﻿386 ON THE BOTANY OF JAPAN. 



In the well-known Wistaria Sinensis, which grows wild as far north as Hakodadi, 

 we have a strict representative of W. f)-utescens of the United States east of the ]\Iis- 

 sissippi; while MiUetia Jajyonica (^Wistaria Jajwnica, Sieb. & Zucc), found on Kiu-siu, 

 belongs to a more southern Asiatic type.* 



None of the Japanese Lespedezce were met with in this expedition. They are of 

 the Siberian and Chinese, rather than of the Eastern American type ; and the genus 

 is absent from Western Xorth America, as likewise is Desmodium, so abundant in the 

 Atlantic United States, and with one species said to inhabit Japan. 



Sophora Japonica is closely related to S. affinis of Texas, and to no other known 

 species. I have not seen S. angiistifolia, Sieb. & Zucc, to compare it with the Siberian 

 S. flavescens and ^Sl alopecuroides on the one hand, and on the other with S. sericea of 

 our high "Western plains. 



Rosace(e are much more numerous than Leguminous plants in Japan. Prunus 

 Miime is probably the same as P. Sibirica, and too near the common Apricot. P. 

 Pseudo-Cerasus, Lindl., is the representative of the Himalayan P. Puddum. and the 

 European P. Cerasus. Imperfect specimens from Hakodadi belong either to the 

 American P. Virginiana, or to P. Pad us, which extends through nearly the whole 

 breadth of the Old "World. Not having well-formed fruit, I cannot tell whether the 

 fruit is rugose, as in the latter, or smooth, as in the former. P. spinidosa represents, in 

 a general way, our P. CaroUniana and the P. Lauro-Cerasus of Europe. 



Of Spircea, the present collection comprises S. hetulcefolia, Pall., which extends from 

 Eastern Siberia through Oregon to the eastern base of the Rocky Mountains, and then 

 (under the name of S^. cori/mbosa, Raf.) reappears in the Alleghanies of Virginia; S. 

 pahnata of Thunberg, which is very likely to prove the S. palmata of Pallas also 

 (which is very close to the Alleghanian S. lohata), and is certainly only a glabrate 

 form of S. Kamtscliatica ; and S. Aruncus. The latter extends through the Old World, 

 but is rare in Western Europe, and through the Russian American Islands and Oregon, 

 to the Alleghanies and their northern prolongation. Its petals are convolute in aesti- 

 vation. No doubt S. salicifolia grows in Northern Japan, as well as on the adjacent 

 mainland ; this also extends through Asia and crosses the eastern borders of Europe, 

 and reappears in the eastern part of North America, while wanting in the western. 

 But it is replaced in Oregon by S. Menziesii. 



* Through some oversight, Bentham, in Plantse Jvmghuhnianse, p. 249, adn., has enumerated Wistaria 

 Chinensis as a Millettia. But W. Japonica must have been the species intended, as this is truly a Millettia, 

 while the other is not. 



