238 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Zonal distribution: Arid Transition. 



A form of this from the region of Mount Stuart, represented by Ehner's 1096, Brandegee's 

 1050, and Sandlierg & Leibei^'s 813, is distinguished by having small compact umbels and 

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

 sulwpecies. 



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 bniad 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 ang^ustifolium (Nutt.) Torr. & Gr. Proc. Am. Acad. 

 8:159. 1870. 

 Eriogonum anguslifolium Nutt. Journ. Acad. Phila. 11. 1: 164. 1847. 

 Type ix)calit»-: "Western slope of the Rocky Mountains." Collected by Nuttall. 

 Range: Washington, Oregon, Idaho. 

 Specimens examined: Bickleton, <!?MA-W«r/'4.%. 



21. Eriogonvim tolmieaniun Hook. Fl. Bor. Am. 2: 134. 1838. 



Eriogonnm vmhellatuni tnonocephalum Torr. & Gr. Proc. Am. Acad. 8: 160. 1870. 



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

 Tolmie. 



Range: Washington to California? 



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

 1882. « 



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

 Eriogonum Mum Small; Rydl)erg, Mem. N. Y. Bot. Gard. 1: 121. 1900. 

 Type ix)cality: "Near the Rocky Mountains." Collected by James. 

 Range: Washington and Montana to California and Colorado. 



Specimens examined: Stehckin, Whited 1383; Wenache Mountains, Whited 1167; 

 Tumwater Canyon, 5a7Mi6crjf cfe lyeiberg 521 ; Mount Adams, F/e« 1049; //eri^rson, August 

 9, 1892; Big Klickitat River, CoUan 147(5. 



Zonal distribution: Iludsonian. 



22a. Eriogonum umbellatum hypoleium subsp. nov. 



Leaves green on Ixjth sides, sparingly pulx>scent on the margins and petioles. 



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

 ited in the United States National Herbarium); Mount Stu&rt, Elmer 1192,Augu.st, 1898. 



22b. Eriogonum umbellatum majus Benth. in DC. Prod. 14: 11. 18.56. 



Eriogonum suW/nnwm Greene, Pittonia 3: 18. 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 & Leiberg 686; without locality, Vasey in 1889; Mount Carlton, Kreager 236. 



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. 



