264 UNIVERSITY OF MISSOURI STUDIES [^12 



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

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

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

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

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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 

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

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