Laws of Botanical Nomenclature. 69 
Art. 33. Names of persons used as specific names have a 
genitive or an adjective form (Clusii or Clusiana). The first 
is used when the species has been described or distinguishéd by 
the botanist whose name it takes; in other cases the second 
form is preferred. Whatever be the form chosen, every specific 
name derived from the name of a person should begin with a 
capital letter. 
Art. 34. A specific name may be an old generic name, or a 
substantive proper name, It then takes a capital, and does not 
agree with the generic name (Digitalis Septrum, Coronilla 
8). 
Art. 35. No two species of the same genus can bear the 
same specific name, but the same specific name may be given in 
several genera, 
Art. 36. In constructing specific names, botanists will do 
well to give attention to the following recommendations :— 
(1.) Avoid very long names, as well as those that are difficult 
to articulate. 
(2.) Avoid names that express a character common to all, 
or to almost all the species of a genus. 
(3.) Avoid names designating little known or very limited 
localities, unless the species be very local. 
(4) Avoid, in the same genus, names too similar in form,— 
above all, those that only differ in their last letters. 
(5.) Readily adopt unpublished names found in travellers’ 
pegs in herbaria, unless they be more or less defective (see 
(6.) Avoid names that have been already used in the genus, 
or in some nearly allied genus, and have become synonyms. 
-) Name no species after any one who has neither discov- 
ered, nor described, nor figured, nor studied it in any way. 
(8.) Avoid specific names composed of two words. 
(9.) Avoid specific names having, etymologically, the same 
meaning as the generic name. : 3 
Art. 37, rids whose origin has been experimentally de- 
Monstrated are designated by the generic name, to which is 
added a combination of the specific names of the two species 
from which they are derived, the name of the species that has 
supplied the pollen being placed first with the final 7 or o, and 
that of the species that has supplied the ovulum coming next, 
with a hyphen between (Amaryllis vittato-regine, for the 
tyllis proceeding from A. reginc, fertilized by A. vittata. 
Hybrids of doubtful origin are named in the same manner 
48 species. They are distinguished by the absence of a number, 
and by the sign x being prefixed to the generic name (X Salix 
Capreola, Kern.). 
