1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 303 



as species. The only difference is in the petals; and by these 

 the present plant would stand well in Streptanthus if its habit 

 and narrow, terete pods were not those of the annual Thelypods 

 precisely." Jepson followed Greene in his interpretation of the 

 specific limits involved. The characters used by Greene and Jep- 

 son to keep the species apart, namely relative length of the sepals 

 and petals and glabrous or hirsute pods, will not serve since there 

 seems to be no correlation between them. Nor do these characters 

 correlate with leaf texture and outline. In like manner the 

 author can find no distinguishing characteristics upon which to 

 separate Caulanthus procerus. 



17. C. anceps Payson, n. name. 



Thelypodium Lemmoni Greene, West. Am. Scientist 3: 156. 

 1887; Greene, Fl. Franciscana, 263. 1891; Robinson in Gray, 

 Syn. Fl. N. Am. I 1 : 178. 1895, not Caulanthus Lemmoni Wats. 



Annual, glabrous and glaucous or sparsely pilose near the base : 

 stems erect, simple or sparingly branched upwards, often stout, 

 6-1S dm. high: radical and lower stem-leaves narrowed to a short 

 petiole, somewhat lanceolate in general outline, sinuate-dentate, 

 often deeply lobed near the base, 6-15 cm. long; upper leaves 

 sessile or nearly so, narrowly lanceolate, denticulate or subentire : 

 sepals spreading, purple, with scarious margins, oblong, obtuse, 

 glabrous, 3-4 mm. long, the outer pair slightly exceeding the 

 inner; petals whitish, oblanceolate, obtuse, 4-5 mm. long; fila- 

 ments linear, 2.5-3 mm. long, anthers about 1.5 mm. long, not 

 apiculate; nectar glands very small: inflorescence shortly race- 

 mose, lax, elongating at maturity; pedicels slender, at first hori- 

 zontal, later either reflexed or ascending, 5-6 mm. long: pods 

 erect or pendent, terete, glabrous or sparsely hirsute, subsessile, 

 3-5 cm. long; style tapering to the apex, 2-3 mm. long, stigma 

 small, slightly 2-lobed, lobes extending over the placentae. 



Distribution: western California. Type: Mr. & Mrs. J. G. 

 Lemmon from Lemmon's Ranch in the mountains of San Luis 

 Obispo County. 



Specimens examined: 



California: Zapato Chino Creek, March 27, 1893, Brandegee 

 (Univ. Calif. Herb.) ; Estrella Plains, San Luis Obispo County, 

 March 24, 1901, Barber A7 (Univ. Calif. Herb.). 



18. C. lasiophyllus (Hook. & Arn.) Payson, n. comb. 

 Turritis ( ?) lasiophylla Hook. & Arn. Bot. Beechey's Voy. 321. 

 1841; Walp. Rep. 1: 130. 1842; Dietr. Syn. PI. 3: 689. 1843. 



