Rydberg : Rocky Mountain flora 653 



the upper smaller ; involucres turbinate ; bracts in about 5 vertical 

 rows, usually 3 in each row, narrowly lanceolate, attenuate into a 

 long slender subulate spreading tip, carinate, slightly tomentulose 

 and webby ; achenes narrow, tapering downwards, strigose-pubes- 

 cent ; corolla narrowly tubular-funnelform ; lobes erect, lanceolate. 



This species is closely related to C. Parryi and C. Howardi, 

 but the former differs in the broad, 3-nerved leaves and broader 

 bracts, and the latter by its spreading arcuate leaves, broader bracts, 

 depressed habit and elongated upper leaves, which usually equal 

 or exceed the heads. C. Newberryi grows on dry hills. 



New Mexico: Canon Largo, 1859, Nci^bcrry (Macomb's Ex- 

 pedition ; type in herb. Columbia University). 



Colorado: Mesa Verde, 1892, Eastivood. 



Sideranthus annuus nom. nov. 



Aplopappus rubiginosus A. Gray, Syn. Fl. 1- : 130. 1884. 

 Not Torr. & Gray, Fl. 2 : 240. 1 842. 



A little comparison between the descriptions of A. rubiginosus 

 in Torrey and Gray's Flora and in Gray's Synoptical Flora will 

 show that they are drawn from different plants. The first line in 

 Torrey and Gray's description, viz. " suffruticose ? branching from 

 the base, viscidly pubescent and cinereous" and further down 

 " scales of the involucre ... in about 2 series, nearly equal, 

 loose, at length spreading " do not at all fit the plant of the upper 

 Platte, for that plant is strictly annual, simple at the base and 

 branched above, viscid but can hardly be called cinereous ; the 

 bracts are in 4 or 5 series, well imbricated and the outer much 

 shorter. The type of Aplopappus rubiginosus was collected by 

 Drummond, and a specimen is in the Gray herbarium. This is 

 very unlike the plant of the upper Platte region, which is de- 

 scribed in Gray's Synoptical Flora, but agrees fully with the 

 description of Torrey and Gray. It is more closely related to 

 A. pliylloctphalus DC, but perhaps distinct. 



Aster griseolus sp. nov. 



Perennial with a horizontal rootstock ; stem I — 1 . 5 dm. high, 

 hirsute with ascending hairs, rather simple ; leaves linear, 3-5 cm. 

 long, sparingly hairy on both sides, sessile, acute, entire ; heads 

 about 1 cm. high, 1-4 in a small corymb ; bracts oblanceolate or 



