BRASSICACEAE. 151 



cm. long, 2-8 cm. wide, long-petioled; upper leaves similar or less 

 divided or oblong-lanceolate and entire, short-petioled; flowers 

 numerous, yellow; petals 16-24 mm. long; filaments filiform, exserted; 

 siliques 5-8 cm. long, on stipes about ^ as long. 



Occasional on the dry plains and foothills of all interior valleys. 



2. THELYPODIUM Endl. 



Erect annual or biennial herbs, glabrous or somewhat 

 pubescent with simple hairs. Leaves entire, toothed or 

 pinnatifid. Flowers racemose or subspicate, purplish or 

 whitish. Siliques nearly terete, linear, short-stipitate or 

 sessile; valves 1 -nerved, dehiscent; style short; stigma 

 nearly entire. Seeds in 1 row in each cell, oblong, mar- 

 ginless. Cotyledons incumbent. 



1. T. lasiophyllum Greene. Erect annual, simple or sparingly 

 branched above the middle, hispid below, often smoothish above; 

 leaves oblanceolate in outline, irregularly sinuate-toothed or 

 pinnatifid with spreading acute entire or toothed segments, 4-12 

 cm. long, distinctly petioled or the upper sessile by a narrow base; 

 inflorescence racemose; sepals oblong, ^ as long as the petals; these 

 narrow, spatulate, 3-5 mm. long, pale rose color or yellowish- 

 white; siliques usually deflexed or widely spreading, slender attenu- 

 ate, 3-5 cm. long, on pedicels 2-3 mm. long. {Sisymbrium re- 

 flexum Nutt.) 



Common in dry ground both in the valleys and foothills. 



2. T. lasiophyllum inalienum Robinson. Size and habit of 

 the type; petals yellow or yellowish; siliques erect or slightly spread- 

 ing. {Sisymbrium acutangulum Brew. & Wats.) 



Hills about Los Angeles. 



3. CAULANTHUS Watson. 



Stout erect biennials, with pinnatifid, toothed or nearly 

 entire leaves and purple or greenish-white flowers. 

 Sepals about equal, saccate at base. Petals slightly 

 longer, undulate-crisped, claw broad, blade rhomboidal, 

 scarcely broader than claw. Anthers linear, sagittate at 

 base, curved. Stigma somewhat 2-lobed, the lobes 

 parallel with the valves. Pods terete, elongated, sessile 

 upon the receptacle; valves 1-nerved. Seeds in 1 row, 

 oblong, somewhat flattened, scarcely or not at all 

 margined. Cotyledons incumbent. 



1. C. amplexicaulis Wats. Glaucous annual, rather slender 

 and flexuous, simple or more frequently with several spreading 

 branches; leaves elliptic-oblong or the upper broadly cordate- 

 clasping, subentire, often ascending; pedicels 8-24 mm. long, widely 

 spreading. 



Near San Fernando, Davidson. 



