WORKS OF EEPERENCE. xvii 



Engler und Prantl, Die natilrlichen PflanzenfamUien. Engelmann, 

 Leipzig. 



All of these are of great value, especially the rather expensive 

 work of Engler and Prantl, now in course of publication. 



FLORAS. 



Gray, Manual of Botany. American Book Company. 



Chapman, Flora of the Southern United States. American Book 

 Company. 



Coulter, Manual of the Botany of the Rocky Mountain Region. Ameri- 

 can Book Company. 



Coulter, Manual of the Phanerogams and Pteridophytes of Western 

 Texas. V. S. Dept. Agric, 1892. 



Gray, Synoptical Flora of North America. (In progress.) 



Gray's Manual is commonly bound with the " Lessons " in one 

 volume, but may be had separate in convenient form for the 

 pocket. Dr. Gray's final revision of the " Lessons " has been pub- 

 lished under the title, . Elements of Botany. American Book 

 Company. 



CEYPTOGAMIC BOTANY. 



Eaton, Ferns of North America. Cassino, Boston, 1879. 



Lesquereux and James, Mosses of North America. Cassino, Boston, 



1884. 

 Earlow, Marine Algce of New England. U. S. Fish Commission, 



Washington, 1881. 

 Tuckerman, North American Lichens. Cassino, Boston, 1882. 

 DeBary, Comparative Morphology and Biology of the Fungi, Mycetozoa, 



and Bacteria. Oxford, Clarendon Press, 1887. 

 V. Tavel, Vergleichende Morphologic der Pilze. Fischer, Jena, 1892. 

 Bennett and Murray, Handbook of Cryptogamic Botany. Longmans, 



Green & Co., London and New York, 1889. 

 Plowright, British Uredinece and Ustilaginece. Kegan Paul, Trench & 



Co., London, 1889. 

 Underwood, Our Native Ferns and their Allies. Henry Holt & Co., 



New York. 



The list of works on Cryptogamic Botany might be greatly 



extended. Numerous references to the literature of the algae 



