CATALOGUE. 143 
terminated by a rather large head; leaves oblong to linear-lanceolate, acute, 
sessile, coriaceous; scales of the involucre oblong, mucronate, in several 
series (inner ones much the longest), more or less ciliate; ray-flowers vari- 
able in length, but in my specimens one-third longer than the tawny 
pappus of the disk—Loew, near Pueblo, Colo. (15). 
Aptopappus Parry, Gray.—Twin Lakes, Colorado (471). 
Aptoppapus Nurrauui, T. & G.—6’ high, from a woody base, more or 
less densely covered with a close, rather ashy pubescence; leaves obovate 
or lanceolate cuneate, thickish, serrate, the teeth tipped with long bristles; 
head smallish (3” in diameter); rays none; disk-flowers 20-25, hardly as 
long as the fulvous pappus; scales of the involucre in about three series, 
thickish, rather obtuse, and with scarious margins.—Loew, Arizona (17 a). 
APLOPAPPUS GRACILIS, Gray.—10-18’ high; many wiry stems from the 
same root, sparsely covered throughout with long and delicate white hairs; 
small lower leaves pinnatifid, lobes rounded; upper leaves entire, narrowly 
linear, 3-6’ long; heads 3-5” in diameter; scales of the involucre in several 
series, acute and somewhat mucronate or hairy tipped, half as long as the 
rays; receptacle deeply fimbrillate; bristles of the pappus distinctly un- 
equal.—Sanoita Valley and Camp Apache, Southern Arizona ties ; and 
var. denudatus, Torr., also from Arizona. 
ApLopappus sPInuLosus, DC.—Much branched, from a woody base, 
softly puberulent or canescent; leaves pinnately parted, 6-18” long, rather 
rigid; lobes again often variously divided, and tipped with a delicate bristle; 
involucre 4—6” in diameter; scales in about four series, lanceolate, slightly 
mucronate or bristle-pointed; tawny pappus of the disk about equal to the 
flowers ; rays 6-9" long. —San Luis Valley, Colorado (470); and Santa 
Fé, N. Mex. (24). 
ApLopappus Lancgouatus, T. & G.—San Luis Valley, Colorado (474, 
485). This form is insome features intermediate between A. Vaseyi and A. 
tenuicaulis, D. C. Eaton, and probably likely, according to Prof. Asa Gray, 
to destroy the latter species. See Watson’s Botany of the 40th Parallel, 
p- 160. 
ApLopappus 1nuLOoIDES, T. & G.—Low, and much branched, from a 
short stem, tomentose throughout or sometimes nearly glabrous; lower 
