PIPER FLORA OF THE STATE OF WASHINGTON. 235 



Specimens examined: Weaachc, Whited 723, 1157; Similkameen Valley, Lyall in 1860; 

 Lake Chelan, Lalce cfe FIull 673; Coulee City, Henderson 2427; Loomis, Elmer 605; Alkali 

 Lake, Sandberg & Leiherg 419; Clarks Springs, Kreager 123; without locality, Cooper in 

 1853; Spokane, Sandherg; Piper 2811 Suhsdorf 945; Watson 349; Sandherg, Heller cC- Mac- 

 Dougal 903; Wawawai, Pi/)^/' 1634, 1547; Waitsbuig, //or/icr 433; Marcus, /irmr/p/' 463. 



Zonal distribution: Upper Sonoran. 



We have been c|iiite unable to distinguish two species, as did Douglas, based on diflerences 

 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. 

 Eriogoniiin nireiirn dieunihins Torr. & Gr. -Proc. Am. Acad. 8: 174. 1870. 

 Type locality: "Columbia River." Collected by Douglas. 



Range: Washington and Oi'egon. 



Specimens examined: Klickitat (\ninty, LpcA-e/i/*//.- Sunn\-side, Pi/vr; without localitv, 

 Douglas, 



Zonal distribution: Upper Sonoran. 



This plant is perhaps only a subspeci(>s of E. 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 an\ broader than in E. niveum. 



7. Eriogonum microthecum. Nutt. Journ. Acad. Phila. XL 1: 162. 1847. 



Type locality: "On the sides of hills in Oregon, east of Walla Walla." Collected by 

 Nuttall. 



Range: Washington to California, New Mexico, and Nebraska. 



Specimens examined: Eliensburg, Whited 553; Egbert Springs, Sandherg d' Leiherg, 

 July, 1893; Tampico, Henderson, July 31, 1892; Moses Lake, Sandherg cf' Leiherg, July, 1893; 

 Parker, Elmer 1078; North Yakima, Piper 1879; Henderson, October 5, 1892; Walt, 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 E. rori/mJiosinn Nutt. and believe 

 that sucli references really apply to PJ. microthecum. 



8. Eriogonum elatum Dougl.; Benth. Trans. Linn. Soc. 17: 413. 1837. 

 Type locality: "Columbia River." Collected by Douglas. 



Range: Washington to California and Nevada. 



Specimens examined: Wenache, TFAi/«(^, August, 1896; Elleasburg, £'Zwer 387; WMted 

 276; Pi>/-, July, 1897: White Blutf Ferry, Lai-e cf; /]?;/// 677; North Yakima, TFa«, August, 

 1895; Steinweg in 1894; Peshastin, Sandherg d- Leiherg, August, 1893; Rock Island, Sand- 

 berg <fc Leiherg 424; near Chelan River, Watson 347; Coluinl)ia Valley, Lyall in 1860; Tahlk 

 Plain, Cooper; without locality, Vasey in 1889; Umtanum Creek, Cotton 820. 



Zonal distribution: Upper Sonoran. 



9. Eriogonum nudum Dougl.; Benth. Trans. Linn. Soc. 17: 413. 1837. 

 Type locality: "Plains of the Multnomah," Oregon. Collected by Douglas. 

 Range: Washington to California. 



Specimens examined: North of Mount Adams, Henderson 2429. 

 Zonal distribution: Arid Transition. 



10. Eriogonum strictum Benth. Trans. Linn. .Soc. 17: 414. 1837. 



Type locality: "Columbia River." Collected l)y Douglas. The original label gives 

 the locality "Blue Mountains." 



Range: Blue Mountains of Washington and Oregon. 

 Specimens examined: Along Salmon River, Horner 432. 



11. Eriogonum vimineum Dougl.; Benth. Trans. Linn. Soc. 17: 416. 1837. 

 Type locality: "Columbia River." Collected by Douglas. 



