RYDBERG: Rocky MOUNTAIN FLORA 538 
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. Parryt 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: Cafion Largo, 1859, ezwéerry (Macomb’s Ex- 
pedition ; type in herb. Columbia University). 
CotorApo: Mesa Verde, 1892, Lastwood. 
v Sideranthus annuus nom. nov. 
Aplopappus rubiginosus A. Gray, Syn. Fl. 17: 130. 1884. 
Not Torr. & Gray, Fl. 2: 240. 1842. 
A little comparison between the descriptions of A. radbiginosus 
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. phyllocephalus DC., but perhaps distinct. 
~ Aster griseolus sp. nov. 
Perennial with a horizontal rootstock; stem 1-1.5 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 
