166 Cruciferae 



1. T. lasiophyllum Greene. Erect annual, simple or spar- 

 ingly branched above the middle, hispid below, often smoothish 

 above; leaves oblanceolate in outline, irregularly sinnuate- 

 toothed or pinnatifid with spreading acute entire or toothed seg- 

 ments, 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 attenuate, 3-5 cm. long, on pedicels 2-3 mm. 

 long. (Sisymbrium reflexum 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 

 spreading. (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. Se- 

 pals 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. 



4. STBEPTANTHUS Nutt. 



Erect branching often glaucous annual or biennial 

 herbs, with entire or toothed rarely pinnatifid leaves 



