, Laguna l )

55 121.7 0.487 0.521 0.529 0.55 0.561 0.0026

Santiki IC/e!dion splcfflorum (Burm. ti Merr.I Makiling, Laguna 1 21 139.9 0.495 0.530 0.538 0.56 0.571 0.0027

TadlOng-anuang !Canthium monstrosum Makiling, Laguna ~-_... 1 ~

1 12 138.6 0.442 0.447 0.453 0.47 0.476 0.0019 IA. Rich.) Merr.J ··~

I~ . c. Plantation Species . .

Baguilumbang !Rel./f!a/is lrtsperma Mokiling, Laguna 1 I 43 138.3 0.427 0.543 0.459 0.47 0.483" . 0.0019 (Blanco) Airy ShOWJ

Bagras (Eucalyptus deg/up/a Blumel Picop, Surigoo del Sur 3 66 163.6 0.423 0.449 0.454 0.46 0.478 0.0090 !

Durian (Durio zibet~us Murray) BasilanCify 1 12 145.3 0.435 0.462 0.468 0.48 0.493- 0.0020

Manglum (Acacia mangium Wllld.J Picop, Surigao del Sur 10 105 141.8 0.403 0.421 0.431 0.44 0.452> 0,0022 PTFI, Agusan del Sur -~~· 13 129

..... 80.3 0.520 0.559 0.568 0.59 o.60S . 0°.0005

PTFI, Mindoro 5 102 140.0 0.476 0.509 0.516 0.53 0.546 0.0025 Species Average 120.7 0.466 0.496 0.505 0.52 0.534 0.0017

Santol [Sandoricum koeljape (Burm.!.) Tungao, Agusan del Norte l 45 218.8 0.327 0.342 0.345 0.35 0.359 0.0011 Merr,J Polilio, Quezon 1 9 96.1 0.434 0.461 0.467 0.48 0.492 0.0020

.. .. Makillng, Laguna 1 21 134.4 0 .443 0.471 0.477 0.49 0.503 0.0021 Species Avetaqe 149.8 0.401 0.425 0.430 0.44 0.451 0.0017

l 2 3 4 5 6 7 8 9 lO II

Teak (Tectona graiKiis L.f.) Makiling, Laguna 3 83 116.0 0.499 0.535 0.543 0.56 0.577 0.0027

Yemane·tGmelina arborea Roxb.) Makiling, Laguna 5 132 170.3 0.411 0.435 0.440 0.45 0.462 0.0018

V. t()W'Reloflve Density (Values ranging from 0.400 and below)

A. Commercial Species

Anablong I Trema orien/alis (L.) Blume) Maklling, Laguna 3 I

131 234.8 0.308 0.321 0.324 0.33 - 0.330 0.0010 lnfanta, Quezon 1 13 242.3 0.302 0.115 0.318 0.32 0.329 0.0009

Species Average ~

238.6 0.305 0.218 0.321 0.33 0.333 0.0010 I

Anll (Ery/hrina fusca Lout.) Famy, Laguna l 6 274.4 0.254 0.263 0.265 0.27 0.273 0.0006

Anllau (Colona serralifolia Cav.) Famy, Laguna 1 28 1612 0.037 0.386 0.390 0.40 0.407 0.0014 Makiling, Laguna 1 3 108.5 0.041 0.435 0.440 0.45 0.462 0.0018

Species Average 134.9 0.039 0.411 0.415 0.43 0.435 0.0016

Dita r.A/slonia scnolaris IL.IR. Br. Makiling, Laguna 2 106 137.3 0.360 0.378 0.382 0.39 0.399 0.0014 var. sc/10/arisJ

Earpod IEn/ero/obium cyclocarpum Maklling, Laguna l 43 215.3 0.354 0.372 0.376 0.39 0.391 0.0013 Uacq.) Grlseb.J

Hamindang 1Macaranga bicolor Famy, Laguna 1 1

24 190.7 0.291 0.303 0.305 0.31 0.316 0.0008 Muell-Arg.) .

Kalantas (Toona ca/an/as Merr. & Rolfe) Asuncion, Davao del Norte l 17 124.2 0.294 0.306 0.309 0.32 0.319 0.0009 1 ~

Kupang [Parkia limoriana !DC.) Merr.J Maklling, Laguna - --~-~ l 90 ~ 225.0 0.344 0.361 0.364 0.37 0.379 0.0012 Acoje, Zambales 2 115 166.0 0.398 0.420 0.425 0.44 0.446 0.0017

Species Average 3 195.5 0.371 0.391 0.395 0.40 0.413 0.0015

Malabuho (Slercu/ia oblongala R.Br.) Makiling, Laquno 1 30 256.2 0.296 0.308 0.311 0.32 0.322 0.0009

1 2 3 4 5 6 7 8 9 10 11

Malakalumpang !Sfercu/ia ceramica R.Br.J Fa my, Laguna 1 76 261.3 0.270 o.28o 0.282 0.29 0.291 0.0007 I

Mayapls [SfJOrea patosapis (Blanco) Merr.J Sabud, Agusan del Sur ., 41 ;' 132.5 0.333 0.349 0.352 0.36 0.366 0.0011 Tungao, Agusan del Norte 1 54 169.6 0.310 0.324 0.326 0.33 0.338 0.0009 Sibul, Bulacan 3 19 113.8 0.433 0.471 0.477 0.49 0.503 0.0021 Buguey, Cagayan 1 9 101.5 0.472 0.:504 0.511 0.53 0.541 0.0024 Palirnbang, Cofabato 2 121 140.4 0.355 0.374 0.378 0.39 0.394 0.0013 Asuncion, Davao del Norte 1 46 153.0 0.337 0.354 0.357 0.37 0.372 0.0012 Monkoyo, Davao del Norte 2 85 110.6 0.412 0.436 0.441 0.45 0.464 0.0018 Famy, Laguna 3 215 141.2 0.372 0.392 0.396 0.41 0.414 0 .0014 lnfanta, Quezon 4 314 126.3 0.391 0.413 0.417 0.43 0.437 0.0016 Llavac, Quezon 1 35 107.0 0.387 0.408 0.413 0.42 0.432 0.0016 Polilio, Quezon l 9 93.9 0.364 0.383 0.387 0,40 0.404 0.0014 Tagkauayan, Quezon 4 50 ..... 124.6 0.394 0.416 0.421 0.43 0.441 0.0016 Bislig, Surigao del Sur ~ 2 57 110.6 0.436 0.463 0.469 0.48 0.494 0.0020 Lanuza, Surigao del Sur - 3 111 , lll .9 0.417 0.442 0.447 0.46 0.470 0.0018 Lianga, Surigao del Sur 6 210 148.2 0.378 0.398 0.403 0.41 0.421 0.0015

Species Average 125.7 0.386 0.408 0.413 0.42 0.433 0.0016

Millplll ICanarium hirsutum Willd. spp. Famy, Laguna 1 42 163.6 0 .397 '0.419 0.424 0,44 . 0.445 0.0017 /J/rsutum var. hirsutumJ

-.Rarang lfryfhrina subumbrans /Hassk.J Makiling, Laguna 1 50 341.4 . 0.236 0.244 0.245 0.25 0.252 0.0005 Merr.J

Taluto IPferocymbium finctorlum Tungao, Agusan del Norte 1 39 153.0 0.343 0.360 0.363 0.37 0.378 0.0012 (Blanco) Merr.J Makiling, Laguna 2 73 278.8 0.278 0.289 0.291 · o.3o 0.310 0.0008

Species Average .....

215.9 0.311 0.325 0.327 0.33 0.344 0.0010 ~-

naong 15/Jorea ova/a Oyer ex Brandis) Butuan, Agusan del Norte 2 102 117.5 0.332 0.348 0.351 0.36 0.365 0 .0011 Tungao, Agusan del Norte 2 99 128.4 0.308 0.321 0.324 0.33 0.336 0.0010 Tagkawayan, Quezon 1 8 100.4 0.462 0.493 0.499 0.52 0.528 0.0023

Species Average 115.4 0.367 0.387 0.391 0.40 0.410 0.0015

l 2 3 4 5 6 7 8 9 10 n

B. Lesser-known Species

Anongo (Turpinia ova/ifo//a Elmer) Makillng, Laguna 2 35 172.0 0.364 0.383 0.387 0.40 0.404 0.0013

Anuling IP!sonia umbel//fera (ForsQ Seem.) Makillng, Laguna l 16 393.7 0.214 0.220 0.222 0.23 0.227 0.0005 _,..

Balakat-gubat l5apium tuzontcum (Vidal) Maklllng, Laguna 2 87 148.2 0.396 0.418 0.423 0.44 0.443 0.0017 Merr.J

~

Balantl [Homatanthus populneus lnfanfa, Quezon l 15 168.5 0.381 0.402 0.406 0.42 0.425 0.0015 (Geisel.I Pax var. poputneusJ

~

1,

Balllang-uak IMeliosma pinna/a (Roxb.I Makillng, Laguna 1 7 216.9 0.266 0.276 0.278 0.28 0.287 0.0007 Maxim. ssp. macrophylla Merr.J

Bangulo (Li/Sea garctae Vldall Makiling, Laguna 1 l 172.2 0.344 0.361 0.364 0.37 0.379 0.0012 __..

Bayok-bayokan (Plerospermum niveum Pagdanan, Polawan 2 114 132.9 0.356 0.373 0.378 0.39 0.394 0.0019 VidaQ

Kanana 1Zon/11oxylum llmone//o (Dennst.J Famy, Laguna l 15 172.8 0.333 0.349 0.352 0.36· 0.366 0.0011 Alston]

Kamullng !Microcos stylocarpa (Warb.J Makillng, Laguna l 18 138.6 0.396 0.418 0.423 0 .44 0.445 0.0017 Burr.I

i '

Labayo IMelochla umbel/ala (Houtt) Stapf.I Makillng, Laguna 1 •' 30 351.8 0.247 0.256 0.257 0.26 0.263 0.0006

Mabunot ((;omphandra tuzontensis Mokiling, Laguna 2 29 206.4 0.367 0.386 0.390 0.40 0.407 0.0014 Vv\err.) Merr.J ~-,_.-

Malabulak l5almol/a malabarica !DCJ Gumoco, Quezon 5 91 193.5 0.358 0.376 0.380 0.38 0.396 0.0020 Schott & Endl.J Maklling, Laguna 2 34 197.4 0.324 0.339 0.342 0.35 0.355 0.0010

Species Average 195.5 0.341 0.358 0.361 0.37 0.376 0.0015

l 2 3 4 5 6 7 8 9 10 ll

Matang-arau IMelicope lrlpl1y!Ja (lom.J Makiling, Laguna l 16 168.7 0.374 0.394 0.398 0.41 0.416 0.0014 Merr.J

Pinka-pinkahan !Oroxytum Ind/cum IL.I Famy, ~aguna .........

l 14 207.8 0.316 0.440 0.444 0.34 0.345 0.0010 1~

Kul7] Makiling, Laguna l 10 160.2 0.317 0.331 0.334 0.34 0.347 0.0010 Species Average 184.0 0.317 0.386 0.389 0.34 0.346 0.0010

Tan-ag (Klelnhovta 11osplla LI Famy, Laguna 1 29 189.2 0.335 0.351 0~354 0,36 0.368 0.0011 MaklUng, Laguna l 39 163.7 0.392 0 .414 0.419 0.43 0.438 0.0016

Species Average 1~ 176.5 0.364 0.383 0.387 0.40 0.403 0.0014

Tangisang-bayawok lflcus varlegata Tungoo, Agusan del Norte y 39 398.2 0.204 0.210 0.211 0.21 0.216 0.0004 Blume var. variegota) Makiling, Laguna 44 273.8 0.282 0.293 0.295 0;30 0.305 0.0008

Species Average 336.0 0.243 0.252 0.253 0.26 0.261 0.0006

-Tulo IA!ph/!Onla phlllpplnensis Braid) lnfanta, Quezon ~ l 30 139.3 0.395 0.417 0.422 0.43 0.442 0.0017

C. Plantation Species

Balsa (Ochroma pyramidale (Cav.) Urb.J Makiling, Laguna 2 46 238.4 0.295 0 .307 0.310 0.32 0.321 0.0009 I

Gubas !Endospermum peUatum Merr.1 Tungao, Aguson del Norte 2 l1l 156.0 0.296 0.308 0.311 0.32 0.322 0.0009 Makiling, Laguna 2 66

~

191.0 0.305 0.318 0.321 0.33 0.332 0.0009 Species Average

I 173.5 0.301 0.313 0.316 0.32 0.327 0.0009

llang-ilang !Cananga odora/a (lomk.) Makiling, Laguna 7 354 225.3 0.291 0 .303 0.305 0.31 0.316 o.oooa-Hook. f. & Thoms)

I • ..... Koatoon-bongkal 1Anthocephalus Mokiling, Laguna

~~~-

8 410 173.2 0.332 0.348 0.351 0.36 0.365 0.0011 chinensis !Lamk.) A. Rich ex Walp.I

Kapok !Cei/XJ pentandra (l.) Gaertn.J Makiling, Laguna 3 99 344.6 0.226 0.233 0.235 0.24 0.241 0.0005 -

Katurai [Sesbanio grondiflora (l..) Pers.) Aguilar, Pangasinan l 90 184.4 0.397 0.419 0.424 0.44 0.445 0 .0017

Lumbang IA/euriles moluccana IL.I Willd.J Makiling, Laguna 2 116 314_9 0.246 0.254 0.256 0.26 0.264 0.0006

-1 2 3 "' s 6 7 8 '9 111 111

Malapopaya lPofydas nodosa (HlumeJ Gumaca, Quezon 6 91 193.5 0.358 0.376 0.380 0 .39 0.396 0.0013 Seem.] Moklllng, Laguna 3 31 159.l 0.377 0.397 0.402 0.41 0.420 0.0015

Species Average 176.3 0.368 0.387 0.391 0.40 0.408 O.OOM

Moluccan sou [Paraserianthes fa/cafaria Nasipit, Agusan del Norte l 2 l92.9 0.250 0,259 0.262 0.27 0.268 0.0006 (L) Nielsen) Acoje, Zambales l 36 239.4 0.253 . 0..262. 0.264. 0.27 . 0.272 0.0006

Species Average 216.2 0.252 0.261 0.263 0.27 . 0.270 0.0006

Spanish cedar (Cedrela odorata l.l Makiling, Laguna l 18 170.4 0.384 0.405 0.409 0.42 0.428 0.0015

Tulip, Atrican (Spathodea campanu/ata Makiling, Laguna 4 127 265.7 0 .245 0.253 0.255 0.26 0.262 0.0006 Beauv.l

\ -

FPRDI TRADE BULLETIN SERIES

EDITORIAL STAFF

Editor Editorial Assistants

Editorial Adviser

EDITORIAL BOARD

Chairperson Vice Chairperson Members

TECHNICAL ADVISERS

Dr. Florence P. Soriano Di red or

Rizalina K. Araral Felisa M: Talatala Gloria 0. Santos Emerita R. Barile

For. Arsenio B. Ella Emerita R. Barile Carolyn Marie C. Garcia Rico J. Cabangon Rizalina K. Araral Ma. Socorro R. Dizon Rebecca B. Lapuz Josephine P. Carandang

For. Dominador S. Alonzo Depuly Director

Produced by the

Communication Materials Production and Documentation Section

Information and Communication Technology Staff February 2005