146 COMPOSITE. (COMPOSITE FAMILY.) 



Var. foliosa, Eaton. Canescent with appressed sericeous pubescence, 

 mostly soft and destitute of hispid bristles; but stem often hirsute or villous: 

 leaves short, oblong or elliptical : heads small, rather numerous and clustered. 

 Bot. King Exp. 164. Mountains of Wyoming to Utah and Arizona. 



Var Rutteri, Rothrock. Most like the preceding, equally sericeous- 

 canescent with usually longer soft hairs : heads of double the size, fully 

 ^ inch high and wide, solitary or few in a cluster, foliose-bracteate : rays 30 

 to 40, inch long.. Wheeler Rep. vi. 142. S. Arizona ; also Colorado, where 

 the leaves are slightly cauescent. 



9. APLOPAPPUS, Cass. 



A large and polymorphous genus ; mostly herbaceous, some suffruticose : 

 the flowers all yellow, and occasionally rayless, thus making them undistin- 

 guishable from the following genus. 

 * Involucre ofjirm well-imbricated or rigid bracts: rays numerous, several, or 



wanting: pappus commonly fuscous or rufous, and more or less rigid. 

 Heads rayless: akenes senccous-canescent : leaves coriaceous, dentate. 



1 . A. Nllttallii, Torr. & Gray. Herbaceous from a woody stock, a span 

 to a foot high : leaves from spatulate-oblong to almost lanceolate : heads few 

 terminating the branches, one third inch high : involucre hemispherical ; the 

 bracts with slightly spreading greenish tips. From New Mexico and 

 Arizona to Idaho and the Saskatchewan. 



< -t- Heads conspicuously radiate, large and showy: rays very numerous, % to 



1 inch long: akenes wholly glabrous: leaves coriaceous, entire. 

 - Stems equably and very leafy up to the sessile or subsessile heads. 



2. A. Fremonti, Gray. A foot or less high, simple or fastigiately 

 branched above : leaves lanceolate, 2 to 4 inches long, obscurely 3 to 5-nerved ; 

 lower narrowed and upper partly clasping at base: involucre (inch or less 

 high) broadly campanulate ; its bracts broadly lanceolate, conspicuously and 

 often cuspidately acuminate : rays inch long : akenes obovate, strtate-nerved, 

 almost as long as the rigid pappus. Proc. Acad. Philad. 1863, 65. Colorado. 



Var. "Wardi, Gray. Dwarf, fascicled stems only a span high: leaves 

 proportionally small, linear-lanceolate, destitute of lateral nerves : heads 

 one-half smaller, 2 or 3 in a terminal glomerule : akenes double the length 

 of the scanty pappus. Synopt. Fl. i. 128. Wyoming, L. F. Ward. 

 -H. +-. Stems simple, above with decreasing or sparse leaves and solitary or few 



naked and usually pedunculate heads, at base a tnft of ample lanceolate- or 



spatulate-oblong radical leaves. 



3. A. croceus, Gray. Stem stout and erect, commonly a foot or two 

 high, and with radical /eaves afoot or less long (including the petiole) : cauliue 

 leaves ovate-oblong to lanceolate, partly clasping : head mostly solitary : invo- 

 lucre a full inch in diameter ; its bracts orate, to spatulate-oblong, very obtuse, lax, 

 inner with scarious erose-denticulate margins : rays saffron-yellow, sometimes 

 inch long : akenes narrowly oblong, nearly the length of the pappus. Proc. 

 Acad. Philad. 1863, 65. Mountains of Colorado. 



4. A. integrifollUS, T. C. Porter. Stems several from the caudex, 

 ascending, a foot or less high : radical leaves 3 to 8 inches (including short 



