3G JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



In agris Japonicis et Koreanis colitur. 



Although Panax Ginseng C. A. Meyer is the best name for the Korean 

 Ginseng, P. schin-seng precedes it by ten years. Panax schin-seng has 

 three varieties of which two belong really to two distinct species. When 

 a species is subdivided into varieties by an author such as a, b, c or 1, 2, 3 

 or giving names of their own and the co-ordinate descriptions are followed 

 it is natural to adopt the first variety for the type. Panax schin-seng is 

 one of these cases and moreover it is furnished with colored plates which 

 no one can mistake for any other species. This is the reason why the name 

 Panax schin-seng is adopted here. 



The author started this investigation at the Tokyo Imperial University 

 and finished it at the Arnold Arboretum of Harvard University. He wishes 

 to express his great appreciation of Professor Sargent's courtesy in allowing 

 him to avail himself freely of the library and the herbarium of that institu- 

 tion. The author wishes also to thank Mr. E. H. Wilson for useful help 

 and to Miss Tucker for her courteous assistance in the library. And he 

 wishes especially to emphasize his sense of gratitude toward Mr. Rehder 

 for his valuable criticisms and suggestions. 



EHRETIAE QUAEDAM NOV^E ASIATICAE 



T. Nakai 



(iris 



The Chinese specimens [of Ehretia acuminata] agree well with Ben- 

 tham's full description of Brown \s species, and in the absence of Australian 

 material of the typical plant there is nothing to be done but to follow 

 Clarke and others in referring the Asiatic plant to Brown \s species. Never- 

 theless, I am sceptical as to the two being conspecific, since such distri- 

 bution is contrary to all we know of Chinese woody plants." 



This is a note by Mr. E. II. Wilson when he enumerated the Chinese 

 Ehretia in Sargent's Plantae Wilsonianae. Agreeing in this opinion I have 

 lately studied all the material of Ehretia acuminata and of the allied species 

 in the Arnold Arboretum Herbarium. Fortunately I have been able to 

 see both flowering and fruiting specimens of Ehretia acuminata from 

 Australia and of the related species. They are indeed closely related but 

 have some remarkable distinctive characters. The most important 

 character distinguishing E. acuminata from allied species is the shape of 

 the anthers. In E. acuminata they are roundish and the connective is 

 not produced while in the other species they are oblong and the connective 

 exceeds the anther-tips. Next to the shape of the anthers, the pubescence 

 and the persistence of the leaves, the color and nature of the fruits are 

 prominent characters of the group. According to these characters the 



species may be distinguished as follows: — 

 Folia subtus pubescentia vel pilosa. 



Folia supra glabra, subtus pubescentia, ovata vel ovato-rotundata, remote et 

 minute serrulata, basi rotundata. Fructus maturi rubri E. pilosula. 



