﻿ON THE BOTANY OF JAPAN. 393 



Viburnum Opultis was detected in the northern island: this species extends all 

 round the world in the cooler latitudes. V. pUcatum, Thunb., I have elsewhere iden- 

 tified with V. latitanoides, Michx., which is peculiar to the cool, moist woods of Canada 

 and of the Xorthem United States, not extending westward beyond the Great Lakes. 

 This and the last species, as well as others, have good stipules. V. tomeutosuj/i, Thunb., 

 which, in Perry's Expedition, I referred, without sufficient reason, to the preceding spe- 

 cies, I now suspect to be a radiate variety of Thunberg's V. dilatatum. This Mr. 

 Wright collected abundantly, but uniformly rayless; the leaves much like those of 

 V. Lantaua of Europe, only not at all cordate, and more downy beneath. A less 

 downy state of V. dilatatum (var. nudiusculum) is the V. erosum of De Candolle, Zuc- 

 carini, and of my enumeration of Drs. Williams and Morrow's collection, clearly pass- 

 ing into the former species on the one hand, and on the other perhaps not distinct 

 enough from the genuine V. erosum of Thunberg. The latter, however, which was 

 abundantly gathered near Hakodadi (while the variety of V. dilatatu7n came from 

 Simoda), appears to be distinguished by its general smoothness, its thin leaves more 

 coarsely toothed and conspicuously acuminated, and its smaller and simpler, long- 

 peduncled cymes. I have seen no Japanese Viburnum answering to V. cordifolium. 

 Wall., said by Dr. Hooker to occur in Japan. Fragments of the Himalayan plant 

 most resemble V. plicatum. I cannot identify Thunberg's V. cuspidatum. 



Japanese specimens are quite intermediate between the Sambucus racemosa of the 

 Old World, and the North American S. pubens. 



Rubiacea. The Asperula odorata was again collected, apparently indigenous ; also 

 Galium pauciflorum, Bunge, a mere variety of G. Aparine ; G. verum, var. lasiocarpum ; 

 and G. triforum, exactly like North American, Russian, and Scandinavian specimens. 

 The species is not recorded from Xorthem Asia ; and Dr. Hooker's Himalayan plant 

 of the name slightly differs. My G. trachyspermum was gathered in better specimens 

 (as also from Loo Choo), and with two marked varieties.* The only other addition 

 to the Japanese Flora in this order is a dwarf and fleshy variety of Oldenlandia pani- 

 culata, from the southern extremity of Kiu-siu, also from Loo Choo.f 



* Galioi trachtspeejium, Graj, in PeTTt^s Jap. Exped. 2, p. 313. G. rotundum (rotundifolium), Thunb. 



Var. GRACILEXS : foliis lanceolatis ; pedicellis gracilioribus ; floribus parvis. Simoda. 



Var. SETULIFLOROI : foliis ovalibus oblongis lanceolatisve ; corolla extus parce hispida. Simoda, Agenhu. 



t The following are new Ruhiacecs from the Bonin collection : — 



PsTCHOTBiA HOMALOSPEEMA (sp. nov.) : arborescens, glaberrima ; stipulis brevibus latis basi excepts 

 caducis ; foliis obovatis seu oborato-oblongis breviter acuminatis basi in petiolam longiusculum angustatis 

 opacis ; pedimculo terminali nunc sublaterali ancipiti foliis dimidio breviores ; cyma laxiflora ; floribus fructi- 



