336 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Montana: Bridger Mountains, June 17-18, 1897, Rydherg & 

 Bessey, 48 yj and 48"/ 4. 



Mertensia paniculata (Ait.) Don, Gen. Syst. 4: 318 [111. Fl. 3: 



60 ; Syn. FI. 2' : 201 ; Man. R. M. 262] ; Piihnonaria faniculata 



Ait. Hort. Kew. I : 181. 



Along streams, up to an altitude of 2500 m. 



Montana: Electric Peak, August 18, 1897, Rydberg & Bessey^ 

 4864. 



Mertensia nivalis (Wats.) ; Mertensia paniculata nivalis Wats. 



King's Exped. 5: 239 [Syn. Fl. 2': 201]. 



This is evidently not related to J/. J^auiculata, lacking the leaves 

 as well as the sepals of that species. In the size of the plant and 

 general habit it resembles closely J/, lanceolata, but differs from 

 that plant in the longer corolla-tube and the narrower linear se- 

 pals. It is a subalpine plant, growing at an altitude of 2300 m. 



Montana: Wolf Butte, 1892, R. S. Williams, ijo; Bozeman 

 Pass, 1883, Scrihner, ij6. 



Idaho : Mt. Chauvet, July 29, 1897, Rydberg (S: Bessey, 486^. 



Mertensia lanceolata (Pursh) DC. Prod. 10: 88 [111. Fl. 3: 60; 



Syn. Fl. 2^ : 201 ; Man. R. M. 262] ; Piihnonaria lanceolata 



Pursh, Fl. Am. Sept. 729. 



Subalpine hillsides, in wet places, at an altitude of 2000-2500 m. 



Montana: Spanish Basin, 1896, Flodinan, 75^ and 75^; Bridger 

 Mountains, June 15, 1897, Rydberg & Bessey, 48^0; Cedar Moun- 

 tain, July 16, 48^1; Madison Co., JMrs. Flora Mcl^ulty ; Upper 

 Marias Pass, 1883, Canhy, 244. 



Mertensia oblongifolia Don, Gen. 4: 372 [Syn. Fl. 2^: 200; Man. 



R. M. 262] ; Piihnonaria oblongifolia Nutt. Journ. Acad. Nat. 



Sci. Phila. 7 : 43. 



In wet places, on subalpine hills, at an altitude of 2000—3000 m. 



Montana: Beaver Head Co., 1888, F. Tzueedy, 84; Deer 

 Lodge, 1888, F. W. Traphagcn; Helena, 1883, F. Tweedy; 

 Cedar Mountain, July 16, 1897, Rydberg & Bessey, 4868; Old 

 Hollowtop, July 9, 1897, 486g; Helena, 1891, F. D. Kelsey ; Deer 

 Lodge, 1892, W. T. Shazv. 



* Mertensia Tweedyi. 



Low and tufted, glabrous and rather fleshy ; stems decumbent 

 or seldom ascending, often less than i cm. long ; leaves minutely 



