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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 Canon; Massif de l’Arapahoe; near Pagosa 
Peak; Rist Canon; 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 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 Plutne. 
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.; S', 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 Canon; 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 l’Arapahoe; Beaver Creek; Leroux Park, Graymont; 
Gore Pass; Anita Peak. 
11. SPATULARIA Haw. 
1. 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, $.5-6.5 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. anstromontana. 
Petals yellow, broadly obovate ; plant with flagelliform stolons. 
4. L. dagellaris. 
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 l’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. 
