Weld County Field Guide – Native Annuals 1 The pictures below are only for providing identifying features of misidentified annual weeds in Weld County. Annual Pricklypoppy have white flowers and yellow sap when broken open. Annual pricklypoppy leaves have spines and blue green color with white veins. Annual pricklypoppy seed heads. Common cocklebur seedlings Common cocklebur larger plants Common cocklebur seeds on the bottom, wild licorice seeds on top Buffalobur – has yellow flowers Buffalobur – is very spiny Buffalobur rosettes look like small oak leaves when they first germinate in mid summer Jan Samanek, State Phytosanitary Administration, Bugwood.org David J. Moorhead, Univ. of Georgia, Bugwood.org Southwest Colorado Wildflowers, Al Schneider E. Marx Easterncoloradowildflowers.com Southwest Colorado Wildflowers, Al Schneider
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Weld County Field Guide Native Annuals 1 · Weld County Field Guide –Native Annuals 1 The pictures below are only for providing identifying features of misidentified annual weeds
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Weld County Field Guide – Native Annuals 1The pictures below are only for providing identifying features of
misidentified annual weeds in Weld County.
Annual Pricklypoppy have
white flowers and yellow
sap when broken open.
Annual pricklypoppy leaves have
spines and blue green color with
white veins.
Annual pricklypoppy seed
heads.
Common cocklebur seedlingsCommon cocklebur larger plants
Common cocklebur seeds on the
bottom, wild licorice seeds on top
Buffalobur – has yellow
flowers
Buffalobur – is very spiny Buffalobur rosettes look like small oak
leaves when they first germinate in
mid summer
Jan S
am
anek, S
tate
Phyto
sanitary
Adm
inis
tratio
n, B
ugw
ood.o
rg
David J. Moorhead, Univ. of Georgia, Bugwood.org
Southwest Colorado Wildflowers, Al Schneider
E. M
arx
E
aste
rncolo
radow
ildflo
wers
.com
South
west
Colo
rado W
ildflow
ers
, A
l S
chneid
er
For assistance in dealing with these weeds and noxious weeds
go to www.weldweeds.org or call 970-304-6496 ext. 3770