CRUCIFERZ. 37 
TRIBE tv. Fruit longitudinally : 2-celled, dehiscent, elongated, 
terete or prismatic or compressed parallel to the partition. 
22 Thely odium. Pods slender, terete or quadrangular, often torulose, 
on a short thick stipe: valves 1-nerved: cotyledons incumbent. 
23 Stanleya. Pods terete or subterete, on a slender elongated stipe: valves 
1-nerved : cotyledons incumbent. 
TriBe v. Pods short, scarcely longer than broad, turgid or ob- 
compressed. Cotyledons incumbent. 
24 Braya. Pods oblong to linear-oblong with flattish or convex faintly- 
nerved but not keeled valves. 
25 Camelina. Silicle obovoid, 2-celled ae, many-seeded, with somewhat 
firm strongly convex valves, and thin obovate partition. 
26 Subularia. Silicle turgid, subglobose, pyriform or short fusiform, 
dehiscent, several-seeded: cotyledons incumbent: aquatic herbs with 
subulate leaves. 
TRIBE vI_ Pods long or short, ae ai their whole length or 
the apex indehiscent Cotyledons longitudinally conduplicate. 
27 Brassica, Pods slender and longitudinally dehiscent to near the apex. 
Serres u. Pods short, dehiscent their whole length. Valves 
more or less obcompressed, the partition usually narrow. 
Trpe vit. Pod a 2-celled silicle, strongly obcompressed or 
turgid. Pubescence wholly simple or none. 
28 Bursa. Pods obcordate, reversed deltoid in outline. 
22 Hutchinsia. Pods elliptical, entire at the apex. 
30 Coronopus. Pods more or less distinctly didymous with thickish 
valves, falling off as closed or nearly closed 1-seeded nutlets: terres- 
trial herbs but growing in wet places. 
31 Lepidium. Pods strongly obcompressed; with usually 1 ineeded cells: 
cotyledons incumbent. Terrestrial herbs. 
32 Thlaspi. Pods strongly obcompressed, dehiscent; cells 2 to several 
seede : cotyledons accumbent. Glabrous terrestrial herbs. 
Series 1. Pods short, [rarely long], usually crustaceous and 
indurated, indehiscent, 1-2-celled, with 1-2 seeds in each cell. 
TrispE rx. Pods orbicular to elliptical. Ovule suspended. 
33 Heterodraba. Pods short-elliptical, twisted, not margined, very tardi- 
ly dehiscent, by a very filmy partition 2-celled. 
34 Athysanus. Pods orbicular, not margined, uncinate-hispid, indehis- 
cent: ovary 1-celled, 3-4-ovuled but only one maturing. 
35 Thysanocarpus. Pods orbicular to obovate, wing-margined, 1-celled 
indehiscent: ovary 1-oyvuled : pubescence simple. 
SERIES tv. Pods elongated, indehiscent, 1-celled and many- 
seeded, or many-celled with 1 seed in each cell. 
TRIBE X. ~ Pods elongated, terete or ‘somewhat prismatic, often 
torose, multicellular and indehiscent. 
36 coidecmig Fruit an indehiscent multicellular or transversely divid- 
ed pod. 
