Coi,oRADo Wkkd Sheds 
4. False Flax 
iCaiiielina Crantz.) 
49 
Pods circular in cross-section, ranging 
from almost spherical to cylindrical in shape ; 
seeds numerous, oblong, swollen or inflated. 
False Flax {Camelina sativa (L.) 
Crantz.) (Fig. 79).— Seeds tawny to San- 
ford’s-brown in color, irregularly oblong to 
cylindrical in shape, circular in cross-section ; 
two distinct deep grooves (one on each side) 
constrict the seed nearly its length resulting 
in a rounded ridge, which often projects, lip- 
like, beyond the hilum; seeds 1.5-2.8 mm. 
long, .8-1.5 mm. wide, in the widest part. 
5. Hare*s-ear Mustard 
{Conringia (Heist.) Link.) 
Pod long and narrow, usually 4-angled ; seeds oblong. 
Hare’s-ear Mustard (Conringia orientalis (L.) 
Diim.) (Fig. 80).— Seeds auburn color, usually oblong 
to cylindrical in shape, circular in cross-section, con- 
stricted by less distinct grooves but otherwise ridged as 
in Camelina sativa, the distinct lip-like projection 
usually extending beyond the hilum; surface of seed 
marked with shallow, minute pits; seeds 2-2.5 mm. long, 
1.2-1.5 mm. wide in the widest part. 
6. Hedge Mustard, Tumbling Mustard 
(Sisymbrium (Tourn.) L., Erysimum L., Norta Adans.) 
Pods either awl-shaped or cylindrical, circular in cross-section, or 4-6 
sided; seeds numerous, cylindrical, conical or irregular in shape. 
Key to Species 
Color raw-sienna to antique-brown altissimum 
Color bone-brown to hazel 2..S. officinale 
1 . Tumble or Tumbling Mustard (Sis- 
ymbrium altissimum L., Norta altissima (L.) 
Britton.) (Fig. 81).— Seeds raw-sienna to an- 
tique-brown in color, nearly circular in cross- 
section usually with one groove nearly as long 
as the seed ; seeds .7-1 mm. long, .4-.G mm. wide. 
Fig. 81. Tumble 
Mustard (Sis- 
ymbrium altis- 
simum). a. & b. 
Top view. c. Edge 
view. X 1 4. 
Fig. 80. Hare’s- 
ear Mustard (Con- 
ringia orientalis). 
X 10. 
Fig. 79. False Flax (Camel 
ina sativa). a. Top view. b. 
Side view, x 16. 
