H. G. SIMMONS. [sec. arct. exp. fram 



Fan. Fl., p. 130), which he then called D. leptopetala. But afterwards, 

 he puts this among the synonyms of D- oblongata together with 6 

 other names, that he quotes after Trautvetter, Consp. Fl. Nov. Semi. 

 In my opinion, Gelert is quite right in reducing it to a variety of D. 

 alpina, distinguished by a strong and dense hair-covering but not sharply 

 defined from the main form. 



Var. glsLcialis, (Adams) Kjellm. 



D. glacialis, Adams, Descr. plant, min. cogn.; Tbautvetter, Consp. Fl. Nov. Semi.; 

 Gelert, 1. c, ex p. ; non Hooker, Fl. Bor. Amer. ; D. alpina var. glacialis, 

 KjELLMAN, in Vegaexp. 



Already Trautvetter (1. c, p. 54) and Th. M. Fries (Till. Spetsb. 

 Fan. Fl.) have held out that the D. glacialis of Adams cannot be up- 

 held as a species separate from D. alpina, without however reducing 

 it to a variety, as Kjellman (Sib. Nordk. Fan. Fl., p. 266) has done, 

 whereas Gelert again thinks that it may be distinguished as a species. 

 To this he comes, however, by examination of specimens from America, 

 determined by Hooker, and forming his material for the description in 

 Fl. Bor. Amer. I, p. 51. Those indeed belong, as Gelert rightly ob- 

 serves, to a species of the section Aizopsis; I have myself seen arctic 

 as well as Rocky Mountain specimens of this plant, which is, however, 

 quite different from the asiatic one of Adams. The D. glacialis of 

 Gelert consequently comprises two different plants of which I do not 

 hesitate to place one, viz. Ihe original D. glacialis of Adams as a variety 

 of D. alpina, notwithstanding that I have seen no original specimens 

 of it, the more so as Trautvetter, who has probably known the 

 original plant, has referred it to D. alpina, and this author has not 

 otherwise been apt to give a too wide range to his species. Specimens 

 from Taimyr (leg. Middendorf?) referred by Gelert to D. glacialis, 

 from Cape Chelyuskin (leg. Kjellman) and from Melville Island (leg. 

 Trevelyan) in the Copenhagen herbarium, as also several specimens in 

 the Nat. Hist. Mus., doubtless represent a variety of D. alpina, which 

 has narrow, sometimes even linear, leaves with a very prominent middle 

 vein, which is continued up to the point of the leaf. The covering 

 mostly consists of starry hairs, and the scape and especially the 

 pods, are in general rather glabrous (cf. also Ostenfeld, Flow. pi. Cape 

 York, p. 67). This variety, however, is not easily distinguished from 

 the type of the species. 



