CATALOGUE. 1(51 
Aplopappus unifloeus, T. & G-. Loosely webby-piibescent, or at 
length smooth ; stems several, 12-18' high, ascending from a fusiform cauclex; 
radical leaves broadly-lanceolate, 4-6' long, 6-15" wide, tapering both ways, 
on moderately long petioles, coarsely and sharply serrate ; cauline ones 
gradually smaller, oblong-hnear, serrate or entire ; heads large, sohtary or 
2-5 on very long nearly or quite naked peduncles ; involucre flattened hemi- 
spherical, 9-12" broad, the nearly equal oblong-hnear scales in one or some- 
what in two rows, shghtly hairy ; rr.ys deep-ychow, 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 Eocky Mountains, (Drummond.") Near 
the tunnels of Echo Caiion, and near Evanston, on the Bear Eiver, Utah ; 
6-7,000 feet elevation; July. The plant described by Hooker, under the 
name of Donia uni/lora, was of lower stature, and had usually but one head, 
and that with fewer and rather longer rays. (577.) 
Aplopappus acaulis. Gray. Froc. 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 I'long; 
upper ones none, or few and very small; heads single, 12-14" broad ; involucre 
hemispherical, nearly glabrous, of fcvv^ broadly ovate, acute, chartaceous, 
scarious-margined, imbricated scales; rays IC- 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.) 
Yar. GLABRATUS. {Stenotus ccuspitosus, 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 alxjve Cottonwood 
Lake in the Wahsatch ; 7,500-9,500 feet altitude; July-September. (579.) 
Aplopappus apargioides, Gray. Proc. Amer. Acad., 7. 354. Low, 
caespitose, smooth or sparingly villose-ciliate ; stems numerous, 3-7' high, 
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