40 Rhodora [Marcu 
becomes a connecting vowel, in latin 7, in greek o; thus we write menthijolia, : 
salviifolia, not menthaejolia, salviaejolia. When the second root begins with 
a vowel and euphony demands, the connecting vowel is eliminated (e. g. 
calliantha, lepidantha). The connecting ae is legitimate only when etymology 
demands (e. g. caricaeformis from Carica, may be retained along with carici- 
jormis from Carex). 
XIV. In forming specific names, botanists will do well to note the following 
recommendations: 
a) Avoid very long names and those which are difficult to pronounce. 
b) Avoid names which express a character common to all or nearly all the 
species of a genus. 
c) Avoid names taken from little known or very restricted localities, unless 
the species be very local. 
d) Avoid, in the same genus, names which are very much alike, especially 
those which differ only in their last letters. 
e) Adopt unpublished names found in travellers’ notes and herbaria, 
attributing them to the authors concerned, only when those concerned have 
approved the publication. 
f) Avoid names which have been used before in the genus, or in any closely 
allied genus, and which have lapsed into synonymy (homonyms). 
g) Do not name a species after a person who has neither discovered, nor 
described, nor figured, nor in any way studied it. 
h) Avoid specific names formed of two words. 
i) Avoid names which have the same meaning as the generic name. 
Art. 27. Two species of the same genus cannot bear the same 
specific name, but the same specific name may be given in several 
genera. 
Example: Arabis spathulata DC. and Lepidium spathulatum Phil. are valid 
as two names of Crucifers; but Arabis spathulata Nutt. in Torr. and Gray 
cannot be maintained, on account of the existence of Arabis spathulata DC., 
a name previously given to another valid species of Arabis. 
Art. 28. Names of subspecies and varieties are formed like 
specifie names and follow them in order, beginning with those of the 
highest rank. The same holds for subvarieties, forms, and slight 
or transient modifications of wild plants which receive a name or 
numbers or letters to facilitate their arrangement. Use of a binary 
nomenclature for subdivisions of species is not admissible. 
Examples: Andropogon ternatus subsp. macrothrix (not Andropogon macro- 
thrix or Andropogon ternatus subsp. A. macrothrix); Herniaria hirsuta var. 
diandra (not Herniaria diandra or Herniaria hirsuta var. H. diandra); forma 
nanus, forma maculatum. 
Recommendation. 
XV. Recommendations made for specific names apply equally to names 
of subdivisions of species. These agree with the generic name when they 
have an adjectival form (Thymus Serpyllum var. angustifolius, Ranunculus 
acris subsp. F'riesianus). 
Art. 29. Two subspecies of the same species cannot have the same 
name. A given name can only be used once for a variety of a given 
