Rydberg : Rocky Mountain flora 651 



thin, glabrous on both sides ; inflorescence paniculate ; branches 

 arching and secund ; heads numerous, 3-4 mm. high ; bracts 

 linear or linear-lanceolate, acute; rays i — 1.5 mm. long, less than 

 0.5 mm. wide; achenes hirsutulous. 



This is closest related to S. canadensis, but differs in the gla- 

 brous leaves and the less pubescent stem. It may also be con- 

 fused with 5. serotina and S. eio)igata, but the former has much 

 larger heads, fully 5 mm. high, and in the latter the inflorescence 

 is narrower, rhombic in outline and with ascending scarcely arched 

 branches. 



Colorado : Yampa, 1898, Shear & Bcssey 52^^ (type). 



Wyo.ming : Copperton, 1901, Tivecdy ^ooj. 



Solidago polyphylla sp. nov. 



Tall, sometimes a meter high ; stem strict, simple and puber- 

 ulent up to the more hirsutulous inflorescence ; leaves narrowly 

 lanceolate, sessile, acute at the base, acuminate at the apex, dis- 

 tinctly triple-nerved, serrate above the middle with small distant 

 teeth, thick and firm, green, scabrous above, more softly short- 

 pubescent beneath ; inflorescence panicled ; branches more or less 

 arching and secund ; heads about 5 mm. high ; bracts linear, acute ; 

 rays 1.5—2 mm. long, 0.5 mm. wide; achenes hispidulous. 



This species is closely related to 5". proccra and has been mis- 

 taken for it. It differs from that species in the larger heads (in 

 S. proccra only 3-4 mm, high), the more compact inflorescence, 

 the more toothed upper leaves and the shorter pubescence on the 

 stem and lower leaf-surfaces. 



Colorado : Cafion City, 1896, Clements 2gj (type) ; Gunnison, 

 1 90 1, Baker 8 ^g ; Engelmann Cafion, 1901, Clements ^00. 



New Mexico : Roswell, igoo, Earle j^6. 



Solidago viscidula sp. nov. 



Low, about 2 dm. high ; stem finely pubescent, reddish ; basal 

 leaves and lower stem-leaves narrowly linear-oblanceolate, finely 

 puberulent and somewhat viscid, denticulate, obtuse or acutish, 

 indistinctly triple-veined ; upper stem-leaves sessile ; inflorescence 

 paniculate but flat-topped, branches scarcely secund ; heads 

 numerous, small, about 5 mm. high ; bracts linear, obtusish, viscid ; 

 rays pale, about 2 mm. long and 0.5 mm. wide. 



This is closely related to 5. inissonriensis, but is distinguished 

 by the viscid inflorescence and the indistinctly triple-nerv^ed leaves. 



Colorado: Grand Lake, 1888, flolicav. 



