BOT 155 FIELD BOTANY
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Transcript of BOT 155 FIELD BOTANY
BOT 155 FIELD BOTANY
Trees
Herbs (Wild Flowers)
Vines
Shrubs
Enlightenment !!
A plant with a weak stem that derives support from climbing, twining, or creeping along a surface
A plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
A woody plant smaller than a tree, and usually with several stems from the same base
A tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
Herb or Wildflower
Vine
Shrub
Tree
Organs• Stems • Leaves &
Reproductive Structures
• Roots
Trees and Shrubs
Roots
Trunk (Main Stem)
Crown (Lateral Branches + Leaves + Reproductive Units)
Leaves
• All leaves originate as primordia at the apex of a stem
Variation in Leaves
• Number of leaflets
• Venation• Pattern of
attachment on stem
Leaves• At maturity, most leaves have a stalk
(petiole) and a flattened blade (lamina) with a network of veins (vascular bundles).
Leaves
• Simple (single blade) • Compound (divided
into leaflets).– Palmately compound
leaflets attached at the same point at end of petiole
– Pinnately compound leaflets in pairs along the rachis
– Bipinnately compound leaflets subdivided further
Notice location of axillary bud
Simple Compound
Narrowly PointedBroadly Pointed
Broadly Pointed
Bristle tipped
SquareRounded
Narrowly Pointed Rounded
EntireUndulate(Wavy)
Finely Serrate Finely Serrate
Coursely Serrate
Coursely Serrate
Doubly Toothed
Pinnately Lobed Pinnately Lobed
Pinnately Lobed Palmately Lobed
Finely SerrateEntire
NarrowlyWedge-shaped
BroadlyWedge-shaped
BroadlyWedge-shaped
Square Heart-shaped Oblique
Rounded
Linear
Oval
Ovate Obovate
Lance-shaped
Heart-shaped Deltoid(Triangular)
Elliptical
Oblong
LinearLinear
Needle-like
Scale-like
Scale-like
Awl-like