262 A TEXT-BOOK OF GRASSES 
occasionally used by amateur botanists, but scarcely by 
the general public. 
LIST OF BOOKS AND ARTICLES RELATING TO 
TAXONOMIC AGROSTOLOGY 
From the large number of works on this subject a few 
of the recent more important and accessible are here 
indicated. Appended to the main list which deals with 
North American agrostology is a brief list of representative 
reference works upon the grasses of foreign countries. 
Works relating to genera 
al 
Bentham & Hooker, Genera Plantarum, 3, part 2, 1883. 
Durand, Index Generum Phanerogamorum, 1888. A systematic 
index to Bentham & Hooker’s Genera Plantarum. 
Engler & Prantl, Pflanzenfamilien. Graminee by Hackel, II, 2. 
1887. There are additions by Hackel and by Pilger. 
Dalla Torre & Harms, Genera Siphonogamarum, 1900-1907. A 
systematic index to Engler & Prantl’s Pflanzenfamilien. 
Hackel, True Grasses, 1890. Translated from the preceding, by 
Scribner & Southworth. 
Scribner, American Grasses, III, Descriptions of the tribes and 
genera. (U.S. Dept. Agr. Div. Agrost. Bull. 20. 1900.) 
Chase, Notes on Genera of Panicez. (In four parts, Proc. Biol. Soe. 
Washington. I. 19: 183-192. 1906. II.21:1-10. 1908. III. 
21:175-188. 1908. IV. 24:103-160. 1911). 
Manuals and floras 
North American Flora. Poacee by Nash (17: 77-98. 1909; 99-196. 
1912). Descriptions. 
Beal, Grasses of North America. I. 1887. ITI. 1896 (systematic por- 
tion). Descriptions. 
Bailey, Cyclopedia of American Agriculture, 2: 365-376. 1907. 
Grasses by Hitchcock. 
