82 CRUCrPERAE 



Bacemcs subcapitate in the leaf axils and forks; corolla bright yellow; plant prostrate 



8. L. flavum. 

 B. Style none, the stigma sessile or subsessile; corolla white or none; annuals. 



1. Pods notched but not winged. 



Pedicels terete or only slightly flattened. 

 Margin of pods not scaberulous. 



Plants erect; leaf -blades narrowly ovate to lanceolate, oblanceolate or linear, pinnatifid 

 to serrate or entire; sepals deciduous. 



Petals present; cotyledons accumbent 9. L. virginicum. 



Petals minute or none; cotyledons incumbent 10. L. densiflorum. 



Plants prostrate or diffuse; blades of leaves bipinnatifid or those of the upper pin- 



nately parted; petals setaceous, minute; sepals persistent, rarely deciduous 



11. L. pubescens. 



Margin of pods scaberulous; blades of leaves once or twice pinnately parted, the ultimate 



segments mostly ovate or oblong; petals none; sepals deciduous, rarely persistent; 



coastal S. Cal., rare 12. L. robinsonii. 



Pedicels very much flattened. 



Herbage hirsutulose; petals minute or none; pods pubescent, at least on the margins 



13. L. lasiocarpum. 

 Herbage glabrous or sparingly pubescent; petals present; pods glabrous 14. L.nitidum. 



2. Fods winged at apex with two lobes or teeth. 



Pods conspicuously reticulated; dwarfs with mostly prostrate or decumbent stems; wings or 

 teeth approximate or parallel. 



Wings nearh' as long as the body 15. L. Intipes. 



Wings very short _ 16. L. dictyotum. 



Pods with finer reticulations ; teeth divergent. 



Eaceme rather dense, with ascending pedicels 17. L. acutidens. 



Raceme open, with horizontally spreading pedicels 18. L. oxycarpum. 



1. L. jaredii Bdg. Carrizo Pepper. Annual ; stem slender, freely branching, 

 erect, 1% to 2V2 feet high; herbage glaucous, glabrous or puberulent; leaf -blades 

 linear-lanceolate, entire or somewhat toothed, 1% to 4^ inches long, sessile; ra- 

 cemes in flower dense, soon rather loose; pedicels filiform, 3 to 5 lines long; petals 

 white; pods elliptic or nearly orbicular, obtuse, wingless, glabrous, I14 lines long; 

 style 1/4 line long. 



Washes or valley flats, 200 to 1500 feet: eastern San Luis Obispo Co.; western 

 Fresno Co. Apr., fr. May. 



Field note. — About two miles north of Cantua Creek on the plain of the San Joaquin Valley, 

 just north of the Coalinga Hills (oil fields), a broad surface wash comes down from the foothills 

 of the San Carlos Range, a few miles westerly. This sandy wash, underlain by adobe, now supports 

 (April, 1935) a rank growth of Phacelia tanacetifolia, Lepidium nitidum, Monolopia gracilipes, 

 Streptanthus inflatus, Amsinckia vernicosa and a bushy very floriferous annual about two feet 

 high with white flowers which proves to be Lepidium jaredii, uncollected for perhaps 32 years. 

 Individuals of this crucifer are scattered over an area of ten acres. Brought home to the labora- 

 tory the petals turn yellovrish, which change would account for the color noted in the original 

 description. — Jepson Field Book, vol. 54, p. 106 (ms). 



Refs. — Lepidixtm jaredii Bdg. Zoe 4:398 (1894), based on spms. from Goodwin, San. Luis 

 Obispo Co., Jared, and Riverdale, Fresno Co., A. Eaton; Jepson, Man. 438 (1925). 



2. L. draba L. Hoary Cress. Stems several from deep-seated perennial 

 roots, 12 to 16 inches high, leafy below, branching above and bearing a corymbose 

 panicle of racemes; herbage grayish-puberulent; leaf -blades ovate to oblong, sagit- 

 tate-clasping at base and with scattered minute or sometimes salient teeth on the 

 margin, 1 to 2% inches long; blades of the basal leaves attenuate to slender peti- 

 oles; petals white; pedicels mostly horizontally spreading; pods somewhat cordate, 

 neither winged nor notched at apex, glabrous, 1 to 1% lines long, broader than long. 



Valley flats, 5 to 2700 feet, garden plant, naturalized from Europe : Coast 

 Ranges to coastal Southern California. Apr.-May. 



