74 UNIVERSITY OF COLORADO STUDIES 



232-46; IX, ibid., pp. 680-93; X, ibid., Vol. XXX, pp. 247-62, 1903; XI, ibid., 



Vol. XXXI, pp. 399-410, 1904; XII, ibid., pp. 555-75; XIII, ibid., pp. 631-66; XIV, 



ibid., Vol. XXXII, pp. 123-38, 1905; XV, ibid., pp. 597-611; XVI, ibid., Vol. 



XXXIII, pp. 137-61, 1906. 

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



Garden, 1901. 

 , "Further Studies on the Potentilleae, I. West American Species," Bull. Torr. Bot. 



Club, Vol. XXVIII, pp. 173-83, 1901. 

 , "Astragalus and its Segregates as Represented in Colorado," Bull. Torr. Bot. 



Club, Vol. XXXII, pp. 657-68, 1905. 



'Flora of Colorado," Bull. 100, Colo. Agricultural College Exper. Sta., 1906. [This 



most important of contributions to Colorado botany has made possible intelligent 



work on distribution and ecology by students who do not give their entire time to 



taxonomy. It is a complete catalogue of species with range, locality, altitude, etc., 



so far as known to Dr. Rydberg.] 

 Rydberg, P. A., and Shear, C. L., "A Report upon the Grasses and Forage Plants 



of the Rocky Mountain Region," Bull No. 5, Div. of Agrostology, U. S. Dept. Agric, 



1897. 

 Sayre, L. E., "Loco Weed," 6th Biennial Rept. State Board of Agriculture (Kansas), 



Pt. II, pp. 147-51- 

 Shantz, H. L., "A Study of the Vegetation of the Mesa Region East of Pike's Peak; 



The Bouteloua Formation," Bot. Gazette, Vol. XLII, pp. 16-47, 1906. [Structure of 



the formation with map and seven figures.] 

 , "A Study of the Vegetation of the Mesa Region East of Pike's Peak; The Bouteloua 



Formation," Bot. Gazette, Vol. XLII, pp. 179-207, 1906. [The development of the 



formation with six figures.] 

 , "A Biological Study of the Lakes of the Pike's Peak Region," Transactions of 



the Amer. Microscopical Society, Vol. XXVII, pp. 75-98, 1907. [Gives list of collections 



made and names some algae and entomostraca.] 

 Sargent, Charles S., "Report on the Forests of North America," Tenth Census of 



the United States, Vol. IX, Washington, 1884. [On pages 567 and 568 a general 



statement is made in regard to the forests of Colorado. There is also a forest map.] 

 Saunders, De Alton. Collected in Colorado. Fide Rydberg in litt. 

 Shear, C. L. (joint author with P. A. Rydberg, which see). 

 Small, John Kunkel, "A Monograph of the North American Species of Polygonum," 



Memoirs from Depart, of Bot. of Columbia College, Vol. I, pp. 180, 84 plates. [Cer- 

 tain species from Colorado.] 

 (joint author with Rydberg, P. A., in the account of Polygonaceae in the Flora 



of Colorado; see Rydberg). 

 Smiley, Jerome C, History of Denver. Denver: The Times-Sun Pub. Co., 1901. 



[Contains outlines of the earlier history of the Rocky Mountain country with account 



of exploring expeditions and many illustrations.] 

 Smith, B. H. Collected in 1869. Fide Porter. 

 Smith, George. Collected in 1871. Fide Porter. 

 Smith, J. Alden, " Report on the Development of the Mineral, Metallurgical, Agricultural, 



Pastoral and Other Resources of Colorado," Colo. Geol. Report, 1881-1882, pp. 151. 



