FLOWERING PLANTS AND FERNS OF ARIZONA 251 



(Greene in 1889), type of E.jerrissii from Betatakin, Navajo County 

 (Clute 10c). Definitely known only from Arizona. 



Perhaps too near E. stellatum Benth. Both species appear like 

 luxuriant developments of E. umbellatum Torr. 



37. Eriogonum ovalifolium Nutt., Acad. Nat. Sci. Phila. Jour. 7: 50. 



1834. 

 Carrizo Mountains (Apache County) to Pagumpa Springs (Mohave 

 County), 5,000 to 7,000 feet, April to June, apparently rather rare in 

 Arizona. Alberta to New Mexico, northern Arizona, and Cali- 

 fornia. 



38. Eriogonum lachnogynum Torr. ex Benth. in DC, Prodr. 14: 8. 



1856. 

 Petrified Forest, Apache County (Ward in 1901, A. S. Hitchcock 8), 

 rare in Arizona, June. Kansas to Texas, Colorado, and northeastern 

 Arizona. 



*39. Eriogonum villiflorum A. Gray, Amer. Acad. Arts and Sci. Proc. 



8: 630. 1873. 

 Apparently not yet collected in Arizona, but the type came from 

 southern Utah not far from the Arizona line. 



40. Eriogonum pulvinatum Small, Torrey Bot. Club Bui. 25: 44. 



1898. 



Eriogonum villiflorum A. Gray var. candidum M. E. Jones, 



Zoe 4: 282. 1893. 

 Eriogonum shockleyi S. Wats, subsp. candidum Stokes, Gen. 



Eriog. 96. 1936. 



Twenty-five miles north of Ganado, Apache Coimty, 5,900 feet 

 (Peebles 13496), 15 miles north of Holbrook, Navajo County (Ward 

 in 1901), June. Utah and northeastern Arizona. 



Plant densely cespitose, forming hummocks about a foot in diam- 

 eter, the perianth yellowish white. Perhaps only varie tally distinct 

 from E. shockleyi. 



41. Eriogonum plumatella Dur. and Hilg., Rpt. Expl. Miss. Pacif. 5 3 : 



14. 1855. 



Eriogonum palmeri S. Wats., Amer. Acad. Arts and Sci. Proc. 

 12: 267. 1877. 



Mohave County, near Kingman and southeastward to the Aquarius 

 Mountains (Eastwood 18371, Peebles and Kearney 12581, 12604, 

 1 2605), about 3,500 feet, in dry thickets. Southern Utah and western 

 Arizona to southern California. 



The specimens cited represent both the typical form, with lanate 

 inflorescence branches and the involucres copiously lanate-ciliatej 

 and var. jaegeri (Munz and Johnston) Stokes, with inflorescence 

 branches glabrous except at the nodes and the involucres sparsely 

 eiliate. 



*42. Eriogonum thompsonae S. Wats., Amer. Nat. 7: 302. 1873. 



Known only from the type collection at Kanab, Utah, very near the 

 Arizona line (Thompson in 1873). 



