



CATALOGUE OF SPECIES. 189 



Eriogonum wrightii subscaposum Wats. Bot. Cal. ii. 29 (1880). Typo localities, 

 "in the Sierra Nevada and W. Nevada." 

 At Soda Springs in the Sierra Nevada (No. 1603). Verified by W. M. Canby. 



Oxytheca inermis Wats. Froc. Amer. Acad. xii. 273 (1877). Typo locality, 

 "California, probably on Mount Diablo." 

 Near Havilah (No. 1080). 



Oxytheca perfoliata Torr. & Gr. Proc. Amer. Acad. viii. 101 (1870). Typo local- 

 ity, "Unionville, Humboldt, and Truckee valleys [Nevada], on the borders of the 

 desert." 



Between Victor and Stoddard Wells (No. 150). 



Oxytheca spergulina (Gray) Froc. Amer. Acad. vii. 389 (1808), under Eriogonum ; 

 Greene, El. Fran. 153 (1891). Typo locality, "dry sandy soil, banks of Big Creek, be- 

 low the Mariposa Big-tree Grove," California. 



Near Mineral King (No. 1153) and about Whitney Meadows (1G22). The only 

 technical character that distinguishes Oxytheca from Eriogonum, namely, tbe presence 

 of terminal awns upon the lobes of the involucre, 1 if applied to tliis species and to 

 Oxytheca inermis, necessitates their reference to Eriogonum, yet there can be no doubt 

 that their true genetic affinity is with Oxytheca."* 



Chorizanthe brevicornu Torr. Bot. Mex. Bound. 177 (1859). Typo locality, "on 

 the Gila River." 

 In Death Valley (Nos. 200, 477), and at many other points in the desert. 



Chorizanthe perfoliata Gray, Proc. Bost. Soc. Nat. Hist. vii. 148 (1859). Type 

 locality, "at Fort Tejon and vicinity, California." 

 In Tehachapi Canon (No. 1136). 



Chorizanthe rigida (Torr.) Pac.R. Rep. iv. 133 (1857), under Acantlioaonum; Torr. 

 & Gr. Proc. Amer. Acad. viii. 198 (1870). Type locality, "on Williams' river, a 

 fork of the Colorado, Western New Mexico," now Arizona. 



This is one of the commonest annuals of the desert, growing on gravelly mesas and 

 washes in the dryest and hottest locations where any vegetation whatever can exist. 

 It is a characteristic plant of the Lower Sonoran zone. Specimens were collected 

 between Stoddard Wells and Daggett, California (No. 157), and in the valley of the 

 Virgin River, Nevada (No. 1909). 



Chorizanthe thurberi (Benth.) in DC. Frodr. xiv. 27 (185G), under Centrostegia — 

 Gray MS.; Wats. Proc. Amer. Acad. xii. 209 (1877). Type locality, "in collibua 

 arenosis ad San Felipe California;." 



On the Darwin Mesa (No. 798), in Cottonwood Canon, Panamint Mountains (No. 

 964), and between Kernville and Havilah (No. 1045), 



Chorizanthe uniaristata Torr. & Gr. Proc. Amer. Acad. viii. 195 (1870). Type 

 locality, "New Idria, California, in very dry places." 

 In Walker Basin (No. 1090). 



Chorizanthe watsoni Torr. & Gr. Proc. Amer. Acad. viii. 199 (1870). Type 

 locality, "Nevada, on the borders of the desert, Humboldt, Reese-River, and Graos 

 valleys." 



Between Mohave and the mouth of Tehachapi Canon (No. 1135). 



* Wats. Proc. Amer. Acad. xx. 371 (1885). 

 « See Greene, Fl. Fran. 152, 153 (1891). 



