ORDEU 11. CRUCIFEILE. 41 



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

 cordate. Flowers lilac. 



1 Li. REDivivA L. Perennial Satin-flmcer. Lvs. ovate, petiolate, mucronately serrate ; 



silicies lanceolate, narrowed at each end. U 2 3f. June. 



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



@ Flowers large, purple. May, June. 



18. DRABA, L. WHITLOW GRASS. (Apdfh/, acrid, biting ; from the 

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

 Silicic 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. Percnn. .Nos. 2, 3, 4 

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



b Pedicels as loug as or 'onger than the pcds Nog. 5, 6 



b Pedicels shorter than the pods Nos. 7, 8 



1 1). (Erophlla) verna L. Whitlow Grass. Scape naked ; Ivs. oblong, acnte, sub- 



eerrate, hairy ; pet. bifid ; stig. sessile ; silicic oval, flat, shorter than the pedicel. @ 

 A little Spring flower, in rocky places. Can. to Va. 1 3'. 



2 I>. ramogisslma 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. 11 Va. Ky. 5 &. May. 



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



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

 ing ; style very short, li Lake shores, Vt. N. Y. Mich. 6 1(X. White. May. 



4 D. lnca.na L. Hoary pubescent; root leaves in tufts, wedge-lanceolate, slightly 



toothed: ft. nearly naked, branches and ped. very erect ; eilicle oblong (5"), twisted, 

 sty. very short, li or Mts. N.Vt. and N. 6 &. Lvs. 6". Fls. very email, white. June. 

 . D. neiiioralts Ehrh. Pubescecnt, branched; Ivs. oval, the cauliue lanceolate, 

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

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



6 D. bracliyearpa N. Minutely pubescent; Ivs. ovate, the cauline oblong; rac. 



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

 South. 34'. Pod 2". April. 



7 D. cunelfulla N. Hircute, pubescent, branching and leafy below, naked above; 



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

 (4") than the pedicels. Ky. to La. 38'. March. 



8 D. Carollnla.ua Walt. Hispid, branching and leafy below, naked above ; Ivs. en 



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

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

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



19. ARMORACIA, Rupp. HOUSE-RADISH. (Armorica, its nathe 

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

 much exceeding the calyx. Silicles ellipsoid or globular, turgid, l-ccllcd 

 from the incomplete partition. Style distinct. Seeds few (= c ). if Lvs 

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



t A. ruKiica.ua Rupp. Radical Ivs. oblong, crejiate; canline long, lanccohaie. in 

 '.teed; Pilicle roundish, ellipsoid, miiiA loncer thai? the style, s Ear. 



