276 CRUCIFER^, 



rosulate tuft, pinuatifid, with short obtuse lobes or subentire, hirsute; 

 cauline oblong- or linear-lanceolate, entire, sagittate-clasping: fr. obovate, 

 seldom 2 lines wide, strongly concavo-convex, glabrous or slightly tomen- 

 tose, the marginal rays broad, dilated above, rather crowded, with narrow 

 diaphanous spots (rarely a few perforations) between them. Var. (1) 

 involutus. Taller and more strict: fr. elliptical, only a line wide; rays 

 nearly obsolete, the purplish subscarious margin closely involute all 

 around; style (rather prominent in fl.) deciduous. Var. (2) pnlcltellns. 

 T. pulcheUus, F. & M. (1835). Radical leaves merely toothed: pods 

 densely tomentose; the wing rather broader. — The type of this species 

 has not been found south of Mt. Shasta, except in Humboldt Co., Mar- 

 shall, 3Iiss Bush. The first variety is from Sonoma Co., Bioleiti, and this 

 may not improbably be found distinct. Var. 2 is our most common form 

 in middle California. 



2. T. elegans, F. & M. 1. c. Hook. Ic. 39. Rather stouter, with fewer 

 racemose branches: lower leaves ascending, repand-toothed : fr. 3—4 

 lines broad, of more rounded outline, nearly plane, the body densely 

 tomentose, the rays separated by regularly ovoid ^perforations, and joined 

 together beyond them into a very distinct diaphanous nearly entire 

 margin. — Common on low hills of the interior valley in the neighborhood 

 of alkaline or subsaline plains; also beyond the Sierra. Certainly a most 

 distinct species in the character of its fruit, and of peculiar habitat, not 

 being found at all in the Coast Range or toward the sea. 



3. T. laciiiiatus, Nutt.; T. & G. Fl. i. 118 (1838): T. ramosm, Greene, 

 Bull. Calif. Acad. ii. 390 (1887). Small and simple, or larger with many 

 decumbent branches from the base, glabrous throughout and glaucous: 

 leaves linear, entire, or with a few incised or opposite and divaricate 

 narrow segments: fr. from elliptical with narrow margin, to almost 

 orbicular with broad evenly crenate border, scarcely plano-convex, 

 13^ — 2}£ lines broad, imperforate, or with irregular deep sinuses between 

 the rays, or rarely with a few perforations, glabrous and very distinctly 

 reticulate-venulose.— From Mt. Diablo southward throughout the State, 

 and eastward to New Mexico; very distinct in its vegetative characters, 

 but the silicle variable. 



4. T. radians, Benth. PI. Hartw. 297 (1849). Glabrous, 1 ft. high: 

 lower leaves runcinate-pinnatifid; cauline ovate-lanceolate, auriculate- 

 clasping: silicle round-obovate, almost plane, 4—5 lines wide, tomentose, 

 the rays narrowly linear, ending abruptly near the edge of the broad and 

 otherwise diaphanous margin. — Common in the interior valleys of Sonoma 

 and Solano counties and northward. 



25. CORONOPUS, Ruellius. Diffuse prostrate heavy-scented annuals, 

 with pinnatifid leaves, and the general aspect of some species of Lepidium. 



