CATALOGUE. 195 



heads large, "glomerate in the axils of the uppermost leaves," or peduncled ; 

 involucral scales linear-lanceolate, appressed, spine-tipped, arachnoid-tomen- 

 tose ; rays purplish. — This is not nearly so white a plant as C. undulatum ; 

 the leaves are much narrower and more prickly, and the involucre more arach- 

 noid. The present specimens have naked long-peduncled heads, and in this 

 respect differ from the type as originally characterized. Mountains of British 

 Columbia to Oregon and Idaho. Colorado, (Parry 34, Hall & Harbour 340, 

 and 341, white-flowered.) From the West to the East Humboldt Mountains, 

 Nevada; 5,500-7,000 feet elevation; June, July. (688.) 



CiESiUM CouLTEEi, Harvey & Gray. Fl.Fendl. 110. " Webby-tomen- 

 tose ; stem branching ; stem-leaves oblong-lanceolate, partly clasping, loosely 

 webby above, the edges wavy or sinuate ; -heads very large, solitary, not 

 bracted at the base ; involucre exceedingly arachnoid-woolly, the scales loosely 

 imbricated, straight, at length spreading, all of them oblong or lanceolate from 

 a short base, gradually narrowed into a long cuspidate needle-like point. — 

 Heads nearly 2' broad ; flowers deep crimson ; leaves much like those of C. 

 undulatum, but not so deeply lobed. California, (Coulter, Brewer ! Bridges, 

 268 !) Carson City, Nevada, (Anderson !) 



CiESiuM Deummondii, T. & Gr. Stemless, or with simple stems 1-2° 

 high, glabrous or very sparingly and deciduously webby ; leaves green and 

 smooth above, paler and sometimes slightly webby beneath ; radical ones 

 oblanceolate or spatulate, the primary ones entire with ciliate-spinulose mar- 

 gins, later ones and the stem-leaves pinnately toothed or incised, often doubly 

 so, and spiny with weak slender prickles ; heads 1-4, sessile or short-stalked, 

 surrounded either by the radical leaves or by a circle of leaves at the top of 

 the stem ; involucres glabrous, the scales triangular-lanceolate, appressed, 

 tipped with weak prickles ; flowers "red" or purplish. — There are two forms, 

 differing only in the presence or lack of a stem, and even in this respect they 

 pass into each other, (a.) The caulescent form. Saskatchewan and Rocky 

 Mountains of British America ; Colorado, (Hall & Harbour, 343.) Hum- 

 boldt Valley, meadows in the Toyabe Mountains, and in Bear River Canon ; 

 5-8,000 feet elevation. (689.) (&.) The acaulescent form ; {C.acaule,Ywc. 

 A7nericanum, Gray. Proc. Acad. Phil, March, 1863, p. 68.) Colorado 

 (Hall & Harbour, 339 ! Vasey, 349 !) to California (Brewer !) and Oregon 

 (Kronkhite !) Carson City, Nevada, (Anderson, 91 !) Ruby and Thousand 



