GREEN STREET STEWARDS Weed Identification Guide REVISED ON MAY 2017 Green Street Stewards: Weed Identification Guide UPDATED: MAY 2017
AMARANTH 1 FIELD BINDWEED 18 BITTERCRESS 2 HIMALAYAN BLACKBERRY 19 BLACK MEDIC 3 LAMBSQUARTER 20 CANADA THISTLE 4 LONDON ROCKET 21 CATCHWEED 5 MOUSE-EAR CRESS 22 CHICORY 6 MULLEIN 23 COMMON CHICKWEED 7 NIGHTSHADE 24 COMMON GROUNDSEL 8 NIPPLEWORT 25 COMMON MALLOW 9 PRICKLY LETTUCE 26 COMMON VETCH 10 PROSTRATE KNOTWEED 27 CREEPING WOODSORREL 11 RED SORREL 28 DANDELION 12 ROBERT GERANIUM 29 DEADNETTLE 13 SOWTHISTLE 30 DOCK 14 TRAVELER’S JOY 31 DOVEFOOT GERANIUM 15 WHITE CAMPION 32 ENGLISH IVY 16 WILD CARROT 33
CONTENTS FALSE DANDELION 17 WILLOWHERB 34
www.portlandoregon.gov/bes early plant AMARANTH Amaranthus spp.
flowering
DIGDIG
MORE INFORMATION: OSU Weed Identification Guide–Amaranthus
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 1 BITTERCRESS Cardamine spp.
early plant
PULL
MORE INFORMATION: http://mint.ippc.orst.edu/bittercress.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 2 BLACK MEDIC Medicago lupulina
early plant
flowering and seed
DIG
MORE INFORMATION: mature plant with www.ipm.ucdavis.edu/PMG/WEEDS/black_medic.html flower and seed
PREVIOUS MAIN NEXT WEED MENU WEED 3 CANADA THISTLE Cirsium arvense
early plant
flowering
DIG
MORE INFORMATION: http://mint.ippc.orst.edu/canthistle.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 4 CATCHWEED Galium aparine
early plant
flowering
PULL
MORE INFORMATION: http://mint.ippc.orst.edu/catchbedstraw.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 5 CHICORY Cichorium intybus
early plant
seeds flower
DIG
MORE INFORMATION: plants.usda.gov/core/profile?symbol=CIIN
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 6 COMMON CHICKWEED Stellaria media
early plant
flower
PULL
MORE INFORMATION: http://mint.ippc.orst.edu/chickweed.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 7 COMMON GROUNDSEL Senecio vulgaris
early plant
flowering with seeds
PULL
MORE INFORMATION: http://mint.ippc.orst.edu/groundsel.htm
NEXT PREVIOUS MAIN 8 mature plant WEED MENU WEED COMMON MALLOW Malva neglecta mature plant
early plant
flowering
DIG
MORE INFORMATION: http://montana.plant-life.org/index.html
PREVIOUS MAIN NEXT WEED MENU WEED 9 COMMON VETCH Vicia sativa
early plant
flowering
seeds
PULL
MORE INFORMATION: http://www.pnwflowers.com/flower/vicia-sativa
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 10 CREEPING WOODSORREL Oxalis corniculata
early plant
seeds
DIG
yellow flowers MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/ creeping_woodsorrel.html
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 11 early plant DANDELION Taraxacum officinale
seeds
DIG
MORE INFORMATION: OSU Weed Identification Guide–Dandelion
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 12 DEADNETTLE Lamium purpureum
early plant
flowering
PULL
MORE INFORMATION: OSU Weed Identification Guide–Dead Nettle
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 13 early plant DOCK Rumex spp.
seeds
DIG
MORE INFORMATION: plants.usda.gov/core/profile?symbol=RUCR
flower PREVIOUS MAIN NEXT WEED MENU WEED 14 DOVEFOOT GERANIUM Geranium molle
early plant
flowering
DIG
MORE INFORMATION: OSU Weed Identification Guide–Dovefoot Geranium
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 15 ENGLISH IVY Hedera spp.
early plant
seeds
DIG
MORE INFORMATION: www.portlandoregon.gov/parks/article/201781
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 16 FALSE DANDELION Hypochaeris radicata
early plant
seeds
DIG
MORE INFORMATION: www.iewf.org/weedid/Hypochoeris_radicata.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 17 FIELD BINDWEED Convolvulus arvensis
early plant
flowering
PULL
MORE INFORMATION: http://mint.ippc.orst.edu/fbindweed.htm
flowering mature plant PREVIOUS MAIN NEXT WEED MENU WEED 18 HIMALAYAN BLACKBERRY early plant Rubus discolor
seeds
DIG
MORE INFORMATION: http://www.pnwflowers.com/flower/rubus-discolor
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 19 LAMBSQUARTER Chenopodium spp.
early plant
flowering
DIG
MORE INFORMATION: mint.ippc.orst.edu/broadleaf.htmwww.ipm.ucdavis.edu/PMG/WEEDS/ lambsquarters.html
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 20 LONDON ROCKET Sisymbrium spp.
early plant
flowering
PULL
MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/london_rocket.html
mature plant
PREVIOUS MAIN NEXT WEED MENU WEED 21 MOUSE-EAR CRESS early plant Arabidopsis thaliana
flowering
PULL
MORE INFORMATION: OSU Weed Identification Guide–Mouse-ear Cress
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 22 MULLEIN Verbascum spp.
early plant
flowering
DIG
MORE INFORMATION: www.cal-ipc.org/ip/management/plant_profiles/ Verbascum_thapsus.php
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 23 NIGHTSHADE Solanum spp.
flowering with purple berries
mature plant with white flowers
flowering with berries
DIG
MORE INFORMATION: http://ipm.ucanr.edu/PMG/WEEDS/black_ nightshade.html
PREVIOUS MAIN NEXT mature plant with purple flowers WEED MENU WEED 24 NIPPLEWORT Lapsana communis
early plant
flowering
PULL
MORE INFORMATION: OSU Weed Identification Guide–Nipplewort
PREVIOUS MAIN NEXT mature plant WEED MENU WEED 25 PRICKLY LETTUCE early plant Lactuca serriola
flowering with seeds
DIG
MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/prickly_lettuce.html
PREVIOUS MAIN NEXT mature plant WEED MENU WEED 26 PROSTRATE KNOTWEED Polygonum aviculare
early plant
flowering
DIG
MORE INFORMATION: http://mint.ippc.orst.edu/pknotweed.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 27 RED SORREL Rumex acetosella
mature plant
early plant
flower/seeds
DIG
MORE INFORMATION: http://mint.ippc.orst.edu/redsorrel.htm
PREVIOUS MAIN NEXT WEED MENU WEED 28 ROBERT GERANIUM Geranium robertianum
early plant
flowering with seeds
PULL
MORE INFORMATION: OSU Weed Identification Guide–Robert Geranium
flowering mature plant PREVIOUS MAIN NEXT WEED MENU WEED 29 SOWTHISTLE Sonchus spp.
early plant
seed
flowering
DIG
MORE INFORMATION: www.iewf.org/weedid/Sonchus_oleraceus.htm
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 30 TRAVELER’S JOY Clematis vitalba
early plant
seeds
DIG
MORE INFORMATION: www.pnwflowers.com/flower/clematis-vitalba
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 31 WHITE CAMPION Silene spp.
early plant
flowering
DIG
MORE INFORMATION: http://www.oardc.ohio-state.edu/weedguide/single_ weed.php?id=19
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 32 WILD CARROT Daucus carota
early plant early plant
seed
DIG
MORE INFORMATION: OSU Weed Identification Guide–Wild Carrot
flowering
mature plant PREVIOUS MAIN NEXT WEED MENU WEED 33 early plant WILLOWHERB Epilobium spp.
flowering seeds
PULL
MORE INFORMATION: www.ipm.ucdavis.edu/PMG/WEEDS/willowherbs.html
PREVIOUS MAIN NEXT mature plant WEED MENU WEED 34 Green Street Stewards: Weed Identification Guide
[email protected] www.portlandoregon.gov/bes/GreenStreetStewards
©City of Portland Bureau of Environmental Services WS 1735 MAY 2017
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