194 
4p Fruit somewhat flattened contrary to the partition, or columnar 
—F 
~ sometimes 4-angled PO aie 
‘ y 2 y" pa 
Fruit tapering into a seedless beak oO , det 13, Brassica 
LL 
. Fruit teperine-es-even=bet not beaked eat by the short style 
=~ 
Fruit distinctly tapered toward the apex proper 
(O° Caespitose perennials 15-20 cm, tall, hoary 
14, Smelowskia 
ty, ey green annuals 30-60 cm, tall or more 15, 
Sisymbrium 
Fruit See, "ii olniees throughout or sometimes thicker above 
‘awe 
QO Fruit 0.5-1.5 om, long 
’, Pubescence of simple hairs 16. Radicula 
'*. Pubescence of forked or branching hairs 
( 
17. Descurainka 
») Fruit 2-10 cm, long 
_ Fruit 4-angled 
4 Herbage glabrous 18. Barbarea 
‘+ Herbage pubescent with closely appressed 
(© Porked hairs attached centrally 
196 Erysimm 
» Fruit terete or columar 
/4 Pubescence of simple hairs 15. Sisymbrium 
Pubescence of forked or branching hairs 
t 
iv. Descurainga 
2s 
