285] FLORA OF BOULDER, COLORADO 1 37 



209. OZOMELIS Raf. MITRE-WORT. 



516. 0. stenopetala (Piper) Rydb. [Mitella stenopetala Piper]. 

 NARROW-PETALLED MITRE-WORT. 



Springy places, Eldora to Baltimore (Rydberg). 

 Redrock lake, 10100 ft. (Ramaley & Robbins). 

 COLORADO to UTAH. 



210. HEUCHERA L. ALUM-ROOT. 



517. H. bracteata (Torr.) Ser. BRACTED ALUM-ROOT. 

 Common in the crevices of rocks, 5800-10000 ft. (Daniels, 



139). Also in the mountains between Sunshine and Ward, and 

 from Eldora to Baltimore (Rydberg). 

 WYOMING to COLORADO. 



518. H. Hallii Gray. HALL'S ALUM-ROOT. 



Rocky places, Arapahoe Peak, 11500-12000 ft. (Daniels, 



881). 



COLORADO. 



519. H. parvifolia Nutt. SMALL-LEAVED ALUM-ROOT. 

 Common on banks in the mesas, foothills, and mountains 



throughout, 5700-12000 ft. (Daniels, 98). Also at Ward and 

 Caribou (Rydberg). 

 ALBERTA to OREGON ; NEW MEXICO to ARIZONA. 



211. SAXIFRAGA L. SAXIFRAGE. 



520. S. debilis Engelm. WEAK SAXIFRAGE. 



Wet rocks, Massif de T Arapahoe, 9000-13000 ft. (Ryd- 

 berg). 



MONTANA to COLORADO and UTAH. 



212. MICRANTHES Haw. 



521. M. rhomboidea (Greene) Small [Saxifraga rhomboi- 

 dea Greene]. RHOMBOID-LEAVED SAXIFRAGE. 



Among rocks in the foothills and mountains, Flagstaff Hill, 

 6000 ft. (Daniels). Also Massif de V Arapahoe, 12000 ft., 

 and Eldora to Baltimore (Rydberg). Near Long's Peak 

 (Coulter in Wabash College Herb.). Saxifraga nivalis L., re- 

 ported by Ramaley & Robbins from Redrock lake, 10100 ft., 



