Colorado Weed Seeds 
9 
f-f-Seecls flattened on one side; 
seeds cylindi’ical to oblong 
in shape 
Seeds with a single groove 
on each side; seeds 1.5-2. 8 
long, obscurely flattened, 
color brown 13 . .BRASSICACEAE 
^ ^ (Camelina) 
Seeds not grooved; seeds dull, 
granular, yellow in color, 
distinctly flattened 24 . .CUSCUTACEAE 
(Cuscuta) 
Seeds not flattened 
Seeds conical in shape 
Seeds shiny, stony, pitted, trun- 
cate 
,25 
Seeds dull, smooth, rounded at 
the apex; seeds with one 
longitudinal groove on each 
side 
r. Seeds not conical in shape 
J. Seeds oblong to cylindrical 
in shape 
Seeds not circular in cross- 
section; seeds obscurely 
4-5 angled 
Seeds honey-yellow in 
color 33. 
Seeds usually brown in 
color 33. 
Seeds circular in cross-sec- 
tion thruout 
Seeds constricted by two 
grooves, which form a 
longitudinal rounded 
ridge 13. 
Seeds not constricted by 
two grooves 
Seeds reticulated or pit- 
ted 1"^ * 
Seeds not reticulated or 
pitted 
Seeds distinctly ribbed 
or ridged longitu- 
dinally 
Ribs white, usually 
10 in number, 
smooth 33 
Ribs of the same 
color as the seed, 
roughened with 
rounded projec- 
tions 33 
Seeds only faintly 
wrinkled or ribbed 
Seeds dull, summit 
bearing a light-- 
colored disk.... 33 
.BORAGINACEAE 
(Lithospermum) 
GRASSICACEAE 
(Lepidium campestre) 
COMPOSITAE 
(Grindelia) 
COMPOSITAE 
(Carduus) 
BRASSICACEAE 
(Conringia) 
.GERANIACEAE 
( Geranium) 
.COMPOSITAE 
(Leucanthemum) 
.COMPOSITAE 
(Anthemis) 
, COMPOSITAE , 
(Artemisia) / 
