238 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Zonal distribution: Arid Transition. 



A form of this from the region of Mount Stuart, represented by Elmer's l()96,Brandegee's 

 1050, and Sandiwrg & Leiberg's 813, is distinguished l)y having small compact umbels and 

 rather narrow lanceolate or lance-ovate leaves. It perhaps merits recognition as a 

 subspecies. 



Another form of the species, which includes Watson's 351, Whited's 1149 and 1415, and 

 Brandegee's 1048, is characterized by unusually small and broad leaves, 2 to 4 cm. long, and 

 small compact umbels of smaller flowers. Doctor Watson has labeled his .specimen variety 

 simplex, under which name the plant may be known. 



20a. Eriogonum heracleoides angustifolium (Nutt.) Torr. & Gr. Proc. Am. Acad. 

 8:159. 1870. 

 Eriogonum angustifolium Nutt. Journ. Acad. Phila. IT. 1: 164. 1847. 

 Type locality: "Western slope of the Rocky Mountains." Collected l)y Nuttall. 

 Range: Washington, Oregon, Idaho. 

 Specimens examined: Bickleton, SuksdoifA^Hi. 



21. Eriogonum tolmieanum Hook. Fl. Bor. Am. 2: 134. 1838. 



Eriogonum umhcllaluin mojtoccplialum Torr. & Gr. Proc. Am. Acad. 8: KiO. 1870. 



Type locality: "Banks of the Walla Walla River, among Artemisia."' Collected by 

 Tolmie. 



Range: Washington to California^ 



Specimens examined: Walla ^Valla River, Tolmie; Yakima region, Tweedy, October, 

 1882. 



22. Eriogonum umbellatum Torr. Ann. Lye. N. Y. 2: 241. 1828. 

 Eriogonum latum Small; Rydberg, Mem. N. Y. Bot. Gard. 1: 121. 1900. 

 Type locality: "Near the Rocky Mountains." Collected by James. 

 Range: Washington and Montana to California and Colorado. 



.Specimens examined: Stehekin, Whited 1383: Wenache Mountains, Whited 1167; 

 Tumwater Canyon, (Sa/M^ic/y/ cfc Leiberg52\; Mount Adams, F/rin049; Henderson, August 

 9, 1892; Big Klickitat River, Cotton 147(i. 



Zonal distribution: Hudsonian. 



22a. Eriogonum umbellatum hypoleium subsp. nov. 



Leaves green on botli sides, sparingly jjubescent on the margins and petioles. 



Specimens examined: Wenache Mountains, Whited 727, July 17, 1898 (type, depos- 

 ited in the United States National Herbarium); Mount Stunvt, Elmer 1192, August, 1898. 



22b. Eriogonum umbellatum majus Bcnth. in DC. Prod. 14: 11. 1856. 



Eriogonum subalpinum Greene, Pittonia 3: IS. 1896. 



Type locality : " In montibus scopulosis region, sup. fl. Platte, Sweetwater, etc. (Gordon, 

 Fremont, Burke, Geyer)." 



Range: Washington to Montana and Colorado. 



Specimens examined: Cascade Mountains, latitude 49°, Lyall; Mount Stuart, Elmer 

 1193; Mount Chapaca, Elmer 586; Yakima region, Tweedy, August, 1882; Nason Creek, 

 Sandberg cfe Leiberg 686; without locality, Vasey in 1889; Mount Carlton, Kreager2S6. 



23. Eriogonum stellatum Benth. Trans. Linn. Soc. 17: 409. 1837. 

 Eriogonum croceum Small, Bull. Torr. Club 25: 43. 1898. 



Type locality: "Interior of northwest America." Collected by Douglas. 

 Specimens examined: Blue Mountains, Piper 2447. 

 Zonal distribution: Arid Transition. 



