CEUCIFEE^. (mustard FAiriLY.) 85 



and broadish pods spreading or ascending. — Fort Gratiot, &c., Michigan. — 

 Boot-leaves hairy. Pod 1' long. Flowers pale purple. 



8. BARBABt:A, B. Br. Wikteb Ckess. 



Pod linear, terete or somewhat 4-sided ; the valves being keeled by a mid- 

 nerve. Seeds in a single row in each cell, marginless. Cotyledons accmnbcnt. 

 — Mostly biennials : flowers yellow. (Anciently called The Herb of St. Bar- 

 bara.) 



1. B. vulgaris, E. Br. (Common Winter Ckess. Yellow Eock- 



ST.) Smooth; lower leaves lyi'ate, the terminal division round; upper leaves 

 obovato, cut-toothed, or pinnatifid at the base; pods convex-4-angled, much 

 thicker than the pedicel, erect, pointed with a manifest style ; — or, in the var. 

 BTBfCTA, rather flatter, tipped with a thicker and very short style (B. priecox. 

 Hook. Fl. Sot. -Am., &c.) ; — or, in var. akcuIta, ascending on spreading ped- 

 icels when young. — Low grounds and road-sidos. May. — Probably naturalized 

 from Europe. But the vaiieties here indicated are indigenous from Lake Supe- 

 rior northward and westward. (Eu.) 



B. pkAcox, R. Br. (B. patula, Fries), — occasionally cultivated for salad 

 in the Middle States, under the name of Scurvi/-Grass, — is becoming spon- 

 taneous farther south. It is readily known by its longer and less erect pods, 

 scarcely thicker than their pedicels, and by the linear-oblong lobes of most of 

 the stem-leaves. 



9. EK"tSIM[U]TI, L. Tkbacle Mustard. 



Pod linear, 4-sided ; the valves keeled with a strong midrib. Seeds in a single 

 row in each cell, oblong, marginless. Cotyledons (often obliquely) incumbent. 

 Calyx erect. ~- Chiefly biennials, with yellow flowers ; the leaves not clasping. 

 (Name from dpva, to draw blisters.) 



1. E. dieirantlioides, L. CWoem-sbed MnsTARD.) Minutely 

 roughish, branching, slender ; leaves lanceolate, scarcely toothed ; flowers small ; 

 pods small and short (7" -12" long), vei7 obtusely angled, ascending on slender 

 divergent pedicels. — Banks of streams. New York, Penn., Illinois, and north- 

 wai-d : apparently tiuly indigenous. July. (Eu.) 



2. E. Arkansftnum, Nutt. (Western WALL-rtowER.) Minutely 

 roughish-hoary ; stem simple; leaves lanceolate, somewhat toothed ; pods nearhj 

 erect on very short pedicels, elongated (.3' - 4' long), exactly 4-sided ; stigma 2-lobcd. 

 — Ohio (on limestone cliff's) to Illinois, and southwestward. June, July. — 

 Plant stout, l°-2° high; the crowded bright orange-yellow flowers as large as 

 those of the Wall-flower. 



10. SISYMBRIUM, L. Hedge Mustard. 



Pod terete, flattish, or 4-C-sided; the valves 1-3-nervcd. Seeds oblong, 

 marginless. Cotyledons incumbent. Calyx open. — Flowers small, while or 

 yoUow. (An ancient Greek name for some plant of this family.) 



