362 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



4. Draba petrophila Greene, Pittonia 4: 17. 1! 

 Pinaleno Mountains, Graham County (Rothrock 111), Rincon and 



Santa Rita Mountains (Pima County), 6,000 feet and higher, chiefly 

 in crevices of rocks. 



There occur in Arizona both the typical form and the var. viridis 

 (Heller) C. L. Hitchc (D. viridis Heller). The latter, which occurs 

 in the Santa Catalina and Huachuca Mountains of Arizona, and in 

 adjacent Mexico, is distinguished by its longer styles and stiff simple 

 or forked hairs on the valves of the pod (Goodding 134). 



5. Draba helleriana Greene, Pittonia 4: 17. 1899. 



White Mountains (Apache County) to the mountains of Cochise 

 and Pima Counties, usually among rocks in coniferous forests, 6,000 

 to 11,500 feet, July to September. New Mexico and Arizona. 



The Arizona forms are: (1) var. patens (Heller) Schulz (D. patens 

 Heller), from the White Mountains; (2) var. Humeri C. L. Hitchc, 

 from the Chiricahua Mountains to the White Mountains; and (3) var. 

 bifurcata C. L. Hitchc, from Monument Peak, Chiricahua Mountains. 

 These three forms are separable as follows: Var. bifurcata is charac- 

 terized by unbranched or forked hairs, only, on the cauline leaves, 

 both the other entities having many 4-rayed trichomes. But, whereas 

 var. blumeri has the crowns much thickened by persistent leaf bases 

 of several years' duration, the var. patens is seemingly a short-lived 

 perennial, without such marcescent leaves. 



6. Draba rectifructa C. L. Hitchc, Wash. Univ. Pubs. Biol. 11: 110. 



1941. 



Draba montana S. Wats., Amer. Acad. Arts and Sci. Proc 14: 

 289. 1879. Not Bergeret, 1786. 



Kaibab Plateau between Jacobs Lake and the Grand Canyon, 

 Coconino County, 8,400 feet (Kearney and Peebles 13680), August. 

 Colorado, New Mexico, Utah, and northern Arizona. 



7. Draba crassifolia Graham, Edinb. New Phil. Jour. 1829: 182. 



1829. 



San Francisco Peaks, 10,000 to 12,000 feet, July. Greenland to 

 Alaska, south to Colorado and northern Arizona. 



A collection on the San Francisco Peaks (Leiberg 5758) is cited by 

 Schulz under var. albertina (Greene) O. E. Schulz (D. albertina Greene). 

 The variety differs merely in its more copious pubescence of stellate 

 hairs, the typical form having simple or merely bifurcate hairs. 



8. Draba reptans (Lam.) Fernald, Rhodora 36: 368. 1934. 



Arabis reptans Lam., Encycl. 1: 222. 1783. 

 Draba caroliniana Walt., Fl. Carol. 174. 1788. 



Pinaleno Mountains, Graham County (Maguire 10193), Sabino 

 Canyon, Pima County (Griffiths 2571), occasional in Arizona as in 

 most of the other Western States. 



Easily distinguished from D. cuneifolia by the more nearly entire 

 leaves and the glabrous inflorescence. 



9. Draba platycarpa Torr. and Gray, Fl. North Amer. 1: 108. 1838. 

 Mountains of Pima County, 3,500 to 5,000 feet, March to April. 



Texas and southern Arizona. 



