BRASSICACEAE. 159 



pinnatifid, forming a rosette, 5-12 cm. long; cauline leaves few, 

 lanceolate, auricled, dentate or entire; flowers 2 mm. broad; pedicels 

 slender, spreading or ascending, 10-14 mm. long in fruit; pods 

 triangular, more or less deeply emarginate at the apex, rarely trun- 

 cate, 4-6 mm. long. (Capsella hursa-pastoris Medic.) 



Common weed in gardens and waste places. Flowering at all 

 times of the year. 



19. DRABA L. 



Low tufted mostly stellate-pubescent herbs, with sea- 

 pose or leafy stems, simple leaves and racemose flowers. 

 Slllcles elliptic, oblong or rarely linear, compressed. 

 Stigma entire or nearly so. Valves dehiscent, nerveless. 

 Cotyledons accumbent. 



1. D. cuneifolia Nutt. Annual, loosely stellate-pubescent 

 throughout, branching from the base, the branches slender, 8-15 

 cm. long, leafy below; leaves obovate to oblanceolate, acute or acut- 

 ish, entire or few-toothed, 1-5 cm. long; raceme pedunculate, a- 

 length elongated, loosely flowered; flowers small, white; pods lineart 

 oblong, 6-10 mm. long, many-seeded, hispid with appressed simple 

 hairs; fruiting pedicels divaricate, 2-6 mm. long; stigma sessile or 

 nearly so. 



Occasional in dry sandy soil in the foothills and the interior 

 valleys. The two varieties are more common. 



la. D. cuneifolia integrifolia Wats. Smaller than the type, 2-5 

 cm. high; leaves smaller, mostly entire; capsule glabrous; pedicels 

 2 mm. long or less. 



Same range as the type and apparently more common. 



Ih. D. cuneifolia sonorae (Greene) Parish. Much resembling 

 the type in size and habit; racemes often nearly sessile; capsules 

 hispid with stellate hairs. 



Same range as the type and the most common form with us. 



20. ATHYSANUS Greene. 



Slender diffuse annual, leafy only near the base. 

 Leaves simple, toothed. Sepals equal. Petals without 

 claws. Stamens 6, equal. SUIcles orbicular, not winged 

 or margined, 1-celled and 1-ovuled. 



1. A. pusillus (Hook.) Greene. Hirsute-pubescent; stems fili- 

 form, branching from the base, the branches mostly ascending, 

 unilaterally racemose throughout; leaves few, ovate, sparingly 

 toothed, 1 cm. long; flowers minute, often apetalous; pods lenticular, 

 more or less uncinate hispid, 2 mm. long or less. 



Frequent in the chaparral belt throughout our range. March- 

 May. 



21. THYSANOCARPUS Hook. Lace Pod. 



Erect and slender, sparingly branched annuals with 

 minute white or rose-colored flowers In slender elongated 



