Format 



The format of this checklist is similar to but deviates somewhat from that 

 of the /. opaca checklist (Eisenbeiss and Dudley 1973). References to 

 documented nomenclature of infraspecific botanical taxa, which are more 

 numerous within /. crenata than within /. opaca, have been added. These 

 references are cited first, the dates indicating the first publication of the 

 names; but the publication dates may not represent the dates the plants 

 were introduced into cultivation. The objective is to establish the first use 

 of the basionym. Also, the reasons for names being regarded as 

 illegitimate are usually stated. However, illegitimacy because the name 

 lacks a plant description or is in Latin form (for those names published on 

 or after January 1, 1959) or because of names in synonymy is so frequent 

 that these causes are not always stated. Names that are illegitimate because 

 of one of these causes are easily recognized by their publication date. 



A cultivar can have only one legitimate name, and a legitimate name can 

 apply to only one cultivar (clone). 



Information for each name entry is given according to the following 

 format: 



• All names, regardless of rank, are enumerated in alphabetical order. 



• Homonyms are listed in alphabetical order by the personal name of 

 the publishing authority or by the name of the nursery. 



• The earliest published reference found for a name is given first and 

 placed in parentheses. Within the parentheses, those references 

 lacking a plant description are identified. 



• Additional references are included when they provide important 

 supplemental information. 



• Information from included references is preceded by a dash after the 

 reference. Information and comments derived from the authors of 

 this checklist and previously unpublished sources is contained in 

 brackets or stands alone in separate sentences. 



• Descriptive information is presented in the following order: habit, 

 leaf characters, and fruit characters, and miscellaneous data such as 

 origin and hardiness. When available, the sources, discoverers, 

 selectors, and introducers, with pertinent dates, are also included. 



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