302 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



[Vol. 9 



Caulanthus procerus Wats. Bot. King's Exp. 27. 1871; Rob- 

 inson in Gray, Syn. Fl. N. Am. I 1 : 173. 1S95. 



Thelypodium Hookeri Greene, Fl. Franciscana, 263. 1891; 

 Robinson in Gray, Syn. Fl. N. Am. I 1 : 177. 1895. 



T. Greenei Jepson, Fl. West. Mid. Calif. 212. 1901, and ed. 



2,181. 1911. 



T. flavescens Jepson, Fl. West. Mid. Calif. 212. 1901, and ed. 



2,181. 1911. 



Guillenia flavescens Greene, Leafl. Bot. Obs. & Crit. 1: 228. 

 1906. 



G. Hookeri Greene, Leafl. Bot. Obs. & Crit. 1 : 228. 1906. 



Annual, rather stout, glabrous and glaucous or sparsely hir- 

 sute: stems erect, simple or branching in the inflorescence, 3-12 

 dm. high : radical leaves petioled, blade lanceolate to oblanceolate 

 in outline, sinuate-pinnatifid, lyrate or coarsely laciniate, 5-22 

 cm. long; cauline leaves sessile, shortly petioled or even slightly 

 auriculate at the base, deeply toothed to subentire: sepals pale 

 yellow, lanceolate, acute or acuminate, 7-11 mm. long, glabrous; 

 petals light yellow, 9-15 mm. long, claw rather broad, blade nar- 

 row, crisped, recurved, acute or acuminate: stamens included, 

 anthers 2.5-4 mm. long, apiculate : inflorescence rather lax, race- 

 mose from the first; pedicels rather stout, curved upwards, 

 5-7 mm. long: pods erect, terete or somewhat 4-angled, glab- 

 rous or sparsely hirsute, subsessile, 4-8.5 cm. long, rather stout; 

 style tapering to the apex, 2-3.5 mm. long, stigma entire or 

 slightly 2-lobed : seeds not winged, cotyledons usually incumbent 

 with tip of radical more or less oblique, rarely obliquely accum- 

 bent. 



Distribution: west-central California in the vicinity of San 

 Francisco. Type: Douglas from Monterey. 



Specimens examined : 



California: May 4, 1907, K. Brandegee (Univ. Calif. Herb.); 

 Collinsville, Solano County, May 30, 1893, K. Brandegee (Univ. 

 Calif. Herb.); Antioch, Brandegee (Univ. Calif. Herb.); Byron 

 Springs, Contra Costa County, March 14, 1914, Eastwood 8813 

 (U. S. Nat. Herb.) ; Livermore, Michener & Bioletti (Univ. 

 Calif. Herb.). 



There seems no way of separating specifically the type of this 

 species collected by Douglas at Monterey and the plant de- 

 scribed by Watson from Benecia. Greene (Fl. Franciscana) 

 first called attention to the generic similarity of the two plants 

 and remarked: " . . . they are with difficulty held distinct 



