CATALOGUE. ' 161 



Aplopappus uniflorus, T. & Gr. Loosely webby-pubescent, or at 

 length smooth ; stems several, 12-18' high, ascending from a fusiform caudex; 

 radical leaves broadly-lanceolate, 4-6' long, 6-15" vs^ide, tapering both ways, 

 on moderately long petioles, coarsely and sharply serrate ; cauline ones 

 gradually smaller, oblong-linear, serrate or entire ; heads large, solitary or 

 2-5 on very long nearly or quite naked peduncles ; involucre flattened hemi- 

 spherical, 9-12" broad, the nearly equal oblong-linear scales in one or some- 

 what in two rows, shghtly hairy ; rays deep-yellow, about 50 ; disk-flowers 

 numerous ; the style with oblong-lanceolate branches, the hispid and the 

 stigmatic parts nearly equal; achenium silky-villous ; pappus whitish, of 

 rather few, somewhat unequal, scabrous, capillary bristles. — " Plains of the 

 Saskatchewan and prairies of the Rocky Mountains, (Drummond.") Near 

 the tuimels of Echo Canon, and near Evanston, on the Bear Eiver, Utah ; 

 6-7,000 feet elevation ; July. The plant described by Hooker, under the 

 name of Donia uniflora, was of lower stature, and had usually but one head, 

 and that with fewer and rather longer rays. (577.) 



Aplopappus acaulis. Gray. Proc. Amer. Acad., 7. 353. {Stenotus 

 acaulis, Nutt.) Low, csespitose ; stems leafy at the base, 2-6' high, clustered 

 at the summit of a woody caudex ; leaves minutely scabrous-pubescent ; the 

 lower ones oblanceolate, mucronate-acute, somewhat 8-nerved, about 1' long ; 

 upper ones none, or few and very small; heads single, 12-14" broad ; involucre 

 hemispherical, nearly glabrous, of few broadly ovate, acute, chartaceous, 

 scarioiis-margined, imbricated scales; rays 10-12, very broad ; style of the 

 disk-flowers with linear-lanceolate hispid appendages, nearly twice longer 

 but narrower than the stigmatic portion ; pappus copious, whitish, of unequal 

 densely scabrous somewhat rigid bristles.— Southern Idaho ; Mount Davidson, 

 Nevada, (Bloomer !) Mountain ranges of Nevada from the Trinity to the 

 East Humboldt Mountains ; 6-8,000 feet altitude; May- July. (578.) 



Var. GLABRATUS. {Sitenotus ccespitosus, Nutt. !) Smooth ; the scapes 

 more leafy, sometimes branching and bearing 2-3 heads ; not otherwise 

 differing from the type. — Idaho or Wyoming, (^Wyeth ;) Valley of Grreat Salt 

 Lake, (Stansbury.) East Humboldt Mountains, and above Cottonwood 

 Lake in the Wahsatch ; 7,500-9,500 feet altitude; July-September. (579.) 



Aplopappus apargioides. Gray. Proc. Amer. Acad., 7. 354. Low, 

 csespitose, smooth or sparingly villose-ciliate ; stems numerous, 3-7' high, 

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