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MONOGRAPHS AND RELATED MATERIAL 



Botanical (especially taxonomic) publications covering range families, genera, 

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grasses of north America. Rev., 2 v., illus. New York. 1896. 



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Blake, S. F. (468) 



varieties of chimaphila umbellata. Rhodora 19: 237-244. 1917. 

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KEY TO THE GENUS DIPLOSTEPHIUM, WITH DESCRIPTIONS OF NEW SPECIES. 



U. S. Natl. Mus., Contrib. U. S. Natl. Herbarium 24: 65-86, illus. 1922. 



