72 UNIVERSITY OF COLORADO STUDIES 



Ramaley, Francis, and Robbins, W. W., " Rock Ridge Vegetation of Northern Colorado," 



Science, Vol. XXVII, pp. 208, 209, 1908. [Abstract of a paper read at the Chicago 



meeting of A. A. A. S. January 1908.] 

 , "Ecological Notes from North-Central Colorado," Univ. of Colo. Studies., Vol. 



V, pp. 111-17, 1908. [Describes vegetation at Red Mountain and the conglomerate 



plains and a gulch study on the North Box Elder.] 

 Ransome, F. L., "Ecomomic Geology of the Silverton Quadrangle, Colorado," Geol. 



Survey Bull. No. 182, pp. 265. House Documents, Vol. XCVIII, 57th Congress, 



1st session, 1901-1902. [An account of the climate and vegetation of the Silverton 



Quadrangle, pp. 13-29.] 

 Redfield, J. H. Collected in 1872. Fide Porter. 

 Renauld, F., and Cardot, J., "New Mosses of North America," Bot. Gazette, Vol. XIX, 



pp. 237-40, 1894. [Timmia austriaca Hedw. var. brevifolia; Pylaisia polyantha 



Sch. var. coloradensis and Brachythecium suberythrorrhizon collected by J. M. 



Holzinger in Boulder, Colo.] 

 , "New Mosses of North America," Bot. Gazette, Vol. XXII, pp. 48-52, 1896. 



[Philontis venella C. Meull. var. coloradensis found in Springdale, Boulder Co., Colo.] 

 Richardson, A. D., "The Colorado Variety of the Douglas Fir," Gard. Chron, p. 244, 



1903. [There are three geographical forms of this, Pseudotsuga glauca, macrocarpa 



and taxifolia. The Colorado variety is hardier than the Pacific form.] 

 Robbins, Wilfred W. Collected specimens for University of Colorado herbarium in 



1906, 1907 and 1908 from various parts of northern Colorado. Ecological studies 



of the mesas and of mountain lakes. Address: University of Colorado, Boulder, Colo. 

 Robbins, W. W., "Tubular Ray Flowers in Gaillardia aristata," Torreya, Vol. VI, p. 



190, 1906. [Material collected near Boulder.] 

 , "Variation in Flower Heads of Gaillardia aristata," Biontetrika, Vol. VI, pp. 



106-8, March, 1908. 

 , "Studies of Mesa and Foothill Vegetation; 4. Deciduous Trees and Shrubs of the 



Mesas," Univ. of Colo. Studies, Vol. VI, pp. 36-49, 1908. [Mesas south of Boulder. 



Colo. Maps, charts and photographs.] 

 (see also Ramaley). 



Robbins, W. W., and Dodds, Gideon S., "Studies in Mesa and Foothill Vegetation; 



3. Distribution of Conifers on the Mesas," Univ. of Colo. Studies, Vol. VI, pp. 



31-36, 1908. 

 Robinson, B. L., "Three New Choripetalae from North America and Mexico," Bot. 



Gazette, Vol. XXVIII, pp. 134-36, 1899. [Arabis crandallii collected by Professor 



C. S. Crandall at Cimmarron, Montrose Co., Colo.] 

 Rolfs, F. M., "Potato Failures," Bull. No. 70, Colo. Agricultural College Exper. Sta., 



pp. 1-19, 1902. [This is an account of a destructive disease of the potato, the nature 



of the fungus and its methods of attack, inocxilation experiments, etc.] 

 , "Potato Failures," Bull. No. gi, Colo. Agricultural College Exper. Sta., pp. 1-33, 



1904. [Gives the results of experiments and study of the potato fungus, plant injuries, 



spread of the disease and remedial measures.] 

 (joint author with Paddock W., which see). 



Rose, J. N. (joint author with Coulter, John M., which see). 



Rothrock, J. T., "Notes on Colorado," U. S. Geog. Survey West of the 100th Meridian 



