318 COMPOSITE EBIGERON 



single heads : leaves narrowly linear, elongated, entire, attenuate at the 

 base, the lowermost tapering into a slender petiole: heads 5-6 lines in 

 diameter: bracts of the involucre linear, very acute, densely hirsute: rays 

 numerous, 6 lines long, white to purple. Arid plains between the Cascade 

 and Rocky mountains, British Columbia to California and New Mexico. 



M. +*. Tufted, stems very short and densely leafy, bearing 

 simple and monocephalous scapiform or few-leaved flowering stems : 

 leaves narrowly spatulate-linear : heads large: rays 25-50 not very 

 narrow, 3-4 lines long. 



E. Poliospermns Gray Syn. Fl. i, Pt. 2, 210. Soft-hispid throughout 

 with white hairs : stems numerous, from a branched rootstock, an inch or 

 le c s long, very leafy: leaves spatulate to lanceolate, 2-6 lines long, on 

 slender petioles 1-2 inches long : scapose peduncle 2-4 inches long : heads 

 half -inch or more in diameter: bracts of the involucre cetaceous, densely 

 hispidulous: raya 20-30, blue- violet to almost white: achenes densely 

 white-villous : outer pappus slender-squammellate, fully as long as the 

 breadth of the achene covered by the copious white silky hairs of the 

 achene. On dry rocky ridges along the Columbia river from The Dalles 

 eastward. 



E. Chrysopsidis Gray 1. c. Chrysop&is hirtella DC. Hirsute with 

 white spreading hairs, stems scape-like, leafy at the base, 2-4 inches high : 

 leaves spatu ate, mostly obtuse, including the petiole 1-3 inches long, 

 usually about a line wide at the summit: heads solitary, terminal: in- 

 volucre open-companulate, its bracts narrow, numerous 3-5 lines long, 

 hirsute: rays, 4J-50, golden yellow, 6-8 lines long: achenes barely pubes- 

 cent or hirsutulous : outer pappus merely setulose. On high stony ridges, 

 Eastern Oregon in the John D?y country. 



.*- +- -- Dwarf, cespitose from a multicipital candex, with 

 monocephalous flowering stems, often scapose : radical leaves dissected : 

 pappus simple. 



E. compositus Pursh Fl. ii, 535. Herbage hirsute to glabrate and 

 more or less viscidulous : stems very short, from a somewhat woody creep- 

 ing base, densely leafy : leaves fan-shaped in outline, usually 1-3-usrnately 

 parted into linear or short and narrow spatulate lobes, 2-6 lines long, on 

 Jong slender hispid-ciliate petio'es; the few on the erect flowing stems 3- 

 lobed, or entire and linear : involucre 3-4 lines high, sparsely hirsute : rays 

 40-60 not very narrow, white purple or violet mostly 3-4 lines long. On 

 cliffs, Artie seacoast, Greenland, and Spitzbergen to the higher moun- 

 tains of Washington, Oregon and California and the Rocky mountains. 



Var. discoideus Gray. Am. Jour Sci. Ser. 2, xxxi'i, 237. Rays want- 

 ing or abortive : headq commonly smaller. Some range as the radiate 

 form, often growing with it. 



- H- - +- Dwarf or low species, alpine or alpestine, entire- 

 leaved, cespitose from multicipital caudex, no fine or cinereous 

 pubescence, monocephalous : leaves few on the simple stem at least 

 the radical broader than linear : rays rather numerous and not very 

 narrow : pappus simple or nearly so. 



M. Involucre hirsute or pubescent, greenish : herbage not strigulose 

 nor cinereous. 



E. radicatns Hook. Fl. ii, 17. "A span high or less, densely tufted: 

 leavei all spatttlate-linear or somewhat wider (broadest only a line or two 

 wide), hirsute or hirsutely ciliate, or sometimes almost naked, then 

 glabrous ; tio glandular roughness : involucre more or less villous-pubes- 

 cent (barely 3 lines high) : rays white or purplish, 2 or 3 lines long." Al- 



