174 SAXIFRAGACEAE. 



1. Micranthes rhomboidea (Greene) Small. (Saxifraga rhomboidea 

 Greene.) Among rocks in the mountains from Mont, and Ida. to Colo. — 

 Alt. 5000-12,000 ft. — Gray's Peak; West Spanish Peak; near Ironton; Grand 

 Mesa ; Marshall Pass ; Seven Lakes ; Black Rock Creek ; Pike's Peak ; Ft. 

 Collins ; Georgetown ; foot-hills, Larimer Co. ; Tennessee Pass ; Bear Creek 

 Divide, West La Plata Mountains; Iron Mountain; headwaters of Beaver 

 Creek; gulch west of Dixon Caiion; Massif de 1' Arapahoe; near Pagosa 

 Peak ; Rist Canon ; mountains west of Cameron Pass ; Soldier Caiion ; Boreas ; 

 Beaver Creek ; Eldora to Baltimore ; Berthoud Pass ; Rabbit-Ear Range, 

 Routt Co. 



2. Micranthes arnoglossa (Greene) Small. (Saxifraga arnoglossa Greene.) 

 On hills and mountains from Mont, and Wash, to Colo, and Calif. — Alt. 9000- 

 12,000 ft. — Mountains of Delta Co. ; Marshall Pass ; Silver Plume. 



3. Micranthes brachypus Small. In the mountains from Colo, to Nev. — 

 Alt. 11,000-12,000 ft. — Half-Moon Creek; Berthoud Pass. 



4. Micranthes arguta (D. Don.) Small. (Saxifraga arguta D. Don.; S. 

 dcnudata Nutt. ; 5. punctata Hook., in part; not L.) In springy places and 

 along streams from Mont, and B. C. to N. M. and Calif. — Alt. 8000-12,000 

 ft. — Mountains between Sunshine and Ward; Villa Grove; Mt. Abram, 

 Ouray; Dark Caiion; Wyoming line in North Park; Georgetown; Middle 

 Park; Grayback mining camps; near Pagosa Peak; Pike's Peak; Rabbit- 

 Ear Range ; headwaters of Clear Creek ; Silver Plume ; Clear Lake ; Berthoud 

 Pass; Upper La Plata Canon; Cameron Pass; Ruby; headwaters of Pass 

 Creek; Massif de I'Arapahoe; Beaver Creek; Leroux Park, Graymont; 

 Gore Pass ; Anita Peak. 



n. SPATULARIA Haw. 



I. Spatularia Vreelandii Small. On the higher peaks of Mont, and Colo. 

 — Mt. Evans. 



12. LEPTASEA Haw. 



Leaf-blades not spine-tipped at the apex, more or less ciliate. 



Petals suborbicular or oval, 5.5-6.5 mm. long, abruptly narrowed into short 



claws. 1. L, chrysantha. 



Petals elliptic to oblong, 9-13 mm. long, clawless. 2. L. Hirculus. 



Leaf-blades spine-tipped at the apex. 



Petals white, usually spotted, oblong or oblong-lanceolate or elliptic; plant ces- 

 pitose, not stoloniferous. 3. L. austromontana. 



Petals yellow, broadly obovate; plant with flagelliform stolons. 



4. L. Aagellaris. 



1. Leptasea chrysantha (A. Gray) Small. (Saxifraga chrysantha A. Gray) 

 On alpine peaks, among rocks, of Colo.— Alt. 11,000-14,000 ft.— Pike's Peak; 

 Mt. Bartlett; Central City; Gray's Peak; mountains of Estes Park; Massif 

 de I'Arapahoe; Berthoud Pass. 



X. Leptasea Hirculus (L.) Small. (Saxifraga Hirculus L.) On the higher 

 mountains, in wet places, from Greenl. and Alaska to Colo, and B. C. ; also 

 in Europe and Asia.— Alt. 9000-11,000 ft.— Beaver Park; Twin Lakes; 

 Caribou. 



