Post on 18-Jan-2017
Robert Emanuel
Water Resources Project Manager, Clean Water Services
October 12, 2013
WASHINGTON COUNTY & TUALATIN BASIN
INVASIVE SPECIES
KEYS TO IDENTIFYING THE INVADERS
• Flowers
• Leaves and stems
• Habit (vine, herb, grass, rosette, etc.)
• Key characteristics (odor, reflectivity, color)
• Developing a “search pattern”
Looking down as you
walk, can you see the
plant’s pattern among
the others?
SPRING
Glenn M
iller, OD
A
Garlic Mustard: Alliaria petiolata
Glenn M
iller, OD
A
Glenn M
iller, OD
A
Elizabeth J. C
zarapata
Glenn Miller, ODA
7-15’ tall
2-4’ tall
SUMMER
Yellow Flag Iris Iris pseudacorus
Ph
oto
: Jud
y Scott, O
SU
Emily DeBolt
Purple Loosestrife
Purple Loosestrife
Gle
nn M
iller
, OD
A
Giant Knotweed Fallopia sachalinese
EXTRA CREDIT
Carla Cole, NPS
Spurge Laurel: Daphne laureola
Carla Cole, NPS
Tania Siemens, TNC
Carla Cole, NPS
Yellow Archangel Lamiastrum galeobdolon
Ph
oto
s: WA
State Wee
d C
on
trol B
oard
Yellow Archangel Lamiastrum galeobdolon
Italian Lords and Ladies Arum italicum
Italian Lords and Ladies Arum italicum
Lesser Celandine Ranunculus ficaria
Lesser Celandine Ranunculus ficaria
TRUE AQUATICS
REPORTING YOUR FINDS
www.oregoninvasiveshotline.org
Only YOU can prevent
the invasion!
DON’T BE A VECTOR!
• Clean your clothes
• Clean your pets
• Clean your equipment & vehicle
• Walk around the infestation
• Bag/trash, burn, no compost
• If collecting voucher in flower or fruit, seal it
J.K. Linsey
QUESTIONS?
Partners for a Weed-Free Tualatin Basin: