Matthiola.'] vi. crucifers: arabide.e. 
23 
5. Akabis. Pods compressed, long, linear; valves 1 -nerved, or with 
several longitudinal coarse veins. Seeds in one row. Cot. o=. 
4. Turritis. Pods compressed, long, linear ; valves 1 -nerved. Seeds 
in two rows. Cot. o=. 
12. Draba. Pods compressed, oblong ; valves 1 -nerved. Seeds in 2 
rows. Cot. o=. 
3. Barbarea. Pods linear, 4-angled ; valves 1-nervcd. Seeds in a 
single row. Cot. o=. 
8. Nasturtium. Pods oblong or linear, terete ; valves very convex, 
reticulately veined, nerveless. Seeds irregularly in 2 rows. 
Cot. o=. 
19. Sisymbrium. Pods linear, terete, or slightly angled ; valves 3- (or 
rarely 1-) nerved. Seeds not striated; stalks slender. Calyx 
slightly spreading. Cot. o||. 
20. Alliaria. Pods long, linear, terete ; valves slightly 3-nerved. 
Seeds striated; stalks broad. Cot. o||. 
21. Erysimum. Pods linear, 4-angled; valves 1 -nerved. Seed-stalks 
slender. Calyx erect. Cot. o||. 
ft Calyx conspicuously bisaccate at the base. Valves of pod nerved. 
21. Erysimum. Stigma nearly simple. Pod 4-angled. Cot. o||. 
2. Cheiranthus. Stigma on a style, lobes patent (or capitate). Cot. 
o=. 
1. Matthiola. Stigma sessile, lobes connivent, either thickened or 
horned at the back. Cot. o=. 
18. Hesperis. Stigma nearly sessile; lobes elliptical, obtuse, conni- 
vent. Cot. o||. 
18 a . Malcolmia. Stigma conical acute. Pod cylindrical. Cot. o||. 
** Style forming a stout conical, often seed-bearing beak. Cot. o». 
28. Brassica. Calyx erect. Pod terete or angled. Seeds in a single 
row, globose. 
29. S inapis. Calyx spreading. Pod terete or angled. Seeds in a single 
row. 
30. Diplotaxis. Calyx spreading. Pod compressed. Seeds in two 
rows. 
D. Fruit without valves or a dissepiment. 
33. Raphanus. Fruit divided transversely into several 1-seeded joints. 
Calyx erect. Cot. o». 
Sub-Ord. I. PLEURORHIZiE. Cotyledons accumbent. (o=) 
Tribe I. A rabidly. Pod elongated ; valves flat , concave, or 
slightly heeled : dissepiment narrow, in the broadest diameter. 
Cot. o=(Gen. 1 — 8.) 
1. Matthiola Br. Stock. 
Pod (rounded or compressed) crowned with the connivent 2- 
lobed stigma, the lobes either thickened at the back 1 2 or with a 
1 Some species of Draba almost agree with this character. 
2 It often happens, when this is the case, that the radicle is slightly twisted so 
as to he applied to the back of the cotyledons ; but, as they are parallel to the dis- 
sepiment, they are really accumbent. 
