264 UNIVERSITY OF MISSOURI STUDIES [4 1 2 



Rothrock, J. T. Catalogue of plants. U. S. Geog. Surv. west 

 of the 100th meridian, 6, 53-352. 



Rydberg, P. A. Studies on the Rocky Mountain flora. I. Bull. 

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 IV. ibid., 28, 20-38; V. ibid., 266-283; VI. ibid., 499-513; VII. ibid., 

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 666; XIV. 32, 123-138; XV. ibid. 597-611; XVI. ibid., 33, 137-161; 

 XVII. ibid., 34, 35-50; XVIII. ibid., 417-437; XIX. ibid., 36, 531-541; 

 XX. ibid., 675-698; XXI. ibid., 37, 127-148; XXII. ibid., 313-335; 

 XXIII. ibid., 443-471; XXIV. ibid., 541-557; XXV. ibid., 38, 11-23. 



Rydberg, P. A. The oaks of the Continental Divide north of 

 Mexico. Bull. N. Y. Bot. Card., 1901. 



Rydberg, P. A. Astragalus and its segregates as represented 

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Rydberg, P. A. Flora of Colorado. Bull. 100, Colo. Agric. Coll. 

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Rydberg, P. A., and Shear, C. L. A report upon the grasses 

 and forage plants of the Rocky Mountain region. Bull. 5, Div. of 

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Sudworth, G. B. Forest flora of the Rocky Mountains. Bull. 2, 

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Thacher, Mrs. G. W. Alpine flowers of Colorado. Appalachia, 

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Torrey, John, and Gray, Asa. (A botanical report of plants 

 collected by Mr. F. Crentzfeldt). Pacific Railroad report, 2, 125- 

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Vasey, George. Report on grasses of Kansas, Nebraska, and 

 Colorado. Bull. 1, Botanic. Div., U. S. Dept. of Agric. 



