BRASSICACEAE. 153 



2. L. lasiocarpum Nutt. Low, branching from or near the 

 base, decumbent or ascending, hirsute with spreading hairs or 

 somewhat tomentulose; lower leaves pinnately parted, segments 

 usually rather broad, obtuse or rounded, sparingly toothed or 

 entire; racemes several; pedicels distinctly flattened, horizontally 

 spreading, 3 mm. long; capsule suborbicular, thin-margined near 

 the apex, hispid pubescent upon both faces or at least upon the 

 margins. 



Sand-dunes along the seashore. 



3. L. nitidum Nutt. Erect or usually branched from the base 

 and spreading, 1-3 dm. high, glabrate or somewhat pubescent; lower 

 leaves deeply pinnatifid with narrow rachis and alternate segments; 

 the upper leaves often entire; racemes 1-several, loosely flowered; 

 petals considerably exceeding the sepals; pedicels strongly flattened, 

 spreading; capsule smooth, shining, often purplish, 4-5 mm. long. 



Very common on grassy plains and hills. February-March. 



4. L. acutidens (Gray) Howell. Branching from the base, de- 

 cumbent or ascending, 10-20 cm. long, pubescent throughout with 

 short spreading hairs; leaves linear, tapering at both ends, entire 

 or faintly and remotely denticulate, 2-5 cm. long, about 2 mm. 

 wide; branches flowering about | their length; racemes rather loose; 

 pedicels strongly flattened, appressed to the stem to near the middle, 

 then curving outward; pot strongly reticulated, sparsely pubescent, 

 4 mm. long including the acute teeth, about 3 mm. broad; sinus 

 about 1 mm. deep and 2 mm. broad at tip. ( L. dictyotum acutidens 

 Gray.) 



In saline places toward the coast. Cienega; Santa Monica. 



6. ERYSIMUM L. Hedge-mustard. 



Erect annual, somewhat hirsute at least below with 

 simple hairs. Leaves pinnatifid. Inflorescence spici- 

 form with several divaricately spreading branches. 

 Flowers small, yellow. Siliques terete, tapering almost 

 from the base to the apex; stigma slightly 2-lobed. 

 Seeds in 1 row in each cell. A monotypic genus as here 

 understood. 



1. E. officinale L. Stems 3-6 dm. high; basal leaves lyrately 

 and somewhat runcinately pinnatifid, 7-15 cm. long, the upper 

 shorter, lanceolate, subentire or hastate; pods 1 cm. long, nearly 

 sessile, erect and closely appressed to the rachis. {Sisymbrium 

 officinale Scop.) 



Common along streets and in waste places. Native of Europe. 



7. DIPLOTAXIS DC. Sand Rocket. 



Erect annual or perennial herbs with pinnatifid or 

 lobed leaves and rather large yellow flowers in^ terminal 

 racemes. Silique elongated linear, flat or flattish, short 



