316 Rydberg : Rocky Mountain flora 



closely related to that species, the second can scarcely be said to 

 be so. Its habit, foliage, and pubescence are those of E. subtrinervis 

 and only the involucral bracts are those of E. macranthus. 



Erigeron incanescens Rydb., E. eximius Greene, and E. viscidus 

 Rydb. are all made synonyms of E. formosissimus Greene. The 

 first has a hirsute involucre and is related to E. subtrinervis; the 

 third and fourth have glandular-puberulent involucre and may well 

 be united. The authors have included Erigeron formosissimus also 

 among the annuals or biennials, though it is evidently a perennial. 

 The third has also glandular involucres, but is almost glabrous and 

 should have been included in E. asper of the New Manual if 

 reduced. 



Erigeron glabellus Nutt., E. consobrinus Greene, E. oblance- 

 olatus Rydb., and E. Earlei Rydb. are made synonyms of E. 

 asper Nutt. E. glabellus and E. Earlei have perennial branched 

 rootstock; the rest are biennial with tap-roots. They may per- 

 haps sometimes be perennial, but there is no evidence of a branched 

 rootstock. In E. glabellus the pubescence is spreading, in E. 

 Earlei closely appressed. 



Erigeron nematophylliis Rybd. is made a synonym of E. 

 Eatonii A. Gray. The latter is not uncommon in Utah, where 

 I have collected it myself. A duplicate of the type is in the 

 Columbia University herbarium. It has narrowly linear-oblan- 

 ceolate, distinctly triple-nerved basal leaves and decidedly 

 flattened achenes. In E. nematophylliis the leaves are almost 

 filiform and strictly one-nerved. Evidently Professor Nelson 

 did not know E. Eatonii, for what he has distributed under 

 that name is E. nematophylliis. The only specimens of the 

 real E. Eatonii from Wyoming in our collections are from Wind 

 River Mountains, and there collected by Merrill & Wilcox and 

 by Tweedy. 



Erigeron curvifolius Piper is made a synonym of E. luteus A. 

 Nels., although they are not closely related, the former being a 

 coarsely hirsute plant, with leafy stem, the latter being a closely 

 strigose subacaulescent plant. It would have been much better 

 to reduce Nelson's own E. luteus to a synonym of E. pencephyllus 

 A. Gray, to which it is closely related. 



Erigeron Parryi Canby & Rose, E. Scribneri Canby, and E. 



