MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 217 



* Comarum palustre L. Sp. PL 502 [Torr. & Gray, Fl. N. Am. i : 



447; Rydb. Mon. 162; 111. Fl. 2: 217]; PotentiUa ^alustris 



Scop. Fl. Carn. Ed. 2, 359 [Bot. Cal. i : 180J. 



A swamp plant with dark green pinnate leaves, the leaflets oblong, 

 purple acuminate petals, a somewhat fleshy receptacle in fruit, and 

 lateral styles. It ascends up to an altitude of 2500 m. 



Montana: Columbia I'alls, 1892, R. S. Williams, 62J. 



Yellowstone Park: Shoshone Lake, Aug. 10, 1897, Rydherg 

 & Bcsscy, 4344. 

 Fragaria bracteata Heller, Bull. Torr. Bot. Club, 25 : 194 [Rydb. Mon. 



175] ; Fragai'ia vesca Hook. Fl. Bor. Am. i : 184, in part [Wats. 



King's Exp. 5: 85 ; Man. R. M. 83 ; Bot. Cal. i : 177] ; not L. 



The European R. vesca is not a native of America and is only spar- 

 ingly introduced in the East. It is replaced in America by two wild 

 species: R. Americana (Porter) Britton, which growls from New- 

 foundland and Virginia to New Mexico, and may be found in the 

 canons of Eastern Montana ; and R. bracteata, occurring from Brit- 

 ish Columbia and California to New Mexico. The former differ 

 from R. vesca in being less hairy and having very thin leaves ; both 

 have the sepals reflexed in fruit. R. bracteata differs from both 

 in the sepals, which are erect or merely spreading in fruit, and in 

 the scape which nearly always bears an elliptic unifoliolate leaf. It 

 is not uncommon in the mountain region, at an altitude of 1000- 

 2000 m. 



Montana: Jack Creek, July 14, 1897, Rydherg & Bessey, 4332; 

 Bridger Mts., June 14-18, 4333, 4334 and 4335; Spanish Basin, 

 1896, Rlodman, 3^2; 1893, J/r5. Moore; Lo-Lo Canon, 1880, Wat- 

 son, 112, in part. 

 Fragaria platypetala Rydberg, Mem. Dept. Bot. Columbia Univ. 2 : 



177 ; Rragaria Virginiana Illinoensis Wats. Bot. Cal. i : 177 

 [Man. R. M. 83] ; not Gray. 



The eastern variety to which this has been referred is found from 

 Ohio to Kansas, and R. -platypetala from British Columbia and Cali- 

 fornia to Wyoming. The latter is to be distinguished by its very 

 large petals, longer looser and fewer hairs and the more or less 

 'glaucous leaves ; it differs from the next species by the spreading 

 hairs of the scape. Extends up into the mountains to an altitude of 

 2500 m. 



Montana: Spanish Basin, June 28, 1897, Rydberg & Bessey, 

 4836; Bridger Mts., June 14-17, 4337 and 4339; 1894, 3frs. Moore. 



