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). 



Aplopappus Paeeyi, Gray. — Twin Lakes, Colorado (471). 



Aploppapus Nuttallii, 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 (596) ; 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 

 Fd, N. Mex. (24). 



Aplopappus lanceolatus, T. & G. — San Luis Valley, Colorado (474, 

 485). This form is in some 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 inuloides, T. & G. — Low, and much branched, from a 

 short stem, tomentose throughout or sometimes nearly glabrous; lower 



