174 SAXIFRAGACEAE. 



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

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

 Alt. 5000-1 J.ooo 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 I'Arapahoe ; near Pagosa 

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

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

 Routt Co. 



2. Micranthes arnoglossa (Greene) Small. (Saxifraga anioglossa 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.; i". 

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

 along streams from j\Iont. 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 Caiion; Cameron Pass; Ruby; headwaters of Pass 

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

 Gore Pass ; Anita Peak. 



II. 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. I. L. chrysantha. 



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



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. iJagellaris. 



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. 



2. 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. 



