XII. CRUCIFERZ. 
FIG. 40.—1. A flower of Sinapis nigra, 2. The stamens (4 long and 2 short) and pistil. 3. Plan of the 
flower,—stamens in 2 rows, outer row half wanting. 4. A silique,—s, partly open, showing the septum 
with seeds attached. 6.Cross section of aseed, cotyledons conduplicate (0 >>). 7. Flower (enlarged) and leaf 
of Capsella. 8. A silicle,—9, open, showing the narrow septum with seeds. 10. Cross section of a seed, 
cotyledons incumbent (0). 11. Section of a winged seed of Arabis Canadensis, cotyledons accumbent 01. 
Conspectus of the Genera. 
* Ornamental exotics not culinary. 
Silicle 5 Some of the stamens toothed. -  « Alyssum. 8 
2-celled. ¢Stamensalltoothless. . . ~. «. Lunaria. 9 
arora equal. Silicle 1-celled, 1-seeded. ‘ «ike hee ee ll 
Fruit siliculose; ¢ Petals unequal, the 2 outer ones larger. ees Ire. Re roar 10, 
, Stigma capitate. 2 8 ve a i Chetranthuse: 2 
‘poetn flat(O=). ¢ Stigmas cornute. Re Pere ty rt ey 
Fruit siliquose; Seeds ovoid <0ll). Calyx furrowed at base. . . . . . Hesperis. 18 
** Plants native or naturalized, and culinary exotics. 
: } 4—00-seeded. . . Thlaspi. 1 
( ovate and ae 2-seeded. . ; . Lepidiwn. 3 
compressed, ¢ entire at the apex. - _« Draba. 4 
yi { ovoid or Prd cauline. - + Cochlearia. 5 
. Silicle globose. Leaves radical. - + Subularia. 6 
Fruit jointless, ( triangular, cuneate at base. . . .» « «= Capsella. 2 
siliculose. ( Silicle with 2 joints, upper joint ovate orensiform. . . Cakile. 25 
Sds. not sar -. «+ Cardamine. 16 
bordered, 20!. . Stsymbrium. 19. 
Cheiranthus. 21 
Seedsina Pods linear. ( Seeds bordered. 
single row. ?Pods lanceolate. Leavesfew. . Dentaria. 17 
Valves Seeds ina ‘§wingless.=. | SRS Nasturtium. 12 
x veinless. . (double row, ?winged onthe margin. . 3 .- Turritis. 14 
Flowers | Fruit 
{ ‘ru Valves with one central vein, flat, linear. 
cyanic. (siliquose. 
Valves 0. Silique indehiscent, transversely celled. . Bee Raphanus. 26 
; Pods dehiscent. - Brassica. 24 
‘ globose. Pods indehiscent. . Raphanus. 26 
(Seeds ina oblong (0=). Leaves lyrate. . Barbarea. 13 
Calyx erect 5 single row, (oblong (0il). Leaves undivided. Erysimwm. 20 
: or closed. " Seeds ina doublerow.'..  . | « «6 =| eeepmmere. 14. 
Fruit Seeds ovoid oroblong (0ll). . . Sisymbriwm. 19 
siliquose. 
Calyx spreading. - . Seeds globose (0>>). . ‘ . Sinapis. 23. 
Flowers <r ae oblong or somewhat terete. ee ee Nasturtium. 12 
yellow. | Fruit siliculose, . . ?obovoidorsubglobose. . f : ° . Camelina. 7 
Section I. SELACULOSE. (§ 80, note.) 
1. THLASPI. Dill. 
Gr. §daw, to compress; on account of the compressed or flattened silicles. 
Calyx equal at base; petals equal; silicle short, flat, emarginate 
at the apex, many-seeded; valves carinate, often winged on the 
back ; cotyledons accumbent (0=).—Lws. undivided. Fils. white. 
1, T. arvense. Penny Cress. 
Lvs. oblong, coarsely dentate, smooth; si/icle roundish-obovate, shorter than 
the pedicel ; stig. subsessile.—In cultivated, stony fields,Can. and Northern States. 
The whole plant smooth, 8—12/ high, branched. Leaves 1—2’ long, } as wide, 
the cauline slightly arrow-shaped with small obtuse auricles, wavy and toothed 
