ALPINE FLORA OF COLORADO 



871 



nivalis) is circumpolar. Alsine haiealmsis appears to have a 

 singular distribution; north to Montana and Oregon only, and 

 then reappearing in Central Asia. It may be that the identity 

 of the Asiatic and American plants needs confirmation. Alsine 

 lata is supposed to reach Siberia, though Rydberg says nothing 

 of its ranging beyond our continent. 



(7) The Ranunculaceae are well represented (21 species), 

 but are mostly of the Hudsonian Zone rather than the Arctic- 

 Alpine; 1() do not range above 12,000 feet. 



(8) The Crucifera? are represented by Thlaspi (4), Smelow- 

 skia (2), Erysimum (4), and Draba (13). Only Draha aurea 

 appears to be circumpolar. 



(9) The Rosaceae include as many as 9 species of Potentilla. 

 Of the 14 species of this family, only I] fail to go above 12.r)()() feet. 



(10) The Leguminosa' incliulc no circinnpolar lyp^-s, an.l only 

 one reaches British America; 7 out of the !i b<'loii^- to Trifoliuin. 



(11) The Epilobiacea- nuinbrr only ;j; ChamanrrioN a»;/u.s(i- 

 folium (L.) should proi)ably Uv added, as my wife found a ichiced 

 form of it above timber line on the Tnichas IVak-. in Xrw Mexico. 



(12) Of the 8 Umbellifera> none is circinnpolar, and only one 

 appears to reach British America. 



(13) Of the 6 Pyrolacea-, four are circumpolar, and a fifth 

 reaches Japan. The species of Pyrola exhibit a remarkable 

 degree of stability. 



(14) No Ericacea\ in the restricted sense, are in the list, but 

 I believe Kalmia m'lcrophiiUa (Hooker) should be there. 



(15) The (uMitianacea' number 12; while only one is supposed 

 to extend to the Old World, others are very close to Asiatic and 

 European species. A)iihopo<jon chyans was fornierly not se{)arate(l 

 from Anthopo(/()n (h'lifosus iCcufidna drutosa IJottb.). Anuinlla 



.sidered a form of Ama>r//a a>nanlla ^CrniianJ anmrrlU, L.). 

 Chomlrnpln,Ua frnnoufn was referred to (luw,lrnph,iUa fnnnilis 

 (dcutiaua humllis Stev.). Dasijstr phana mmairj.rii wa> tiot 

 separatc(l from l)a.s,isirphnmt jri,iidn iCrutiana jriijiJa llaenke). 



(16) The Polemoniacea^ consist of four species of Phlox, 



