MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 449 



Montana : Yogo, 1888, R. S. Williams, yo^ (more glabrate than 

 the type) ; Long Baldy, Little Belt Mts., 1896, Flodman, 880. 



* Carduus T weedy i. 



Stout, 3-5 dm. high, in age glabrous, except the arachnoid-vil- 

 lous involucre ; leaves linear, not decurrent, glaucous, pinnatifid 

 with rounded ovate lobes ending in short yellow spines ; heads about 

 3 cm. high and 2.5 cno. in diameter, leafy-bracteate ; bracts imbri- 

 cated, lanceolate, endingTn^ yellowish spine, 5-8 mm. long, the outer 

 arachnoid-villous, especially on the margin, the inner puberulent ; 

 corollas rose-color; pappus tawny, plumose. 



Nearest related to C. Hookeriamis and C. scopulortmi. From the 

 former it differs in the glaucous leaves, which are not at all tomen- 

 tose beneath, and from the latter in the more nearly round and less 

 spiny lobes, the lack of the decurrent ridges or wings on the stem, 

 and the smaller heads. It grows at an altitude of 2700-3000 m. 



Montana: Park Co., 1887, Tweedy, jjo (type); Torn Miner 

 Creek, 1886, 7/27 (?). 



Yellowstone Park: Soda Butte Creek, 1885, Tiveedy, y^g. 



* Carduus Kelseyi. 



Stem tall and stout, 0.5-2 m. high, striate, more or less cobweb- 

 hairy, very leafy ; leaves linear, sinuately toothed and ciliate with 

 rather weak spines, green above, more or less cottony beneath, or in 

 age almost glabrate ; heads several, in a leafy spike, 3-4 cm. high, 

 subtended by linear-subulate bristly-ciliate and cobwebby leaves ; 

 bracts moderately unequal, lanceolate, without a glandular ridge, a 

 few of the outermost with a weak spine, the rest unarmed but with a 

 long slender tip ; corolla cream-color : pappus plumose. 



Somewhat intermediate between C. scofidortim and C. Hook- 

 eriamis, having the cottony pubescence of the lower leaf surfaces 

 of the latter, but the large heads and general habit of the former. 

 It differs from both in the undivided leaves. 



Montana: Main range of the Rockies, not far from Helena, 

 1891 and 1892, F. D. Kelsey 



Carduus scopulorum Greene, Proc. Acad. Sci. Phila. 1892 : 362 ; Cir- 

 sium eriocefhalum Gray, Proc. Acad. Sci. Phila. 1863: 69; not 

 Wallr. ; Cnicus eriocepkalus Gray, Proc. Am. Acad. 10 : 46 [Syn. 

 Fl. i^: 399]. 



On mountain-sides, at an altitude of 2000-2500 m. 

 Montana: Park Co., 1887, Tzveedy, 34g; Indian Creek, July 



21, 1897, Rydberg & Bessey^ 5216. 



