Toicnsendia. COMPOSITE. 169 



large-headed, comparatively broad-leaved, and glabrate forms (wliich may almost pass into 

 the two jireeccling species), to a narrowly leaved and more serieeuus form with head barely 

 two-thirds ineh long, as in the original northern sjieiimens (both grow together in Colorado, 

 "the latter flowering two weeks later"), or sometimes even yet more reduced, su that the 

 heads are barely half-inch long. 



Var. leptotes, Gray, is an ambiguous form from Middle Park, Colorado (Parry), 



t with heads less thau half-inch long, and all but the primary ones somewhat diirtinctly pedun- 

 culate: leaves narrowly linear with attenuate liase. Perhaps a distinct s|iecies. 



T. Arizonica, Gray. Deju-essed subcaulesLcnt and multicipital, or branching from a per- 

 ennial root, forming a lax jmlvinate tuft of i or 3 inches high, minutely sericeous-canescent : 

 leaves spatulate. sliort (about half-inch long), seldom surpassing the Ijarely sessilr and mostly 



» foliose-fulcrate hemispherical heads (these merely half-inch high) : bracts of the involucre 

 lanceolate, mostly obtuse : pappu< of ray and disk alike and of equal length, rather rigid, about 

 the length of the akeue (2 or 3 lines long). — Proe. Am. Acad. xvi. 85. — Arizona, adjacent 

 Utah (Pidiiier), and X. W. New Mexico, Coues & Puhiur, M. E. Jiuks, ilatthews. 



T. incana, Xutt. Depressed-caulescent or subcaulescent from a winter annual or perennial 

 root, an inch to a span high, branching, strigulose-ciuereous or canescent : leaves from nar- 

 rowly spatulate to almost linear; uppermost fulcrate around the sessile (about half-inch) 

 heads and seldom surpassing them; involucral bracts more sericeous and ciliate and less 

 obtuse than in the foregoing : pappus of the ray from a third to half the length of tliat of 

 the disk. — Trans. Am. Phil. Soc 1. 1. T. Fremontii, Torr. & Gray, in Jour. Bost. Xat. Hist. 

 Soc. ». 108, where the heads are wrongly said to be larger thau tho-e of T. sericea. — 

 Mountains of Wyoming to S. Utah and the borders of S. Xe\ada; first coD. by Xuttali. 

 +-r 4-i- ■!-;■ Heads about one-third inch Ions;, sessile among the rosulate leaves: herbage soft- 

 laiiate: pappus deciduous in a ring! — § Crcphurus, Nutt. 



T. spathlllata, Xutt. Depressed and multicipital from a slender perennial root, forming 

 a tuft an inch or so high : leaves crowded, spatulate, densely villous-lanate ; the upper about 

 equalling the heads : bracts of the involucre oblong-lanceolate, acute : rays rather short, 



• pinkish: papjjus of ray and disk similar and of the same length, of >lender bristles.— 

 Trans. Am. Phil. Soi. 1. c. — Eocky ^Mountains in Wyoming; on the Black Hiils of the 

 Platte, Xiittall, and Wind-River Mountains, Parry. 



.j-^ ++ -H- -H- Heads small, only a quarter-inch high (exclii-^ive of the rays), mostly short-pedun- 

 culate, hemispherical: involucre of few-ranked broadly lanceolate and bari-ly acute bracts: 

 caulescent and branching (at least in age) and summer-flowering; pappus of the (sometimes 

 infertile but feminine) ray shorter, commonly setose-'quamellate. 

 = Green and glabrate, perennial. 

 " T. glabella, Gray. An inch or two high from a slender rootstock, nearly simple, sparsely 

 pilose-jiuliescent when young : leaves thickish, soon glabrous, spatulate (an inch or less long, 

 including tlie usually slender petiole) ; the uppermost usually surj.a-sed by the slender and 

 naked (sometimes inch-long) peduncle: involucre glabrous : pappus of the ray in one sjjeci- 



* men plurisetose and nearly'^half the length of that of the disk, in another reduced to short 



squamellffi. — Proc. Am. Acad. x^i. S6.— Pagosa, S. W. Colorado, yewberry. 



= = Cinereous with fine and ch.se somewhat .strigulose pubescence, flowering from near the 



ground at first, but becoming taller (4 to 10 inches liigU) and loosely branching'; pappus of ray- 



akenes alwavs reduced to a crown of short squamelhe, wuh rarely one or two short bristles. 



(Species hardly distinct.) — § Xanodia, Xutt. 



T. Fendleri, Gray. Boot slender, but apparently perennial ■ leaves linear: liract- of the 

 involucre unequal, in about 3 ranks, acute. — PI. Fendl 70. & Proc. Am. Arad. 1. c — 



' Gravellr bills , Xew Mexico and S. Colorado, fl. May to Sept. ; first coll. by Fendler. 



T. Strig6sa, Xutt. Winter annual, with slender root, flowering when only half-inch high, 

 often attaining a span in height : early leaves spatulate ; later ones linear : head? rather 



« smaller; bracts of the involucre broader, acutish, in about 2 ranks, the outer fliorter. — 

 Trans. Am. Phil. Soc. 1. c. ; Gray, PI. Fendl. 1. c. — Gravelly hiUs and plains, Wyoming to 

 Xew ilexico and Arizona ; first coU. by Xuttali. 

 T. MexiC-AXA, Grav, PI. Fendl. 70 (from about SaltiUo. &c., Mexico, Grf,j^. Parry, Palmer, 



and from farther south, Galeotti), differs slightly from the last in ha^^ng the two ranks of 



involucral bracts of equal length and aU very obtuse. 



