Colorado Agricultural College 
lO 
Seeds shiny, trun- 
cate; apex cup- 
like with a point 
in the center . . . 33 . . COMPOSITAE 
r Cl 1 , (Carduus) 
J. Seeds not oblong- in shape 
K. Seeds fusiform in shape, 
not sircular in cross-sec- 
tion thruout 
Seeds smooth or nearly so, 
4-8 angled or ribbed 
at the apex; circular in 
cross-section at base, 
somewhat resembling a 
ten-pin 22 . . ONAGRACEAE (Gaura) 
Seeds roughened with hard, 
sharp points near the 
apex; seeds circular in 
cross-section at the 
apex, 4-angled or rib- 
bed at the base 34 . .CICHORIACEAE 
(Taraxacum) 
K. Seeds not fusiform in 
shape 
L. Seeds pointed at both 
ends; seeds cylindrical 
Seeds tailed at the ends 
and often thruout 
one side; seeds ad- 
hering to each other 
in groups of 4-6.... 3 . . JUNCACP2AE (Juncus) 
Seeds not tailed at the 
ends or on one side 
Seeds .4-. 6 mm. long, 
reticulated 1 . . GRAMINEAE 
Seeds .5-1.5 mm. long, (Eragrostis) 
not reticulated; 
seeds often with 
black mark at the 
•^3-se 1.. GRAMINEAE 
(Sporobolus) 
L. Seeds not pointed at 
both ends 
‘in 1 
ire .“'O 
cpcnes, 
\ -Seec 
aVia. 
M. Seeds boat-shaped .. 30 PEANTAGINAGEAE 
-M. Seeds not boat-shap- (Plantago) 
ed; seeds trapeziums 
in outline, frustrums 
of spherical jiyramids 
in shape 30 . . PEANTAGINAGEAE 
( Plantago) 
Lie KEY 4'() PV.MILIES, “SEEDS’ 
re rei erred to as such because the;. 
called in commercial samples.. Thus all fruits whether utricles 
caryopses or true seeds are called seeds. 
Is triangular in cross-section occasionally occur in Polygonum persic- 
