PIPER—FLORA OF THE STATE OF WASHINGTON. 575 
SPECIMENS EXAMINED: Cascade Mountains, Lyall in 1860; Peshastin, Sandberg & Leiberg, 
July, 1893; west Klickitat County, Suksdorf 640, 648, 649; Skamania County, Suksdorf 
2169; Mount Adams, Suksdorf 339, 643; Falcon Valley, Suksdorf 340, 397; Yakima region, 
Brandegee 857; without locality, Cusick 1821; without locality, Brandegee 854, 855, 859; 
Spokane County, Ramm, July, 1893; Bingen, Suksdorf 2247; Spokane, Piper 2379; Pull- 
man, Piper 1605; Waitsburg, Horner, August, 1896. 
ZONAL bistRIBUTION: Arid Transition. 
20. Aster stenomeres A. Gray, Proc. Am. Acad. 17: 209. 1882. 
lonactis stenomeres Greene, Pittonia 3: 246. 1897. 
Type tocauitry: “Rocky Mountains of Montana and Idaho, Burke, Watson.” 
Rance: Washington to Montana. 
SPECIMENS EXAMINED: Mount Carlton, Areager 280. 
ASTER PEREGRINUS Pursh. This is included in Gorman’s list of the plants of the 
Washington Forest Reserve. An examination of the specimen in the National Herbarium 
shows the collection to be a mixture of Erigeron salsuginosus and Aster foliaceus. 
AsTER ADSCENDENS Lindl. is included in Suksdorf’s list, but we question the identity of 
the specimens. 
MACHAERANTHERA. 
1. Machaeranthera canescens (Pursh) Greene, Pittonia 3: 59. 1896. 
Aster canescens Pursh, Fl. 2: 547. 1814. 
Type Locauity: “On the banks of the Missouri.” 
RANGE: Washington to Saskatchewan and Texas. 
SPECIMENS EXAMINED: Loomis, Elmer 608; Spokane, Piper, September, 1896. 
ZONAL bistRIBUTION: Arid Transition. 
la. Machaeranthera canescens viscosa (Nutt.). 
Dieteria viscosa Nutt. Trans. Am Phil. Soc. 7: 301. 1840. 
Aster canescens viscosus A. Gray, Syn. FI. 1': 206. 1884. 
Type Locauity: “Near Scott’s Bluff, on the Platte.” Collected by Nuttall. 
Rance: Washington to Wyoming and California. 
SPECIMENS EXAMINED: North Yakima, Watt, August, 1895; Henderson, October 5, 1892; 
Wenache, Whited 1331; Ellensburg, Whited 854; Rattlesnake Mountain, Cotton 478; 
Columbus, Suksdorf, June 10, 1886; Lake Chelan, Lake d& Hull, August 16, 1892; near 
mouth of Okanogan, Watson 197; Coulee City, Lake & Hull 691, Colville, Lyall in 1860; 
Spokane, Sandberg, Heller, & McDougal 912; Waitsburg, Horner 555; Wawawai, Piper 
1606; Almota, Piper, September, 1896. 
ZONAL DISTRIBUTION: Upper Sonoran. 
MADIA. TARWEED. 
Heads small, long-peduncled; disk-flower one ...--..-------+++-----+- 1. M. exiqua. 
Heads larger, sessile or short-peduncled: disk-flowers several. 
Leaves all or mostly alternate; ligules small. 
Rays 5 to 12; involucres campanulate. 
Akenes of the ravs broad; herbage lemon-scented ...----- 2. M. citriodora. 
Akenes of the rays compressed; herbage heavy-scented. 
Heads densely congested .....---------------+-+--- 4. M. sativa. 
Heads loosely racemose .....------------++-+-+----- 3. M. racemosa. 
Rays 1 to 5, sometimes none; involucre laterally compressed ; 
heads densely glomerate. 
Stems glandular to the base; glomerules loosely cymose ... 5. M. ramosa. 
Stems glandular above, glomerules racemose .-...------- 6. M. glomerata. 
Leaves all or mostly opposite; ligules large .......-.------------- 7. M. madioides. 
