220 Rhodora [NOVEMBER 
treme. There is a key to the 17 sections of the subgenus with page 
references to sectional keys, which are introduced at the appropriate 
places in the text. In addition, there is an artificial key to the whole 
subgenus, in which the species are not retained in taxonomic sequence. 
The authors have followed the “ American”’ code of nomenclature. 
In a few cases specific names are used which would not be authorized 
by the Vienna Code. An interesting example is that of Panicum poly- 
anthes, a name justified by the “American” rules but not by the 
Vienna rules (although it has crept into Gray’s Manual, ed. 7!) The 
_ valid name is Panicum multiflorum Ell. 1816< Panicum multiflorum 
Poir. 1816 is P. dichotomiflorum Mx. 
Hitchcock and Chase have given us a book of enduring worth,— 
a book which it is a pleasure to own and which it will be a greater 
pleasure to use—H. H. Barrierr, Bureau of Plant Industry, 
Washington, D. C. 
Vol. 12, no. 142, including pages 193 to 208, was issued 1 November, 1910. 
