170 CRASSULACEAE. 



2. CLEMENTSIA Rose. RED ORPINE. 



i. Clementsia rhodantha (A. Gray) Rose. (Sedum rhodanthum A. Gray) 

 In meadows and along streams from Mont, to Colo, and Ariz. Alt. 10,000- 

 13,000 ft Gray's Peak; headwaters of Clear Creek; Caribou; Pike's Peak; 

 Gore Pass; Cameron Pass; Pagosa Peak; Villa Grove; Dark Canon; Mar- 

 shall Pass; near Georgetown; Twin Lakes; Chambers' Lake; Berthoud Pass. 



3. RHODIOLA L. ROSE-ROOT, ROSE-WORT. 



Flowers dioecious ; carpels 3-5 mm. long, abruptly contracted into a short di- 

 vergent or reflexed beak. i. R. integrifolia. 



Flowers polygamous ; carpels 6-8 mm. long, gradually tapering into a long 

 ascending beak. 2. R. polygama. 



1. Rhodiola integrifolia Raf. (Sedum rhodiola Coult, in part; not DC.; 

 Sedum frigidum Rydb.) On high alpine peaks from Alb. and Alaska to 

 Colo, and Calif. Alt. 9000-14,000 ft. Pike's Peak; Mount Garfield; Gray- 

 back mining camps; West Spanish Peak. 



2. Rhodiola polygama (Rydb.) Britt. & Rose. (Sedum polygamum Rydb.) 

 On alpine peaks of Colo, and N. M. Alt. 9000-13,000 ft. Engineer Moun- 

 tain ; headwaters of Clear Creek ; Carson ; Basin Creek, La Plata Mountains ; 

 Mount Hesperus; near Ironton; Pike's Peak; Chambers' Lake; Mt. Lincoln; 

 West Spanish Peak; South Park; Leroux Park; Estes Park; Bethoud Pass. 



4. SEDUM L. STONE-CROP, ORPINE. 



i. Sedum stenopetalum Pursh. On dry rocky or gravelly hills from Alb. 

 and B. C. to N. M. and Calif. Alt. 4000-12,000 ft. Gray's Peak; Pike's 

 Peak ; Clear Creek Canon ; Colorado Springs ; headwaters of Clear Creek ; 

 Cameron Pass; Larimer Co.; Hamor's Lake; Bald Mountain; Mt. Garfield; 

 Grayback mining camp; Silver Plume; Morrison; Telluride; Minnehaha; 

 Cimarron; Denver; West Spanish Peak; Ft. Collins; Ironton; Green Moun- 

 tain Falls ; Howe's Gulch ; mountains southeast of Cameron Pass ; forks of 

 Poudre and Big South; gulch west of Pennock's; Horsetooth Gulch; near 

 Narrows ; Dixon Canon ; Table Rock ; mountains between Sunshine and 

 Ward. 



Family 62. SAXIFRAGACEAE Dumort. SAXIFRAGE FAMILY. 



Placentae parietal, sometimes nearly basal. 



Flowers solitary and axillary to leaf-like bracts, or 2-4 in small corymbs, each 

 subtended by a leaf-like bract. i. CHRYSOSPLENIUM. 



Flowers in more or less elongated racemes or panicles. 



Flower-stalk axial from a slender bulbiferous rootstock ; gynoecium 3-car- 



pellary. 2. LITHOPHRAGMA. 



Flower stalks a lateral shoot from a stout scaly rootstock ; gynoecium 2-car- 



pellary. 

 Inflorescence racemose. 



Petals pinnately cleft or pinnatifid. 3. PECTIANTIA. 



Petals entire, toothed or 3-cleft above. 4. OZOMELIS. 



Inflorescence paniculate; petals broadened upward. 5. HEUCHERA. 

 Placentae axial. 



