NOMENCLATURE 259 
Tragus (1768) to be used instead of Nazia (1763). 
Leersia (1788) to be used instead of Homalocenchrus (1760). 
Hierochloé (1810) to be used instead of Savastana (1799). 
Cynodon (1805) to be used instead of Capriola (1763). 
Ctenium (1814) to be used instead of Campulosus (1810). 
Buchloé (1859) to be used instead of Bulbilis (1819). 
Lamarckia (1794) to be used instead of Achyrodes (1760). 
Glyceria (1810) to be used instead of Panicularia (1763). 
Article 50, requires the use of 
Setaria Beauv. 1807, not Ach. 1798, nor Michx. 1803, instead 
of Chztochloa Scribn. 1897. 
Digitaria Hall. 1768, not Heist. 1768, instead of Syntherisma 
Walt. 1788. 
284. American code.—‘‘The American Code of Botani- 
cal Nomenclature” was prepared by a Nomenclature 
Commission of the Botanical Club of the American Asso- 
ciation for the Advancement of Science. The latest revis- 
ion of this code was made in 1907. (See Bull. Torrey Club 
34: 167-178. 1907.) Although this code has been adopted 
by neither the Botanical Club nor the American Associa- 
tion, and has no official standing, it is followed more or 
less closely by many American botanists. Some of its 
important provisions are given for comparison. 
Botanical nomenclature is treated as beginning with the general 
_ application of binomial names of plants (Linnzus’ ‘Species Plan- 
tarum,” 1753). (Principle 2.) 
The application of a name is determined by its reference to a 
nomenclatorial type. (Principle 4.) 
In the transfer of a species from one genus to another, the orig- 
inal specific name is retained, unless the resulting binomial has been 
previously published. (Canon 9.) 
The nomenclatorial type of a species or subspecies is the speci- 
men to which the describer originally applied the name in publica- 
tion. (Canon 14.) 
The nomenclatorial type of a genus or subgenus is the species 
originally named or designated by the author of the name. If no 
