Rbodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 14. August, 1912. No. 164 
NOMENCLATORIAL CHANGES REQUIRED BY SOME 
GRAMINEAE OF THE SEVENTH EDITION 
OF GRAY'S MANUAL. 
F. Tracy HUBBARD. 
DvniNG my systematic studies in the Family Gramineae I have 
noted that several generic and specific names are used in the Seventh 
Edition of Gray's Manual, which do not conform to the International 
Rules for Botanical Nomenclature (“Vienna Code"). It is the aim 
of this paper to bring these observations before the users of the 
Manual. 
In most instances the defect arises from a violation of Sect. 7, Art. 
50 of the International Rules (* Vienna Code"), which states that a 
name shall not be rejected on account of the existence of an earlier 
homonym which is universally regarded as non-valid. "These names, 
taken up by Hitchcock in Gray's Manual, though contrary to the 
" Vienna Code," remain valid according to the American Code by 
Sect. V, Canon 16, which states without qualification that *a name is 
rejected when preoccupied (homonym)." This latter rule, while not 
without its defects, certainly tends toward a more stable nomenclature, 
and it seems a pity that it was not adopted at the Vienna Congress. 
Some of the untenable names in the Manual are changes from the 
.Sixth Edition, but the majority of them are those of species new to 
the Manual, which have been described by botanists using the Ameri- 
can Code and accepted without emendation in the preparation of 
the Seventh Edition. In two instances the change is necessitated by 
later knowledge regarding types. 
Naturally much of this paper is the result of compilation and of 
