176 Cruciferae 



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 

 acutish, entire or few-toothed, 1-5 cm. long; raceme peduncu- 

 late, at length elongated, loosely flowered; flowers small, white; 

 pods linear-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. 



2. 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. 



3. 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. 



19. ATHYSANUS Greene. 



.Slender diffuse annual, leafy only near the base- 

 Leaves simple, toothed. Sepals equal. Petals without 

 claws. Stamens 6, equal. Silicles orbicular not winged 

 or margined, 1-celled and 1-ovuled. 



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

 filiform, branching from the base, the branches mostly ascend- 

 ing, unilaterally racemose throughout ; leaves few, ovate, sparingly 

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

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



Frequent in the chaparral belt throughout our range. March-May. 



20. THYSANOCARPUS Hook. LACE POD. 



Erect and slender, sparingly branched annuals with 

 minute white or rose-colored flowers in slender elongated 

 racemes. Stamens 6, tetradynamous or rarely only 4. 

 Capsule compressed, orbicular, 1-celled, 1-ovuled, inde- 

 hiscent, winged ; the wings entire crenate or perforated. 



