MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 277 



Epilobium Hornemanii Reichenb. Icon. Crit. 2 : 73 [Trelease, Mon. 



105 ; 111. Fl. 2 : 485] ; Epilohimn alpiniun Wats. Bot. Cal. i : 



217 [Man. R. M. 102]. 



This, as well as the three following species, is low, 1-2 dm. high, 

 and more or less stoloniferous ; it and E. clavatiDU have purplish 

 flowers, and mostly papillose seeds ; E. Horncnianii\\'A's> larger thinner 

 leaves than the other species, the upper being broadly ovate, often re- 

 motely serrulate, and abruptly rounded into a very short petiole. 

 Among rocks, at an altitude of 2500-3500 m. 



Montana: Spanish Basin, 1896, Elodnian, 66 j, 666 and 6'j/f.; 

 Little Belt Mts., 66 j ; Bridger Mts., 668; Deer L.odcre, M/ss Em?na 

 Ware; Mill Creek, 1887, Tzuecdy, 2J4.; Granite, 1892, Kelsey. 



Yellowstone Park: Upper Falls, Aug. 14, 1897, Rydhcrg & 

 Bessey, 4570; East De Lacy's Creek, Aug. 10, 4364 and 4363; 

 Soda Butte, 1885, Tzvccdy, ^ig; Lower Falls, 1877, Haydcn. 



* Epilobium alpinum L. Sp. PL 348 [Trelease, Ann. Rep. Mo. Bot. 



Gard. 2: 108: 111. Fl. 2: 482]. 



Resembling the last, but leaves and flowers smaller, the latter 

 white or light rose. It often grows with the preceding and has 

 frequently been confused with it. 



Montana: Bridger Mts., 1896, Elodman, 66g and 6ji: Little 

 Elk Mts., 670; Spanish Peaks, 672; Cedar Mountain, July 16, 

 1897, Rydherg & Bcssey, 4362; Bridger Mts., June 12, 4363; 

 Columbia Falls, 1892, B. S. Williams, 880. 



* Epilobium anagallidifoliumLam. Encycl. Meth. 2 : 376 [Trelease, 



Ann. Rep. Mo. Bot. Gard. 2: no; 111. Fl. 2: 482]. 



It differs from the last by the more slender s-shaped bent stem, 

 and the smaller narrowly oval or oblong entire leaves, and grows in 

 alpine regions, at an altitude of about 3000 m. The flowers are 

 sometimes violet. 



Montana: Long Baldy, Little Belt Mts., 1896, Flodman, 673; 

 Electric Peak, Aug., 1897, Rydhcrg & Bessey, 4366. 



* Epilobium clavatum Trelease, x\nn. Rep. Mo. Bot. Gard. 2: in. 



This resembles E. Hornemanii in the color of the flowers and the 

 papillose seeds, but the flowers are smaller. In the leaves and gen- 

 eral habit it most resembles the preceding, from which it is often 

 hard to distinguish. The plant is much more cespitose than either 

 and forms rather large mats in gravelly or rocky places near the tops 

 of the higher mountains, at an altitude of about 3000 m. 



