OKOKH ii.-CRbCiFER;. 43 



diameter; valves carinate, dehiscent; cells 1-seeded. Cotyledons ].->, often 

 -*. Flowers small, white, often incomplete. 



Stamens only 2. Petals often wanting. Leaves not clasping Nos. 1, 3 



* Stamens 6. Silicles evidently winged Nos. 3. 4 



L,. Vlrgiiiicum L. Tongue-grass. Lv. 'linear-lanceolate, the lower incisely per- 

 rate: pet. 4 ; silicles orbicular, emarginate ; cotyledons = o. (T) Dry places. 1f. 

 J 7u. ruderAle L. Cauline Ivs. incised, those of the branches entire ; pet. none; pod? 

 broad-oval, notched, wingless. Dry fields. Rare. 1015'. Always apetalous. 



3 1^. eampestre R. Br. Yellow-seed. Canline Ivs. sagittate-clasping, denticulate; 



silicles ovate, notched, winged, rough. (T) Dry fields. Rare. 6 1(X. Jn. Enr. 



4 L. SATIVUM L. Pepper-grass. Lvs. oblong, variously incised and pinnatifid; silicles 



elliptic-ovate, notched and winged, (i) Ear. 2f. A garden salad. July. 



26. SENEBIERA, Poir. CARPET CRESS. SWINE CRESS. (In honor 

 of Senebier, a distinguished vegetable physiologist.) Silicic didymous, with 

 the partition very narrow ; valves ventricous, separating but indehiscent, 

 and each 1-seeded, cotyledons incumbently folded on themselves. @ or 

 (D Prostrate and diffuse, with minute white flowers. 



1 S. did) ma Pera. Lvs. pinnate, with pinnatifid segments ; silicles rugoucly reticu- 



lated, notched at the apex. Waste places coastward, Atlantic and Pacific. 



2 S. Coronopns DC. Lvs. pinnate, with the eegm. entire, toothed, or pinnatifld ; 



silicles tubercled, not notched at apex. R. Isl. (Robbins) to Car. Rare. 



27. ISATIS, L. WOAD. (Idd^oa, to make equal ; supposed to remove 

 roughness from the skin.) Silicic elliptical, flat, 1-celled (dissepiment ob- 

 literated), 1-seeded, vrith boat-shaped valves, which are scarcely dehiscent 

 (||o). None North American. 



I. TINCTORIA L. Silicles cnneate, acuminate at base, somewhat spatnlate at the end, 

 very obtuse, three times as long as broad. (T) Ensr. 4f. Yellow. May July. Culti- 

 vated for the dye which is yielded by its leaves. 



28. CAKILE, Tourn. SEA ROCKET. (Named from the Arabic.) Sili- 

 cle 2-jointed, the upper part ovate or ensiform ; seed in the upper cell erect, 

 in the lower pendulous, sometimes abortive. @ Maritime, fleshy herbs. 

 Flowers purple. 



C. maritlnia Scop. Lvs. oblong, bluntly serrate, obtuse, often lobed lower joint of 

 pilicle olavate, upper ovate-ensiform : racemes spike-like. Coasts, N. States. Pros- 

 trate. 612'. July, August. 



29. RAPHANUS, L. RADISH. ('Pee, quickly, (paivoo, to appear; from 

 its rapid growth.) Calyx erect. Pet. obovate, unguiculate. Siliques terete, 

 torulous, not opening by valves, transversely 3-jointed, joints with 1 or 

 v veral cells. Seeds large, subglobous, in a single series ((o. 



1 R. Raphanistrum L. Wild Radish. Lvs. lyrate; silique moniliform, S-8 



seeded, becoming in maturity 1-celled, longer than the style. @ Fields : rare. 1 2 

 Pet. yellow, blanching as they decay. June, July. Ear. 



2 R. SATIVUS. Garden Radish. Lower Ivs. lyrate, petiolate ; silique 2-3-seeded, acu- 



minate, scarcely longer than the style. (T) China. 2 4f. Root napifonn or fusiform, 

 red, black, or white. Flowers pink-white. 



