MUSTARD FAMILY. 65 



E. Perofskianum, Eisch. & Mey. Stem simple ; leaves lanoe-spatulate, 

 remotely toothed ; flowers showy ; pods about 1' long, obtusely 4-angled. 

 Cult, from Caucasus. ** Mowers yellow. 



E. cheirantholdes, Linn. Treacle Mustard or Wormseed Mustard. 

 Annual ; branches slender ; leaves lanceolate, almost entire ; flowers 

 small, yellow ; stigma small. Along streams, N. 



E. pulchellum, Boiss. (or Cheiranthus pulchellus) . % Compact 

 growing, much branched at base ; lower leaves oblong-spatulate, dentate, 

 or lyrate, upper oblong or lanceolate, sharply pectinate-dentate ; stigma 

 broad as the pod ; flowers showy, sulphur-yellow in spring. Cult, from 

 Caucasus. 



19. SISYMBRIUM, HEDGE MUSTARD. (An ancient Greek 

 name.) Pod either flattened or 4-sided, or the cross-section nearly 

 circular; in the common species shortish, lance-awl-shaped, close- 

 pressed to the stem ; seeds oval, marginless. Flowers small. (Les- 

 sons, Eigs. 427, 428.) 



S. cane'scens, Nutt. Hoary H. or Tansy Mustard. (J) Hoary; leaves 

 finely cut, twice-pinnatifid ; flowers minute yellowish ; pods oblong-club- 

 shaped, 4-sided on slender horizontal pedicels. Pa. and N. Y. to 111. and 

 S. W. Common W. 



S. officinale, Scop. Common H. (|) Stems branching ; leaves run- 

 cinate ; flowers very small, pale yellow, followed by awl-shaped, obscurely 

 6-sided pods close-pressed to the axis of the narrow spike. Coarse weed 

 in waste places. Eu. ■ 



S. Thaliana, Gaud. Mouse-ear Cress. ® Leaves obovate or oblong, 

 entirely or barely toothed ; flowers white ; pods linear on spreading 

 pedicels. Mass. to Kans. Eu. 



20. BRASSICA, CABBAGE, MUSTARD, &c. (Ancient Latin name 

 of Cabbage.) (J) ® Pod oblong or linear, beaked or pointed beyond 

 the summit of the valves, by the enlarged and persistent style base ; 

 seeds spherical. Cult, from Eu., or run wild as weeds. (Lessons, 

 Eig. 235.) 



* Whole plant glaucous-blue when in flower; leaves of the flower-stems 

 clasping ; flowers various. 



■h- Leaves from the first more or less fleshy throughout, and glaucous-blue 

 even when young ; flowers creamy yellow. 



B. oleracea, Linn. Cabbage Tribe. The original is a seacoast plant 

 of Europe, with thick and hard stem, and pretty, large, pale yellow flowers ; 

 upper ones entire, clasping the stem, not auricled at the base ; cult, as a 

 biennial — the rounded, thick, and fleshy, strongly veined leaves collected 

 jnto a head the first year upon the summit of a short and stout stem. Cau- 

 liflower and Broccoli have the nourishing matter mainly concentrated 

 in short, imperfect, flower-branches collected into a flat head. Kohl-rabi 

 has the nourishing matter accumulated in the stem, which forms a turnip- 

 like enlargement above ground, at the origin of leaves. Kale is more 

 nearly the natural state of the species, the fleshy leaves not forming a 

 head. Brussels Sprouts has numerous small heads along the stem 

 below the top leaves. 



B. Napus, Linn. Rape; Leaves smooth from the first, more deeply 

 scalloped than in the last, not forming thickened parts above ground. 



B. campestris, Linn. Ruta-baga or Swedish Turnip. Eirst leaves 

 hairy ; the root usually tuberous. 



GRAY'S F. jf. & G. BOT. — 6 



