1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 283 



to the septum, 4-7 cm. long; stipe 1-7 mm. long; style very- 

 short, stigma capitate, entire: cotyledons in seed obliquely ac- 



cumbent. 

 Distribution: from central Utah to southeastern Oregon. 



Type: Watson 114 from "shaded slopes in the Wahsatch and 



Uinta Mountains," Utah. 



Specimens examined : 



Utah: American Fork Canyon, July 31, 1880, Jones 1358 (Mo. 



Bot. Card. Herb.). 



Oregon: Wallowa Mountains, near the lake, July 31, 1899, 

 Cusick 2292 (Univ. Calif. Herb, and Mo. Bot. Gard. Herb.). 



CAULANTHUS 



Caulanthus Wats. Bot. King's Exp. 27. 1871; Brewer & 

 Wats. Geol. Survey Calif. Bot. 1: 36. 1876; Robinson in Gray, 



Syn. Fl. N. Am. I 1 : 172. 1895; Rydb. Fl. Rocky Mountains, 364. 



1917. 



Streptanthus Gray, Proc. Am. Acad. 6: 182. 1866, in part; 

 Greene, Fl. Franciscana, 256. 1891, in part. 



Stanfordia Wats, in Brewer & Wats. Geol. Survey Calif. Bot. 



2: 479. 1880. 



Thelypodium Greene, Fl. Fi 



inson in Gray, Syn. Fl. N. Am 



Rob 



Jeps 



West. Mid. Calif. 212. 1901, and ed. 2, 180. 1911; Rydb. Fl. 

 Rocky Mountains, 366. 1917, in part. 



Guillenia Greene, Lean. Bot. Obs. & Crit. 1: 227. 1906, in part. 



Mostly annual herbs, frequently glabrous and glaucous or in 

 some species pubescent with simple trichomes. Stems branched 

 or unbranched, slender, stout or conspicuously inflated. Except in 

 a few species the radical leaves do not form a conspicuous rosette 

 and are not sharply differentiated from the cauline leaves. Cau- 

 line leaves amplexicaul, sessile or petioled. Flowers purple, white 

 or yellow; calyx segments equal or quite unequal; petals fre- 

 quently narrow and crisped, blade usually not differentiated from 

 the claw. Inflorescence usually racemose. Pods divaricate, 

 erect or deflexed, usually glabrous, terete (if flattened not over 

 3 mm. wide), sessile or nearly so; style usually short, stigma en- 

 tire or 2-lobed with the lobes extended over the center of the 



valves; cells of the septum usually short and the boundaries 

 straight. Seeds wingless or narrowly winged ; cotyledons usually 

 obliquely incumbent. Generic type: C. crassicaulis (Torr.) Wats. 



