36 CRUCIFERZ. 
8 Nasturtium. Pods short, turgid, little compressed, nerveless. 
Roripa. Pods terete or nearly so, with nearly or quite nerveless, thin 
valves. . 
Barbarea. Pods linear, elongated, somewhat tetragonal: seeds in 1 
row in each cell. . 
Arabis. Pods linear with more or less 1-nerved flat valves and thin 
partition: seeds in 1 row ineach cell, flattened and more or less winged. 
Or te 
“OQ 
* * * Pods oblong or linear, compressed parallel to the partition, sessile. 
Streptanthus. Pods oblong,to narrowly linear, compressed parallel to 
the partition, sessile upon the enlarged receptacle: valves flat, nerve- 
less, seeds flat, more or less winged: cotyledons accumbent. 
3 Caulanthus. Pods narrowly linear, somewhat flattened or subterete, 
sessile: valves l-nerved and often reticulate-veined: cotyledons incum- 
bent. . 
9 Dentaria. Pods linear, with nerveless flat valves and nerveless 
partition : seeds in 1 row in each cell wingless. 
10 Cardamine. Pod linear with thin flat nerveless valves, and wingless 
seeds in 1 row in each cell. 
~I 
i°2) 
TRIBE It. Pod a silicle, 2-celled, completely dehiscent, strongly 
compressed parallel to the broad partition or very turgid with 
broad partition and almost hemispherical valves, or didymous, or 
strongly obcompressed. Pubescence stellate. 
* Pods strongly compressed parallel to the broad partition. 
11 Platyspermum. Podssuborbicular, very strongly compressed parallel 
to the broad partition: seeds in 2 rows in each cell, broadly winged. 
* * Pods turgid with broad partition. 
12 Lesquerella. Pods subglobose: partition suborbicular: seeds flattened 
** * Pods didymous with narrow partition. 
3 Physaria. Silicle didymous or obcompressed, partition narrow-ellip- 
tical : cells several-seeded. 
* *** Fruit orbicular or nearly so, 2-celled, dehiscent, 2-several-seeded : 
- filaments often dilated and toothed or appendaged near the base. 
14 Psilonema. Capsule with valves convex, pubescence stellate. 
** * * Fruit oblong elliptic or lanceolate, rarely linear, 2-celled, 
dehiscent, 2-sveral-seeded: stamens unappendaged. 
15 Erophila. Flowers white: petals deeply 2-lobed or parted: pods linear 
to oblong, many-seeded. 
16 Draba. Sepals short and broad, equal at the base: petals entire or 
emarginate. 
17 Coehlearia. Pods (in ours) very turgid and appearing obcompressed, 
with distinctly 1-nerved valves. 
TriBE 1. Pods longitudinally 2-celled, dehiscent, from linear 
to lance-oblong or elliptic, always longer than broad. 
18 Sophia. Pods ascending or somewhat spreading, on slender pedicels, 
oblong-linear, subterete, less than an inch long. 
19 Erysimum. Pods subsessile, erect, appressed to the rachis, subulate. 
2) Smelowskia. Pods lanceolate to lance-oblong, more or less obcom- 
pressed with sharply keeled valves. 
21 Schenocrambe. Pods slender, terete, somewhat torulose. 
