Cruciferae, Mustard Family. 
Herbs with alternate and basal leaves » commonly pinnate or pinnatifid, some- 
times finely dissected, sometimes entire. Flowers perfect, regular, racemose or pan- 
iculate, without subtending bracts, Sepals 4, erect or spreading at anthesis, often 
colored like the petals, Petals 4, commonly with zg rotund or obovate blades t ering 
to a narrow claw, the blades exserted or included within the sepals, white, yellow 
or purple, Stamens normally 6, in 2 sets, the inner 4 longest. Ovary superior, 9 fiamele ed 
4 tt ft U4 be <P das had eh 
whet Fruits various, usually dahicatas inte 2 valves paying a Pa ect, membranous par- 
CL tbe i A Af on ow He ou esl 
tition (replum), or indehiscent, plump or einetonnd I steer parallel (60 Jor | contrary/+with> 
the partition, 
Key for plant$in fruit 
O fa.Fruit indehiscent 
2 Fruit columar but tapering upwards, beakeds; constricted between 
G& the seeds which are separated by spongy partitions l. Raphanus 
< Fruit rotund, very flat, l-seeded 
4 Fruit winged on the margin, the wing often perforated3 pub- 
Ae oe 
68 escence of simple hairs Ze Thysanocarpus 
4 Fruit not winged on the margins pubescence of forked hairs 
Se Athysanus 
me cornet 
O Ib Fruit dehiscent, separating into 2 valves, the ovules attached to the margin of the 
4 central erect partition 
Z a2aFruit rotund in outline, heart-shaped, oval or obovate, hardly more than twice 
as long as broad 
9aFruit strongly flattened contrary to the partition 
G Fruit broader than long, very flat, notched half way down to 
/O the base, pubescent (see also Lepidium, Draba) 
4. Physaria 
(Fruit longer than broad or rotund, shallowly notched or not at 
iO all, glabrous 
