FLOWERING PLANTS AND FERNS OF ARIZONA 247 



11. Eriogonum thomasii Torr., U. S. Rpt. Expl. Miss. Pacif. 5: 364. 



1857. 



Mohave County to Graham, Gila, Pima, and Yuma Counties, 

 3,000 feet or lower, March to April. Southern Utah to southeastern 

 California, Arizona, and Sonora. 



A small annual, common in the more desertic parts of the State, 

 in sandy soil. 



12. Eriogonum glandulosum Nutt. ex Benth. in DC, Prodr. 14: 21. 



1856. 



Eriogonum Jiexum M. E. Jones, Zoe 2: 15. 1891. 

 Eriogonum trichopes Torr. subsp. glandulosum Stokes, Gen. 

 Eriog. 25. 1936. 



Moenkopi, Coconino County, 4,700 feet, the type locality of E. 

 flexum (Jones in 1890), this being apparently the only collection of 

 E. glandulosum in Arizona. Colorado, Utah, and Arizona. 



13. Eriogonum in (latum Torr. and Frem. in Frem., Exped. Rocky 



Mount. Rpt. 317. 1845. 



Apache County to Mohave County, south to Graham, Pima, and 

 Yuma Counties, 3,500 feet or lower (occasionally considerably higher), 

 March to July. Utah and Arizona to southern California and Baja 

 California. 



Desert-trumpet, bladderstem, Indianpipe-weed. A familiar plant 

 on the rocky foothills and lower slopes of desert mountains, remark- 

 able for the inflated stem. 



14. Eriogonum trichopes Torr. in Emory, Mil. Reconn. 150. 1848. 

 Mohave County to Cochise, Pima, and Yuma Counties, 4,000 feet 



or lower, flowering almost throughout the year. Colorado and Utah 

 to Arizona, California, and northwestern Mexico. 



Often extremely abundant on the deserts and low hills, sometimes 

 covering large areas in nearly pure stand, as in northern Maricopa 

 County and northwest of Kingman, Mohave County. The hairlike, 

 many-branched inflorescence and very small, few-flowered involucres 

 are distinctive. 



15. Eriogonum ordii S. Wats., Amer. Acad. Arts and Sci. Proc. 21: 



468. 1886. 

 This seems to be known in Arizona only by the type collection, on 

 "sand dunes" near Fort Mohave, Mohave County (Lemmon in 1884). 

 Utah to western Arizona and southern California. 



16. Eriogonum clutei Rydb., Amer. Bot. 27: 61. 1921. 



Known, apparently, only from the type collection at Cameron, 

 Coconino County, "common in the driest places" (Clute 71a). 



17. Eriogonum pusillum Torr. and Gray, Amer. Acad. Arts and Sci. 



Proc. 8: 184. 1870. 



Eriogonum comosum M. E. Jones var. playanum M. E. Jones, 



Contrib. West. Bot, 11: 16. 1903. 

 Eriogonum reniforme Torr. and Gray subsp. pusillum Stokes, 



Gen. Eriog. 36. 1936. 



Hackberry and Kingman (Mohave Countv), Wickenburg (Mari- 

 copa County), 2,000 to 3,000 feet, April to May. Southern Utah, 

 Arizona, and southeastern California. 



