ORCHIDACE^E 



be added Coryanthes and Corysanthes, genera of the Orchidaceae 

 which are retained notwithstanding a perplexing similarity in 

 their spelling. According to this recommendation it might be 

 supposed that the point could be stretched so that Adenostylis 

 (1825) should yield to Adenostyles (1816), and that Zeuxine, 

 a generic name now preferred by authors for the species of Ade- 

 nostylis, should be kept in force, but in view of the very clear 

 and precise wording of Article 57 of the Vienna Code and the 

 examples given, it would seem that personal preference has 

 no weight in choosing the best course to follow, and that Adeno- 

 stylis, which differs from Adenostyles in its termination only, 

 must stand. Article 57 is here given in full : 



Art. 57. The original spelling of a name must be retained except 

 in case of a typographic or orthographic error. When the dif- 

 ference between two names, especially two generic names, lies in 

 the termination, these are to be regarded as distinct even though 

 differing by one letter only. 1 



Examples: Rubia and Rubus, Monoch&te and Monoch&tum, 

 Peponia and Peponium, Iria and Iris. 



Reco mmendations. 



xxx. The liberty of making orthographic corrections must be 

 used with reserve, especially if the change affects the first syllable, 

 and above all the first letter of a name. 



xxxi. Many names differ by a single letter without risk of 

 confusion (ex. Durvillea and Urvillea). In cases where a close ap- 

 proach to identity is a source of error (Astrostemma and Aster- 

 ostemma in one and the same family, Asclepiadaceae, Pleuripeta- 

 lum and Pleuropetalum in Orchidaceee), only one, the older, 

 of the names should be kept, in accordance with Article 51, 4°. 



1 Italics are mine. 



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