24 | CRUCIFERZ, (MUSTARD FAMILY.) 
Synopsis. , 
I. SILIQUOSZE. Fruit a silique, few — many-seeded. 
* Cotyledons flattened, parallel with the partition, one edge applied to the ascending radicle 
(accumbent). 
+ Valves of the fruit nerveless. 
1. NASTURTIUM. Silique short, nearly terete. Seeds in two rows in each cell. 
2. IODANTHUS. Silique elongated, terete. Seeds ina single row in each cell. 
8. CARDAMINE, Silique linear, compressed. Seeds Wingless, in a single row. 
4. DENTARIA. Silique lanceolate, compressed. Seeds wingless, in a single row. 
5. LEAVENWORTHIA. Silique oblong. Seeds Winged. Embryo straight. 
+ + Valves of the fruit 1-nerved. 
6. ARABIS. Silique linear, elongated ; valves flattened. 
* * Cotyledons flat, with one edge turned toward the partition, and the back of one of them 
applied to the ascending radicle (incumbent). 
7. SISYMBRIUM. Silique sessile, nearly terete. 
8. WAREA. Silique stalked, compressed. Petals on long claws. 
IL SILICULOSH. Fruit a silicle. 
* Silicle compressed parallel with the broad partition, or globular. 4 
*- Cotyledons accumbent. 
9. DRABA. Silicle oval or oblong, many-seeded valves 1 — 9-nerved. 
10. VESICARIA. Silicle orbicular, few-seeded : valves nerveless. 
+ + Cotyledons incumbent. 
11. CAMELINA. Silicle obovoid : valves 1-nerved. 
* % filiele compressed contrary to the narrow partition. Cotyledons incumbent, rarely — 
accumbent. : 
12. SENEBIERA. Valves of the silicle globular, rugose : seeds solitary. 
13. LEPIDIUM. Valves of the silicle boat-shaped ; seeds solitary. 
34 CAPSELLA. Valves of the silicle boat-shaped : seeds numerous. 
IT. LOMENTACE®. Fruit separating transversely into joints. 
15. CAKILE. Fruit 2-jointed. E E : 
1 NASTURTIUM, R. Br. WATER-CRESS. 
Silique nearly terete, linear or oblong, or short and silicle-like, usually curved 
upward ; the valves nerveless. Seeds numerous, small, in two rows in each cell, 
not margined. Cotyledons accumbent.— Herbs. Leaves pinnately-lobed. Flow- 
ers white or yellow, small. 
1. N. tanacetifolium, Hook. & Arn. Smooth; stems diffuse; leaves 
pinnately divided, with pinnatifid or toothed lobes 3 silique oblong-linear, pointed 
with the short style, twice as long as the pedicel. (Sisymbrium, Wait. S. Wal- 
teri, Ell.) — Damp soil, East Florida to South Carolina, and westward. March 
and April — Stems 6/-12'long. Flowers minute, yellow. geox 
2. N. sessiliflorum, Nutt. Smooth; stem stout, ere branching 
oblong-obovate, pinnatifid toward the base, Giaa n dos , 
ary- April @— Stem19 minuté, yellow, ipis 
