Order 13.— CRUCIFER^E. 237 



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

 Apr. 



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

 naked ab»ve ; lvs. cuneate-oblong, sessile, denticulate ; rac. elongated in fruit ; 

 silicles twice longer than the pedicels, 20 — SO-seeded. — Fields, Ky. to La- Plant 

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

 longer than the sepals. Mar., Apr. 



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

 smooth, longer than the pedicels, corymbous, 30 — 40-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. Silicle 6" long, rather obtuse, smooth (or minutely hispid in 

 /3 ?). Apr. — Jn. (D. micrantha Nutt) 



20, ARMORACIA, Rupp. Horse Radish. (Armorica, 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 = ). — 4 Lvs. oblong, undi- 

 vided, or the lower pinnatifid. Fls. white. 



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

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

 — 2| A common garden herb, sparingly naturalized in wet grounds. Rt. fleshy, 

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

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

 often cut in 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. (Cocldearia L.) 



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

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

 little longer than the style. — Lakes and rivers, Can., N. Y. to Ky. Fls. not large 

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

 turtium lacustre Gray. N. natans /3. Americanum ejusd. Cochlearia aquatics 

 Eaton?) 



2i. VESICARIA, Lam. Bladder-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. Shortii Torr &, Gr. Lvs. elliptical, sessile, entire ; style twice as long as the 

 globous silicle; sds. 2 — 4, not margined. — (j) 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 silido 

 as large as the fruit of Coriander. 



22. CAMELINA, Crantz. False Flax. (Gr. %aiidl, dwarf, Xivov, 

 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- 

 losv. 



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

 pyriform, margined, tipped with the pointed style.— <J) In cultivated fields. St 

 i — 2 J' h'g D > straight, erect, branching. Lvs. roughish, 1 — 2' long, clasping the 

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

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

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



