172 SAXIFRAGACEAE. 



4. OZOMELIS Raf. Mitre-wort. 



Petals 3-fid to the middle ; hypanthium with the sepals 3-5 mm. long. 



I. O. stauropetala. 



Petals entire or 3-fid only at the apex ; hypanthium with the sepals 1.5-3 wi- long. 



Hypanthium with the sepals 2-3 mm. long ; leaf-blades indistinctly lobed and 



with shallow crenulations ; petals often entire. 2. O. stenopetala. 



Hypanthium with the sepals 1.5-2 mm. long; leaf-blades distinctly lobed and 

 deeply crenate ; petals 3-cleft. 3. O. Parryi. 



1. Ozomelis stauropetala (Piper) Rydb. (Mitella stauropetala Piper; M. 

 triada Coulter, in part.) In springy places in the woods from Mont, and 

 Wash, to Colo, and Ore. — Alt. about 10,000 ft. — Mt. Hesperus. 



2. Ozomelis stenopetala (Piper) Rydb. {Mitella stenopetala Piper) In 

 springy places in Utah and Colo. — Alt. 8000-10,000 ft. — Mt. Hesperus ; Eldora 

 to Baltimore. 



3. Ozomelis Party i (Piper) Rydb. {Mitella stenopetala Parryi Piper) 

 Mountains of Wyo. and Colo. — Alt. about 9500 ft. — Trapper's Lake. 



5. HEUCHERA L. Alum-root. 



Stamens equalling or exceeding the sepals. 



Panicle open, not spike-like ; plant tall ; hypanthium very oblique. 



1. H. hispida. 

 Panicle contracted, dense, spike-like ; plant low ; hypanthium not very oblique. 



2. H. bracteata. 

 Stamens much shorter than the sepals. 



Hypanthium campanulate, yellowish or pinkish ; sepals almost erect. 



3. H. Hallii. 

 Hypanthium saucer-shaped, greenish ; sepals spreading. 4. H. parvifolia. 



1. Heuchera hispida Pursh. In woods and on hillsides, Ont. to Ass., Va. 

 and Colo. — Edgerton. 



2. Heuchera bracteata (Torr.) Ser. On rocky ridges in Colo, and northern 

 Wyo. — Alt. 6000-10,000 ft. — Rist Caiion; Grand Lake; Georgetown; Andrew's 

 Shetland ranch ; foot-hills, Larimer Co. ; Gray's Peak ; North Cheyenne 

 Canon ; Boulder Caiion ; road between Denver and Idaho City ; Horsetooth 

 Mountain; mountains between Sunshine and Ward; Eldora to Baltimore; 

 Berthoud Pass; between Denver and Idaho City; Golden; Empire. 



3. Heuchera Hallii A. Gray. On rocky ridges in Colo. — Alt. 7000-12,000 ft. 

 — Mt. Garfield ; Cameron's Cone ; Pike's Peak ; Rock Mountain Pass ; George- 

 town; Ruxton; Pike's Peak; Cheyenne Mountain; Bald Mountain; Grand 

 Caiion of the Arkansas; Graymont. 



4. Heuchera parvifolia Nutt. On hills from Alb. a^A Ore. to N. M. and 

 Ariz. — Alt. 6000-13,000 ft. — Mt. Abram, Ouray; foot-hills, Larimer Co.; 

 Cameron Pass; Howe's Gulch; Minnehaha; Marshall Pass; Colorado 

 Springs ; Douglass Mountain, Georgetown ; Van Boxle's ranch, above Cimar- 

 ron; Halfway House; Chicken Creek, West La Plata Mountains; 

 Grizzly Creek; near La Veta; Ojo; Cumberland Basin; Upper La Plata 

 Canon; North Cheyenne Caiion; near Pagosa Peak; Ironton; Wahatoya 

 Canon ; Veta Pass ; Mt. Princeton ; West Spanish Peak ; Ward, Boulder Co. ; 

 Red Mountain ; Manitou ; Lake City ; Caribou ; Dillon Cation, Trinidad ; Estes 

 Park; Empire; northeast of Boreas; Spring Canon; Dixon Caiion; Horse- 



