FLOWERING PLANTS AND FERNS OF ARIZONA 485 



typical form of the species, which has been collected near Navajo 

 Bridge {Peebles 14647), and m var. laxiflorus A. Gray (Phaca laxvflara 

 Rydb.), the leaflets are usually broadly obovate and the corolla usually 

 purple. The pods are very short-stipitate in var. laxifloruSj of which 

 the tvpe was collected near Beaver Dam, Mohave County, altitude 

 about 1,800 feet (Palmer 104). 



This species is reported to prefer selenifoerus soils and is probably 

 poisonous. 



In a paper published after this treatise was prepared ^Porter, C. L. A new 

 species of Astragalus from Arizona. Madrono 6:18. 1941), A. beathii C. L. 

 Porter is described. Its relationship is to A. preussii and it is characterized by 

 having many erect stems from a strong taproot, dark purple flowers, and elon- 

 gate, straight, cylindric, sessile or subsessile pods. The species is based on a 

 collection near Cameron, Coconino County (Goodding 34-39). 



47. Astragalus praelongus Sheldon, Minn. Geol. and Xat. Hist. Sur- 



vey Bot. Studies 1: 23. 1894. 



Jonesiella praelonga Rydb., North Amer. Fl. 24: 404. 1929. 

 Jonesiella mearnsii Rydb., ibid. p. 403. 



Apache County to Mohave and Yavapai Counties, 3,000 to 6,300 

 feet, common, May to July. Southern Utah and Nevada. Xew 

 Mexico, and Arizona. 



A coarse, ill-smelling plant with cream-colored flowers, resembling 

 A. preussii, but with walls of the large pods thicker, almost woody. 

 This plant, preferring, if not confined to seleniferous soils, has been 

 proved by experiments with sheep to be very toxic. 



48. Astragalus brandegei Porter in Port, and Coult., Svn. Fl. Colo. 24. 



1874. 



Atelophragma brandegei Rvdb., Torrev Bot. Club Bui. 32: 660. 

 1905. 



Bangharts Ranch (Del Rio), Yavapai County {Rusby 572), about 

 4,500 feet, May and June. Colorado, Utah, Xew Mexico, and 

 central Arizona. 



49. Astragalus cobrensis A. Gray, PI. Wright. 2: 43. 1853. 



Atelophragma cobrense Rvdb., Torrev Bot. Club Bui. 55: 162. 

 1928. 



White Tail Canyon, Chiricahua Mountains, sandy soil under oak 

 and walnut (Maguire et al. 11079), ^-Vpril and May. Southwestern 

 Xew Mexico and southeastern Arizona. 



In the collection cited, the type of var. maguirei Kearney, the 

 herbage and pods are more pubescent, with longer and more spreading 

 hairs, than in specimens of A. cobrensis from New Mexico. The 

 Arizona form may prove to be a distinct species. 



50. Astragalus rusbyi Greene, Calif. Acad. Sci. Bui. 1: S. 1884. 



Atelophragma rusby i Rvdb., Torrev Bot. Club Bid. 55: 162. 

 1928. 



San Francisco Peaks, Flagstaff, and Williams to Grand Canyon 

 (Coconino County), 7,000 to 8,000 feet, June to September, type from 

 Mount Humphreys (Rusby 573). Known only from northern Arizona. 



