Ohdee 13.— CEUCIPEB-S. 237 



at branched and leafy, 2 — i' high. Silicles scarcely 2" in length. Mar., 

 Apr. 



6 D. cuneifdlia Nutt. Hirsute, pubescent; st. branching and leafy below, 

 naked above ; Ivs. cuncate-oblong, sessile, denticulate ; rao. elongated in fruit ; 

 rilides tvrice longer than the pedicels, 20 — SO-seeded. — Fields, Ky. to La^ Plant 

 3 — 8' high. FIs. much larger than in the preceding. Petals white, nearly thrice 

 longer than the sepals. Mar., Apr. 



7 D. Carolinidna Walt. Lvs. ovate-roundish, entire, hispid; silicles linear, 

 smooth, longer than the pedicels, corymbous, 30 — iO-seeded. — Sandy fields, Ct, 



R. I., S. to Ga. St. 1 — 3' high, leafy at base, hispid, naked and smooth above. 

 Lvs. clustered on the lower part of the stem, very hairy. Petals white, twice as 

 long as the sepals. Siliole 6" long, rather obtuse, smooth (or miuutely hispid in 

 j3 ?). Apr. — Jn. (D. micrantha Nutt) 



20, ARMORACIA, Rupp. Horse Eadish. {Armorka, its native 

 country, now the province Brittany, France.) Calyx equal at base, 

 spreading; petals entire, much exceeding the calyx; filaments tooth- 

 less ; silicles ellipsoid or globular, turgid, 1-celled from the incomplete 

 partition; styles distinct; seeds few (0=). — U Lvs. oblong, undi- 

 vided, or the lower pinnatifid. Fls. white. 



1 A. rusticdna Rupp. Radical lvs. oblong, crenate; cauline long, lanceolate, 

 dentate or incised, sessile; silicle roundish,' ellipsoid, much longer than the style. 

 — 11 A. common garden herb, sparingly naturaUzed in wet grounds. Rt fleshy, 

 large, white, very acrid. St. 2 — 3f high, angular, smooth, branching. Radical 

 lvs. near a foot long, \ as wide, on long channeled petioles. Lower stem-lvs. 

 often cut ill a pinnatifid manner, upper toothed or entire. Fls. not large. 

 Silicle much shorter than the spreading pedicels. The root is a well known con- 

 diment for roast beef and other viands. Jn. § Eur. (Cochlearia L.) 



2 A. Americana Am. Aquatic; immersed leaves doubly pinnatifid with 

 capillary segments, emersed oblong, pinnatifid, serrate or entire; silicle ovoid. 

 Utile longer tlmn the style. — Lakes and rivers, Can., N. T. to Ky. Fls. not large 

 (4" broad). Silicle 2" long, on long spreading pedicels, much as in No. 1. (Nas- 

 turtium laoustre Gray. N. natans /3. Americanum ejusd. Cochlearia aquatica 

 Eaton?) 



2i. VESICARIA, Lam. Bxadder-pod. (Lat. vesica, a bladder or 

 blister ; from the inflated silicles.) Petals entire ; silicle globous or 

 ovoid; inflated valves nerveless, hemispherical or convex ; seeds several 

 in each cell, sometimes margined (0 = ). — Fls. yellow. 



1 V. Sh6rtii Torr & Gr. Lvs. elliptical, sessile, entire; style twice as long as the 

 globous silicle; sds. 2—4, not margined. — ® Banks of Elkhorn Creek, near 

 Frankfort, Ky. (Short, in North Am. Flora.) St. decumbent, about a span long, 

 slender, stellately pubescent. Lvs. 6 — 12" long. Pedicels 6" long, and the silioie 

 as large as the fruit of Coriander. 



22. CAMELINA, Crantz. False Flax. (Gr. %cffal, dwarf, Mvov, 

 flax.) Calyx equal at base; petals entire; silicle obovate or sub- 

 globous, with ventricous valves and many-seeded cells ; styles filiform, 

 persistent; seeds oblong, striate, not margined (0||). — Fls. small yel- 

 low. 



C. sativa Crantz. Lvs. lanceolate, sagittate at base, subentire ; silicle obovate- 

 pyriform, margined, tipped with the pointed style. — (T) In cultivated fields. St 

 J— 2J' high, straight, erect, branching. Lvs. roughish, 1 — 2' long, clasping the 

 stem with their acute, arrow-shaped lobes. Fls. in paniculated racemes. SUidea 

 3 — 4" long, on pedicels 2 — 3 times as long. Said to be cultivated in Grermaii}- 

 for the oil which is expressed from the seeds. Jn. § Eur. 



