PIPER—-FLORA OF THE STATE OF WASHINGTON. 235 
SPECIMENS EXAMINED: Wenache, Whited 723, 1157; Similkameen Valley, Lyall in 1860; 
Lake Chelan, Lake & Hull 673; Coulee City, Henderson 2427; Loomis, Elmer 605; Alkali 
Lake, Sandberg & Leiberg 419; Clarks Springs, Kreager 123; without locality, Cooper in 
1853; Spokane, Sandberg; Piper 2811 Suksdorf’ 945; Watson 349; Sandberg, Heller & Mac- 
Dougal 903; Wawawai, Piper 1634, 1547; Waitsburg, Horner 433; Marcus, Areager 463. 
ZONAL DISTRIBUTION: Upper Sonoran. 
We have been quite unable to distinguish two species, as did Douglas, based on differences 
in degree of development of the bracts, and on the erect or spreading position of the calyx 
teeth. 
6. Eriogonum decumbens Benth. Trans. Linn. Soc. 17: 415. 1837. 
Eriogonum niveum decumbens Torr. & Gr. Proc. Am. Acad. 8: 174. 1870. 
Tyre Locauiry: “Columbia River.” Collected by Douglas. 
Rance: Washington and Oregon. 
SPECIMENS EXAMINED: Klickitat County, Leckenby; Sunnyside, Piper; without locality, 
Douglas. 
ZONAL DISTRIBUTION: Upper Sonoran. 
This plant is perhaps only a subspecies of £. niveum, but its habit is quite distinct. It is 
confined to sand hills where it forms large decumbent masses often 50 cm. in diameter. 
The leaves also are broader than in £. niveum. 
7. Eriogonum microthecum Nutt. Journ. Acad. Phila. IT. 1: 162. 1847. 
Typr Locaniry: “On the sides of hills in Oregon, east of Walla Walla.’”? Collected by 
Nuttall. 
Rance: Washington to California, New Mexico, and Nebraska. 
SPECIMENS EXAMINED: Ellensburg, Whited 553; Egbert Springs, Sandberg & Leiberg, 
July, 1893; Tampico, Henderson, July 31, 1892; Moses Lake, Sandberg & Leiberg, July, 1893; 
Parker, Elmer 1078; North Yakima, Piper 1879; Henderson, October 5, 1892; Watt, August, 
1895; without locality, Cooper; without locality, Vasey in 1889; Kiona, Cotton 734. 
ZONAL DISTRIBUTION: Upper Sonoran. 
We have seen no Washington specimens referable to 2. corymbosum Nutt. and believe 
that such references really apply to EL. microthecum. 
8. Eriogonum elatum Dougl.; Benth. Trans. Linn. Soc. 17: 413. 1837. 
Type Locauiry: “Columbia River.’’ Collected by Douglas. 
Rance: Washington to California and Nevada. 
SPECIMENS EXAMINED: Wenache, Whited, August, 1896; Ellensburg, Elmer 387; Whited 
276: Piper, July, 1897; White Bluff Ferry, Lake & Hull 677; North Yakima, Wait, August, 
1895; Steinweg in 1894; Peshastin, Sandberg & Leiberg, August, 1893; Rock Island, Sand- 
berg & Leiberg 424; near Chelan River, Watson 347; Columbia Valley, Lyall in 1860; Tahlk 
Plain, Cooper; without locality, Vasey in 1889; Umtanum Creek, Cotfon 820. 
ZONAL DISTRIBUTION: Upper Sonoran. 
9. Eriogonum nudum Dougl.; Benth. Trans. Linn. Soc. 17: 413. 1837. 
Type Locaiiry: “Plains of the Multnomah,’ Oregon. Collected by Douglas. 
Rance: Washington to California. 
SPECIMENS EXAMINED: North of Mount Adams, Henderson 2429. 
ZONAL DISTRIBUTION: Arid Transition. 
10. Eriogonum strictum Benth. Trans. Linn. Soc. 17: 414. 1887. 
Type Locatity: “Columbia River.’’ Collected by Douglas. The original label gives 
the locality “‘ Blue Mountains.” 
Rance: Blue Mountains of Washington and Oregon. 
SPECIMENS EXAMINED: Along Salmon River, Horner 482. 
11. Eriogonum vimineum Dougl.; Benth. Trans. Linn. Soc. 17: 416. 1837, 
Tyre Locauity: “Columbia River.’”’ Collected by Douglas. 
