COMPOSITE. (COMPOSITE FAMILY.) 157 



(- -H- Depressed-stemless and monocephalous. 



4. T. COndensata, Parry. Very lanuginous with long and soft arach- 

 noid hairs, the spatulate-obovate leaves rosulate-crowded around the large and 

 broad sessile head, the whole forming a globular or hemispherical woolly tuft, 

 an inch and a half high and surmounting a slender stoloniform caudex : bracts 

 of the involucre linear and soft, with a weak attenuate apex, all nearly equal 

 in length : rays 100 or more, narrow: pappus of ray and disk plurisetose and 

 long. Am. Nat. viii. 213. Wyoming, on a high alpine peak of the Owl 

 Creek range, J. D. Putnam. 



* * Bracts of the involucre not prominently if at all acuminate : heads mostly 

 smaller or narrower : pappus of the disk and often of the ray plurisetose. 



H- Hairs on the akene mostly copious and slender, simple or bifid, the lobes ascend- 

 ing or merely spreading : heads middle-sized, more or less naked-pedunculate : 

 the pink or rarely white rays and the involucre each from J to \ inch long. 



5. T. florifer, Gray. A span or more high, cinereous-hirsute : stems 

 rather slender, leafy : leaves linear or the lowest lanceolate-spatulate, acute, 

 mostly apiculate-acuminate : involucral bracts linear-lanceolate, little unequal. 

 Proc. Am. Acad. xvi. 84. Montana to Washington Territory and Oregon. 



< Hairs on the akene mostly glochidiate-capitellate. 



-*. Head large, f to 1 inch long without the rays : plants green and glabrous, 

 depressed-acaulescent : leaves large, much surpassing the head. 



6. T. Wilcoxiana, Wood. Leaves linear-spatulate, elongated, 1 to 3 

 inches long including the petiole-like base : head mostly solitary, short-pedun- 

 cled or subsessile : bracts of the involucre lanceolate or linear, barely acutish : 

 ray and disk pappus of similar slender and elongated bristles. Bull. Torr. Club, 

 vi. 163; Bot. Gazette. Hi. 50. Colorado to Arizona and Indian Territory. 



7. T. Rothrockii, Gray. Leaves more broadli/ spatulate and shorter, 

 an inch long or less, rosulatc around the solitary head which is closely sessile at 

 the surface of the ground, or at length with one or two additional heads : invo- 

 lucre shorter and broader ; its bracts oblong, mostly obtuse : ray-pappus of 

 chaffy bristles not longer than the breadth of the akene. Wheeler Rep. vi. 148. 

 In the alpine regions of the mountains of South Park, Colorado. 



*+ -M. Heads from $to f inch long, sessile or rarely on a very short naked peduncle : 

 plants sericeous-pubescent, depressed-acaulescent or -caulescent : ray-pappus 

 mostly plurisetose. 



8. T. Sericea, Hook. Depressed-acaulescent, with closely sessile solitary 

 or few heads on the crown next the ground, surrounded and more or less sur- 

 passed by the linear or linear-spatulate leaves, an inch or two high : heads an 

 inch or less long: involucral bracts narrowly lanceolate, acute: rays white 

 or purplish : ray and disk of pappus mostly similar. From New Mexico 

 and Arizona northward in the mountains to British America. Exceedingly 

 variable. 



Var. leptotes, Gray, has heads less than -J- inch long, all but the primary 

 ones distinctly pedunculate, and the leaves narrowly linear with attenuate 

 base. Middle Park, Colorado, Parry. 



9. T. incana, Nutt. Depressed-caulescent or subcaulescent, an inch to 

 a span high, branching : leaves from narrowly spatulate to almost linear ; 



