MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



99 



* Calochortus macrocarpus Dougl. Hort. Trans. 7: 275 [Bot. Cal. 



2: 176; Wats. Rev. 266]. 



Resembles somewhat C. Niittallii, but the petals are purplish and 

 acute. It is rare within the region. 



Montana: Flathead Lake, 1883, Tzceedy, 327. 



* Calochortus acuminatus Rydb. Bull. Torr. Bot. Club, 24: 188. 



Distinguished from C. NuttaUii by its acute petals and longer 

 tapering anthers. Dry hillsides, at an altitude of 2000-3000 m. 

 Montana: Lima, August 5, i8()$, Rydbej-g; ^(5oo; Fort Custer, 



1891, Tzuecdy : Cliff Lake, July 27, 1897, Rydberg & Besscy, j8yj. 



Calochortus Wuttallii T. & G. Pac. R. R. Rep. 2 : 124 [Man. R. M. 



352; 111. Fl. i: 422: Bot. Cal. 2: 177; Wats. Rev. 266]. 



Dry hillsides at an altitude of 1000-2000 m. 



Montana: Priest's Pass, id,gi, Kehcy ; Custer Co., 1892, J/r^. 

 I^ight. 



Calochortus Gunnisoni Wats. Bot. King's Exp. 5:348 [Man. R. 



M. 352; 111. Fl. i: 422; Bot. Cal. 2: 177; Wats. Rev. 267]. 



Hillsides and dry mountain valleys, at an alutude of 1000-2000 m. 



Montana : Little Belt Mts., 1896, Flodnian, J48; Madison Creek, 

 1897, P. Koch, 61 : Little Belt Mts., 1883, Scr/bncr, 2S3. 



* Calochortus nitidus Dougl. Hort. Trans. 7 : 277 [Wats. Rev. 264] ; 



CalocJiorlus cnrycarpus Wats. Bot. King's Exp. 5 : 348. 

 Characterized by the umbellate inflorescence, the sharply 3- 

 winged pod and the rather small acute petals. 

 Yellowstone Park: 1873, C. C. Parry, 263. 



* Calochortus pavonaceus Fernald, Bot. Gaz. 19: 335. 



Differs mainly from C. nitidus in the larger size of the flowers, 

 which are generally slightly tinged with purple. It grows in mead- 

 ows, at an altitude of 2000-3000 m. 



Montana: Silver Bow Co. and Beaver Head Co., 1888, F. 

 Tzueedy, 42; Deer Lodge, 3fiss Prances Hobson ; Priest's Pass, 



1892, Kelscy. 



Yellowstone Park : Lake, 187 1, Harden. 



Idaho: Henry's Lake, Aug. i, 1897, Rydberg <£- Bessey, 3874. 



Lloydia serotina (L.) Sweet, Hort. Brit. Ed. 2, 52 [Man. R. M. 

 352 ; Bot. Cal. 2 : 145 ; Wats. Rev. 261] ; Anthericiim serotinwni 

 L. Sp. PI. Ed. 2, 444. 

 On the higher mountain tops, at an altitude of 2500 m. and more. 



