1922] 



PAYSON — STUD 



307 



Calif. Herb.); vicinity of Berkeley, April 26, 1907, Walker 570 

 (Univ. Calif. Herb.) ; Lake Merced, San Francisco, April 25, 1903, 

 Tracy 1780 (Univ. Calif. Herb.) ; near San Francisco, 1868-69, 

 Kellogg & Harford 54 (Mo. Bot. Gard. Herb.) ; Marine Hospital, 

 San Francisco, April 10, 1904, Hall 4811 (Univ. Calif. Herb.); 

 cliffs west of Colma, March 15, 1901, Chandler 807 (Univ. Calif. 

 Herb.); Stanford Univ., March, 1901, Abrams 1147 (Mo. Bot. 

 Gard. Herb.) ; Gigling Station east of Del Monte, May 11, 1903, 

 Heller 6709 (Rky. Mt. Herb, and Mo. Bot. Gard. Herb.) ; coast 

 hills, San Luis Obispo County, May, 1884, Summers (Univ. 

 Calif. Herb, and Rky. Mt. Herb.) ; San Luis Obispo, June, 1886, 

 Summers (Univ. Calif. Herb.) ; San Luis Mountain, April, 1886, 

 Summers (Univ. Calif. Herb.) ; Santa Maria, March 8, 1886, 

 Summers (Univ. Calif. Herb., Mo. Bot. Gard. Herb., and Rky. 

 Mt. Herb.) ; White Sulphur Springs, April, 1895, Sonne (Univ. 

 Calif. Herb.). 



18b. Var. rigidus (Greene) Payson, n. comb. 



Thelypodium rigidum Greene, Pittonia 1 : 62. 1887 ; Fl. Fran- 



ciscana, 264. 1891. 



T. lasiophyllum (Hook. & Arn.) Greene var. rigidum Robinson 



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



Guillenia rigida Greene, Leafl. Bot. Obs. & Crit. 1 : 228. 1906. 



Rather stout and very rigid, 3-10 dm. high, glabrous above: 

 pods ascending, straight or curved outwards, stout ; on very short 



pedicels. 



Distribution: north central California. 



Specimens examined: 



California: 4 miles east of Williams, Colusa County, April 12, 

 1917, Ferris 504 (Univ. Calif. Herb, and Mo. Bot. Gard. Herb.) ; 

 Collinsville, May 30, 1893, Brandegee (Univ. Calif. Herb.) ; Liv- 

 ermore, 1892, Bioletti (Univ. Calif. Herb.). 



18c. Var. utahensis ( Ry db . ) Payson, n. comb. 



Sisymbrium deflexum Gray, Bot. Ives' Rept. 6. 1860, not Har- 

 vey. 



Thelypodium lasiophyllum Robinson in Gray, Syn. Fl. N. Am. 



I 1 : 177. 1895, in part. 



T. utahense Rydb. Bull. Torr. Bot. Club 29: 233. 1902; Rydb. 

 Fl. Colo. 167. 1906 ; Rydb. Fl. Rocky Mountains, 367. 1917. 



Glabrous or nearly so: leaves usually thin, more or less mem- 

 branous, lobes usually rounded and obtuse: pods reflexed, usu- 



