COI.ORADO AGRICUI.TURAI. COGGEGE 
Seeds grooved 
Seeds with two longi- 
tudinal grooves on 
each face; seeds oval 
in cross-section, .6-. 8 
mm. long, regular in 
13. .BRASSICACEAE (Bursa) 
Seeds with one distinct 
longitudinal groove; 
seeds nearly circular 
in cross-section, .6-1.3 
mm. long, irregular 
in shape 13. . BRASSICACEAE 
Seeds not oblong in shape (Sisymbrium) 
Seeds wedge-shaped, round- 
ed on one edge, notch- 
ed on the other; seeds 
marked with irregular 
blister-like proturber- 
9. . ALSINACEAE 
(Cerastium) 
Seeds not wedge-shaped 
Seeds turbinate in shape, 
black, shiny 1..GRAMINEAE 
Seeds not turbinate in (Panicularia) 
shape 
Seeds fusiform in shape 
Seeds with a long, 
slender, hooked 
tip, hairy at the 
base 15..ROSACEAE (Geum) 
Seeds without a long, 
slender, hooked 
tip 
Seeds with a dis- 
tinct point or 
beak at the 
apex; seeds 
3-8 veined 34 . . CICHORIACEAE 
Seeds not pointed (Lactuca) 
or beaked at 
the apex; seeds 
truncate; seeds 
veined or rib- 
bed 34 - CICHORIACEAE 
^ ^ . (Sonchus) 
speeds not fusiform in 
shape 
Seeds pyriform in 
shape, 2-3 ribbed 
or veined 32 . . AMBROSIACEAE 
Seeds not pyriform 
in shape 
Seeds cuneate in 
shape 32. .AMBROSIACEAE (Iva) 
Seeds narrowly 
campanulate in 
shape 33 . . COMPOSITAE 
(Ratibida) 
