1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 301 



3-4 dm. high : cauline leaves few, the uppermost linear-lanceolate, 

 subentire, sagittate at the base, 1-2 cm. long: flowers pendent; 



sepals purple, linear-lanceolate, not saccate, nearly equal, glab- 

 rous or nearly so, about 4 mm. long ; petals at least veined with 

 purple, broadly linear, about 6 mm. long; filaments distinct, 

 about 3 mm. long, anthers not apiculate, about 1 mm. long: in- 

 florescence lax, racemose; pedicels recurved, 1-2 mm. long, hir- 

 sute: pods divaricate-descending or pendent, straight, terete or 

 slightly quadrangular, 2-4.5 cm. long, 1 mm. or less wide, sparse- 

 ly retrose-pubescent with flattened trichomes, or glabrous, ses- 

 sile; septum dense, cell-walls tortuous, closely compacted; style 

 1-2 mm. long, slightly tapering from base to apex, stigma small, 

 nearly entire: seeds not winged, embryo purple, cotyledons 

 obliquely incumbent. 



Distribution : San Diego County, southern California. 



Specimen examined: 



California: dry hillsides near Bernardo, May 1, 1903, Abrams 

 3364 (Mo. Bot. Card. Herb., type). 



This species is known from but a single specimen which has 

 only one fragmentary flower and a few leaves. The fruits, how- 

 ever, are well developed and quite mature. It is to be expected 

 that the measurements given in the specific description, espe- 

 cially of the floral parts, will probably not be found sufficiently 

 inclusive for the entire specific variation. The type was dis- 

 tributed as Streptanthus heterophyllus but the new species is 

 very different from that by virtue of the short, terete pods. Its 

 closest ally is perhaps C. simulans. From this it differs markedly 

 by the small, entire stigma and the dense septum. The charac- 

 ter of this septum is quite different from any other species of 

 Caulanthus except C. lasiophyllus. 



16. Caulanthus flavescens (Hook.) Payson, n. comb. 



Streptanthus flavescens Hook. Icones 1: t. 44- 1837; Torr 

 & Gray, Fl. N. Am. 1 : 77. 1838 ; Hook. & Arn. Bot. Beechey's 

 Voy. 322. 1841; Walp. Rep. 1: 129. 1842; Dietr. Syn. PI. 3: 



R.pnt 4- 65 18K6; Grav. Proc. Am 



730. 1843 : Torr. Pac. Rail 

 Acad 



Wats. Bot. King's Exp. 430. 1871. 



S. procerus Brewer, Proc. Am. Acad. 6 : 519. 1866. 

 Thelypodium flavescens Wats. Bot. King's Exp. 25. 1871, not 

 Jepson; Brewer & Wats. Geol. Survey Calif. Bot. 1: 38. 1876; 



Greene, Fl. Franciscan 

 N. Am. I 1 : 177. 1895. 



Robinson in Gray, Syn. Fl 



