295] FLORA OF BOULDER, COLORADO 147 



Geum Rossii humilis of Coulter's Manual, but genuine G. 

 Rossii humilis T. & G. comes no nearer than Unalaska, the 

 type locality. A. turbinata (Rydb.) Greene is a low plant, 7-15 

 cm. high, usually I- flowered. 



At timberline, Arapahoe Peak, 11500 ft. (Daniels, 906). 



231. HOLODISCTJS Max. MEADOWSWEET. 



571. H. dumosus (Nutt.) Heller. [Spiraea dumosa Nutt.]. 



BUSHY MEADOWSWEET. 



Boulder County (McFarland). 



WYOMING and UTAH to COLORADO and ARIZONA. 



232. KTTNZIA Spreng. PURSHIA. 



572. K tridentata (Pursh) Spreng. [Purshia tridentata 

 (Pursh) DC.]. THREE-TOOTHED PURSHIA. 



Rocky hillsides, 6500-8500 ft.; head of Gregory Canon; 

 north of Nederland (Ramaley). Boulder Canon, 9000 ft. 

 (Coulter in Wabash College Herb.). 



MONTANA to WASHINGTON; NEW MEXICO to CALIFORNIA. 



233. CERCOCARPUS H. B. K. MOUNTAIN MAHOG- 

 ANY. 



573. C. parvifolius Nutt. SMALL-LEAVED MOUNTAIN MAHOG- 

 ANY. 



High mesas fronting the Flat-irons, 5700-6000 ft. (Dan- 

 iels, 172). Also from Eldora to Baltimore (Rydberg). 

 SOUTH DAKOTA to MONTANA; NEW MEXICO to UTAH. 



234. DRYAS L. 



574. D. octopetala L. WHITE MOUNTAIN AVENS. 



Above timberline, Arapahoe Peak, 11500-13500 ft. (Dan- 

 iels, 939). Also mountains south of Ward (Rydberg). 

 Arctic-alpine around the world. 



235. AGRBIONIA L. AGRIMONY. 



575. A. Brittoniana occidentalis Bickn. WESTERN AGRIMONY. 

 Plains, and canons among the foothills, 5100-7500 (Bear 



Canon) ft. (Daniels, 259). 



SOUTH DAKOTA to WYOMING ; NEW MEXICO to ARIZONA. 



