ORDER 11. CRUCIFEILE. 41 



valves ; funiculus adhering to the dissepiment (== o ). European. Leaves 

 cordate. Flowers lilac. 



1 It. REDIVIVA L. Perennial Satin-flower. Lvs. ovate, petiolate, mucronately serrate ; 



silicles lanceolate, narrowed at each end. it 2 3f. June. 



2 It. BIENNIS DC. Honesty. Lvs. with obtuse teeth; silicles oval, obtuse at both ends. 



@ Flowers large, purple. May, June. 



18. DRAB A, L. WHITLOW GRASS. (Apdp-ri, acrid, biting ; from the 

 taste of the plant.) Calyx equal at base. Pet. equal. Fil. without teeth. 

 Silicle oval or oblong, entire, the valves flat or slightly convex, veined. 

 Seeds not margined, 2-rowed in each cell (= c ). Flowers white, rarely 

 yellow. Plants small. 



EROPHILA. Petals 2-parted ........................... ; ....................... No. 1 



DRABA proper. Petals entire or only emarginate. (a) 



a Style distinct, long or short. Pods twisted when ripe. Perenn. .Nos. 2, 3, 4 

 a Style none. Pods straight, plane. Plants annual or bienn. (6) 



b Pedicels as long as or !onger than the pods ................. Nos. 5, 6 



b Pedicels shorter than the pods ............................. Nos. 7, 8 



1 D. (Eropliila) verna L. Whitlow Grass. Scape naked ; Ivs. oblong, acute, sub- 



serrate, hairy ; pet. bifid ; stig. sessile ; silicle oval, flat, shorter than the pedicel. (T) 

 A little Spring flower, in rocky places. Can. to Va. l^-JK. 



2 D. ramosissima Desv. Minutely pubescent, diffuse; Ivs. linear-lanceolate, with 



remote and slender teeth ; rac. panicled ; silicle lanceolate, about the length of the 

 pedicel, the style half as long, v Va. Ky. 5 8'. May. 



3 D. arabisans MX. Slightly pubescent ; root leaves in tufts, wedge-lanceolate, 



toothed ; stems leafy, erect, its Ivs. oblong ; silicle glabrous, lance-oblong (6"), spread- 

 ing ; style very short. "H Lake shores, Vt. N. Y. Mich. 6 KX. White. May. 



4 I>. iiicana L. Hoary pubescent; root leaves in tufts, wedge-lanceolate, slightly 



toothed ; st. nearly naked, branches and ped. very erect ; silicle oblong (5"), twisted, 

 sty. very short, it or @ Mts. N.Vt. and N. 6 8'. Lvs. 6". Fls. very small, white. June. 



5 D. nemoralis Ehrh. Pubescecnt, branched; Ivs. oval, the cauline lanceolate, 



toothed ; pet. emarginate ; silicles half the length of the spreading pedicels. Mich. 

 Mo. 8 1(K. Flowers small, white or yellowish. May. 



6 D. brachycarpa N. Minutely pubescent ; Ivs. ovate, the canline oblong ; rac. 



GO-flowered ; pet. obovate, entire ; silicle as long as the ped. 6-seeded. Mo. and 

 South. . 3 4>. Pod 2". April. 



7 JD. cuneifolia N. Hirsute, pubescent, branching and leafy below, naked above ; 



Ivs. cuneate-oblong, sessile, denticulate ; rac. elongated in fruit ; silicles twice longer 

 (V) than the pedicels. Ky. to La. 3 8'. March. 



8 D. Caroliniana Walt. Hispid, branching and leafy below, naked above ; Ivs. en- 



tire, obovate and oval ; rac. short ; silicles oblong-linear, longer than the pedicels (5'0- 

 R. I. to Ga. and W. 13'. Much like No. 7. April^Tune. 

 /3. micrdntha. Silicles minutely hispid ; pet. often wanting. (D. micrantha N.) W. 



19. ARMOR ACIA, Rupp. HORSE-RADISH. (Armor tea, its native 

 country, now the province Brittany, France.) Sep. spreading. Pet. entire, 

 much exceeding the calyx. Silicles ellipsoid or globular, turgid, 1-cellcd 

 from the incomplete partition. Style distinct. Seeds fe\v (=c). if Lvs. 

 oblong, undivided, or the lower pinnatifid. Flowers white. 



1 A. rusticana Rupp. Radical Ivs. oblong, crenate ; cauline long, lanceolate, in 

 cised ; eilicle roundish, ellipsoid, much longer than the style. Eur. 



