OKDEK li. CRUCIPEILfi. 48 



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

 =o. 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 



1 I,. Virginicum L. Tongue-grass. Lvs. linear-lanceolate, the lower incisely ser- 



rate ; pet. 4 ; silicles orbicular, emarginate ; cotyledons = <= . Dry places. If. 



2 Ij. ruderale L. Cauline Ivs. incised, those of the branches entire ; pet. none ; pods 



broad-oval, notched, wingless. Dry fields. Rare. 10 W. Always apetalous. % 



3 L. camp&stre R. Br. Yellow-seed. Cauline Ivs. sagittate-clasping, denticulate; 



silicles ovate, notched, winged, rough. Dry fields. Rare. 6 1(X. Jn. Eur. 



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



elliptic-ovate, notched and winged. Eur. 2f. A garden salad. July. 



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

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

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

 and each 1-seeded, cotyledons incumbently folded on themselves. (T) or 

 (2) Prostrate and diffuse, with minute white flowers. 



1 S. didyma Pers. Lvs. pinnate, with pinnatifid segments ; silicles rugouely reticu- 



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



2 S. Coronopus DC. Lvs. pinnate, with the segm. entire, toothed, or pinnatifid ; 



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



27. ISATIS, L. WOAD. (Ida^oo, to make equal ; supposed to remove 

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

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

 (||o). None North American. 



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

 very obtuse, three times as long as broad. Eng. 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. (D Maritime, fleshy herbs. 

 Flowers purple. 



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

 silicic clavate, upper ovate-ensiform : racemes spike-like. Coasts, N. States. Pros- 

 trate. 6 12'.. July, August. 



29. RAPHANUS, L. RADISH. ('Pa, quickly, (paira, 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 

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



1 R. Raplianistrum L. Wild Eadish. Lvs. lyrate; sUique moniliform, S-8- 



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

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



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



minate, scarcely longer than the style. China. 2 4f. Root napiform or fusiform, 

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



