3 L. campestre R. Br. Yellow-seed. Cauline lvs. sagittate, denticulate; silicles ovate, emarginate, scaly, punctate.- In waste places and dry fields, especially among flax. St. strictly erect, round, minutely downy, 6 - 10' high, branching. Lvs. 1' long, 1/4 as wide, with two lobes at base, upper one clasping the stem, all minutely velvety. Fls. Email. Silicles 1 1/4" long, numerous, in long racemes. Jn., Jl. § Eur.
4 L. sativum L. Peppergrass. Lvs. variously divided and cut; branches without spines; silicles broadly oval, winged.- Native of the East. Sts. 1 - 3f high, very branching. Silicles 2 - 3" broad, very numerous. A well known garden salad. Jl. ‡ §
27. 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-sceded, cotyledons incumbently folded on themselves.- or Prostrate and diffuse, with minute white fls.
1 S. didyma Pers. Lvs. pinnate, with pinnatifid segments; silicles rugously reticulated, notched at the apex. - Waste places and waysides, southern States, common. Sts. spreading circularly like the carpet weed (Molugo), flat on the ground. Lvs. 1 - 3' long, oblong in outline, its lobes obtuse, and cleft mostly on the upper margin. Fls. minute. Silicles very small apparently doubled, rough-wrinkled. Feb. - Jn.
2 S. corondpus DC. Lvs. pinnate, with the segm. entire, toothed, or pinnatifid; silicles tubercled, not notched at apex. - Waste grounds, Va. and Car. (Pursh), R. Isl. (Robbins). Not common. § Eur.
28. ISATIS, L. Woad. (Gr. iσaςω, to make equal; supposed to remove roughness from the skin.) Silicle elliptical, flat, 1-celled (dissepiment obliterated), 1-seeded, with carinate, boat shaped valves, which are scarcely dehiscent (0||). None of the species are N. American.
I. tinctoria L. Silicles cuneate, acuminate at base, somewhat spatulate at the end, very obtuse, 3 times as long as broad.- The Woad is native of England. It is occasionally cultivated for the sake of its leaves, which yield a dye that may be substituted for Indigo. The plant grows about 4f high, with large leaves clasping the stem with their broad bases. Fls. yellow, large, in terminal racemes. May - Jl.‡
29. CAKILE, Tourn. Sea Rocket. (Named from the Arabic.) Silicle 2-jointed, the upper part ovate or ensiform; seed in the upper cell erect, in the lower pendulous, sometimes abortive.- Maritime herbs.
C. maritima Scop. Upper joint of the silicle ensiform or ovate-ensiform. - Native of the seacoast and lake shores, N. States. A smooth, succulent plant, branching and procumbent, 6 - 12' long. Lvs. sinuate-dentate, oblong-ensiform, caducous. Fls. on short, fleshy peduncles, in terminal spikes or racemes, corymbously arranged. Petals purple, obtuse at end. Silicle smooth, roundish, lower joint clavate-obovate, upper with one elevated line on each side. Jl., Aug.
30. RAPHANUS, L. Radish. (Gr. quickly, to appear; from its rapid growth.) Calyx erect; petals obovate, unguiculate; siliques terete, torulous, not opening by valves, transversely 2-jointed, joints with one or several cells, seeds large, subglobous, in a single series (0»).
1 R. Raphanistrum L. Wild Radish. Lvs. lyrate; silique moniliform, 3 - 8-seeded, becoming in maturity 1-celled, longer than the style.- Naturalized in cultivated fields and roadsides, but rare. St glaucous, branching, 1 - 2f high, bristly. Lvs. rough, dentate, petiolate or sessile. Cal. bristly. Petals yellow, veiny, blanching as they decay. Jn., Jl. § Eur.
2 R. sativa L. Garden Radish. Lower lvs. lyrate, petiolate; silique 2 -3-seeded, acuminate, scarcely longer than the style- - A well known salad root from China. St. 2 - 4f high, very branching. Lower lvs. 6 - 10' long. Fls. white, or tinged with purple, veiny. Pods 1 - 2' long, thick and fleshy. The principal varieties are the Turnip Radish, root subglobous ; Common Radish, root oblong, terete; Black Spanish Radish, root black outside. Jn. - Aug.