328 Rvdberg : Rocky Mountain flora 



Gymnolomia ciliata (Robins. & Greenm.) Rydb. sp. nov. 

 Gymnolomia hispida, var. ciliata Robins. & Greenm. Proc. 

 Boston Soc. Nat. Hist. 29: 93. 1899. 



Helianthus 



The authors of the New Manual have reduced Helianthus aridus 

 Rydb. to a synonym of H. petiolaris. Although the forms of its 

 leaves resemble those of that species, H. aridus is much more 

 closely related to H. lenticularis (H. annuus of the Manual), 

 which is indicated by the form of the bracts and the pubescence. 

 If it should be reduced at all, it should be made a variety of H. 

 lenticularis. It may even be a depauperate form of that species. 



Helianthus giganteus is omitted, although unquestionable speci- 

 mens have been collected in Colorado. (See my Flora of Colorado, 

 page 372.) 



Helianthella 



In the New Manual Helianthella uniflora is described in the key 

 as having a purple disk. In all specimens I have seen the disk- 

 corollas are yellow. H. Douglasii is not included in the flora, 

 although it has been collected in Montana by F. W. Anderson and 

 Tweedy, in the Yellowstone Park by Tweedy, and south thereof 

 in Wyoming by C. C. Curtis. (See also my Flora of Montana 

 and the Yellowstone National Park.) 



Enceliopsis 

 Enceliopsis nutans (Eastwood) A. Nels., from Colorado and 

 Eastern Utah, is omitted in the New Manual. This is strange, 

 as Professor A. Nelson is the author of the name Enceliopsis as 

 well as of the combination E. nutans. 



Bidens 

 Bidens bipinnata L. is included in Coulter & Nelson's New 

 Manual. I have not seen any specimens from the Rocky Moun- 

 tain region that could be referred to that species. B. Bigelovii is, 

 however, found in Colorado. Crandall 2726, Shear 4587, Cle- 

 ments 64 and 82, all resemble so closely the Mexican Boundary 

 Survey no. 582 and no. 582a, from which B. Bigelovii was de- 

 scribed, that there is no doubt about the identity. Duplicates of 



