ckucifekjE. 25 



linear: petals 0: pods glabrous, rounded, 1 — 1*4 lines broad very shortly 

 winged, the obtuse teeth slightly divergent; pedicels 2 lines long. — Only 

 occasionally met with in western California. 



8. L. Dbaba, L. Biennial or perennial, erect, a foot high or taller, 

 the several stems corymbosely branched at summit; herbage canescently 

 pubescent: lower leaves oblong-obovate, 1 — 3 in. long, sparingly serrate 

 or entire; cauline narrower, sagittate and clasping: petals white, con- 

 spicuous : pods cordate, not winged, turgid, acutish, tipped with a slender 

 short style. — In old fields at Berkeley. 



17. THYSANOCARPUS, Hook. (Lace-Pod). Erect, slender sparingly 

 branched annuals, with minute, white or rose-colored flowers, in 

 slender elongated racemes. Petals cuneate-obovate, or linear-oblong. , 

 Stamens 6, tetradynamous, or sometimes 4 only. Pistil a compressed 

 rounded uniovulate ovary, short slender style, and small obtuse stigma, 

 becoming a plano-convex or concavo-convex samara; the hard substance 

 of the body of the fruit branching into several (12 to 16) radiating lines 

 with diaphanous spaces or even complete rounded perforations between 

 them, the whole forming a crenate wing. Seed solitary. 



1. T. curvipes, Hook. A foot high or more; radical leaves pin- 

 natifid, 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 tomentose, the mar- 

 ginal rays broad, dilated above, rather crowded, with narrow diaphanous 

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

 Greene. 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) pulchellus, 

 Greene. Radical leaves merely toothed: pods densely tomentose; the 

 wing rather broader. Common in middle California. April — June. 



2. T. elegans, Fisch. & Mey. Bather 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. March — May. 



3. T. Iaciniatns, Nutt. 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, 1% —2% lines 

 broad, imperforate, with irregular deep sinuses between the rays, or rarely 

 with a few perforations, glabrous and very distinctly reticulate-venulose. 

 — Lake Merced; Mt. Diablo, etc. 



