NONATELIA 453 



A group of any rank can bear only one valid name the oldest. But 

 to apply this rule rigidly would allow almost no fixity. For flowering 

 plants and ferns it is therefore agreed to go hack only to the first 

 edition (t/53) of Linnaeus' Species Plant arum, and the descriptions in 

 his Genera Plantarum, edit. 5, 1754. Further, there are a large 

 number of genera whose current names are not the oldest, but are so 

 familiar that a change would cause confusion, so that it has been 

 agreed, for instance, that IVehvitschia shall retain that name and not 

 be termed Tumboa, though the latter was first bestowed, and the 

 same in a great number of other instances. 



When a name given to a genus by a pre-Linnean author is taken 

 over by Linnaeus or a subsequent author, it is thus indicated : 



Mercurialis (Tourn. ) L. (named by T., accepted by L.). 



When a name was given, but not published, by a botanist, and 

 subsequently published by another, it is shown thus : 



Leersia Soland. ex Sw. (given by Solander, in MS., and published 

 by Swartz). 



When a name is published by a man writing in someone else's 

 publication, it is indicated by 'in,' e.g. L. C. Rich, in Michx. means 

 given by Richard in Michaux's Flora. 



When a sp. is transferred from one gen. to another, it retains its 

 specific name if possible (i.e. usu. if the new gen. does not already 

 contain a sp. with the same name), and the author of the first may 

 be indicated in brackets, e.g. Cheiranthns tristis L. may become 

 Matthiola tristis (L.). 



Genera and species that are merged in others become synonyms, 

 of which there are vast numbers. This book contains very many 

 generic synonyms, indicated thus : 



Acrocarpidium Miq. = Peperomia Ruiz et Pav. 



But a synonym may at any time be revived, so that it is not 

 customary to use names from the list of synonyms to designate new 

 gen. or sp. 



When a genus is merged in another, the fact is often signified by 

 the letters p.p. (pro parte], to indicate that it only forms a portion of 

 the larger genus, often a subgenus or a section. 



The symbol x is used to designate a hybrid (cross of two species) 

 or mule (cross of two divisions of one sp.). 



Generic and specific names as published are collected in the Kew 

 Index, to which a supplement is published every 5 years. At first 

 the names were divided into valid and synonyms, but now all are 

 published without any editorial expression of opinion. In de Dalla 

 Torre and Ha-rms' Genera Siphonogamarum is a list of generic names 

 and synonyms pretty much as accepted by Engler. In this book 

 I have placed all genera as accepted by Linnaeus, Bentham-Hooker, 

 or Engler-Prantl, and all subsequent genera, whether usu. considered 

 synonyms or not. 



For details see Briquet, Regies Internationales de la nomenclature 

 botanique, Jena, 1912; Asa Gray, Structural Botany, ch. X. 

 Nomocharis Franch. Liliaceae (v). i Yunnan. 

 Non-articulate, not cut off by an absciss-layer. 

 Nonatelia Aubl. = Palicourea Aubl. (Rubi. ). 



