28o 



UNIVERSITY OF COLORADO STUDIES 



, and Dodds, G. S., "Two Imperfectly Known Species of Crataegus," Bull. Torrey 



Botanical Club, Vol. XXXV, pp. 581-583, 1908. 

 , and Robbins, W. W., "Studies in Lake and Streamside Vegetation; Redrock 



Lake near Ward, Colo." University of Colorado Studies, Vol. VI, pp. 133-168, 1909. 

 Robbins, W. W., "Studies of Mesa and Foothill Vegetation; Deciduous Trees and Shrubs 



of the Mesas," University of Colorado Studies, Vol. VI, pp. 36-47, 1908. 

 and Dodds, G. S., "Studies in Mesa and Foothill Vegetation; Distribution of Con- 

 ifers on the Mesas," University 0} Colorado Studies, Vol. VI, pp. 31-36, 1908. 

 Rothrock, J. T., "Notes on Colorado," U. S. Geog. Surv. West 0} the 100th Meridian 



(Wheeler Report), Vol. VI, pp. 1-15. 

 Rydberg, P. A., "The Oaks of the Continental Divide North of Mexico," Bull. N. Y. 



Botanical Garden, 1901. 

 , Flora 0} Colorado, Bull. 100, Colo. Agric. Coll. Exper. Sta., pp. 1-447, Ft. Collins, 



Colo., 1906. 

 Sargent, Charles S., Report on the Forests of North America; 10th Census of the United 



States, Vol. IX, Washington, 1884. 



, Manual of the Trees of North America, pp. 1826, Boston, 1905. 



Schneider, E. C, " The Distribution of Woody Plants in the Pikes' Peak Region," 



Colorado College Pnblicatious (Science Series), Vol. XII, pp. 137-170, 1909. 

 Young, Robert, T., "Forest Formations of Boulder County, Colorado," Botanical 



Gazette, Vol. XLVI, pp. 321-352, 1907. 



Alphabetical Index of Trees 



PAGE 



Abies concolor 263 



lasiocarpa 263 



Acer glabrum 276 



grandidentatum .... 276 



interior 276 



Alder 268 



Alnus tenuifolia 268 



Amelanchier alnifolia .... 272 



Ash 278 



Aspen 264 



Betula andrewsii 268 



fontinalis 268 



Birch 268 



Buckthorn 278 



Cascara sagrada 278 



Cercocarpus ledifolius .... 271 



Cedar 263 



Celtis douglasii 270 



reticulata 270 



Colorado blue spruce .... 261 



PAGE 



Crataegus chrysocarpa . . . -274 



coloradensis 272 



coloradoides 274 



erythropoda 272 



doddsii 274 



laurentiana 274 



occidentalis 274 



rivularis 274 



saligna 274 



Douglas spruce 262 



Cottonwood 264 



Fir 262 



Fraxinus anomala 278 



Hackberry 270 



Hawthorn 272 



Juniper 263 



Locust 276 



Maple 276 



Mountain mahogany .... 271 



Oak 269 



