LAWS OP NOMENCLATURE. 27 



Art. 33. Names of persons used as specific names 

 have a genitive or an adjective form (Chsii or Ciu' 

 siana). The first is used when the species has been 

 described or distinguished by the botanist whose 

 name it takes ; in other cases the second form is pre- 

 ferred. 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 Sceptrum, Coronilla Emerus). 



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 recom- 

 mendations : — 



(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.) Eeadily adopt unpublished names found in tra- 

 vellers' notes or in herbaria, unless they be more or 

 less defective (see Art. 17). 



(6.) Avoid names that have been already used in the 

 genus, or in some nearly allied genus, and have be- 

 come synonyms. 



