146 THE BOTANICAL MAGAZINE. LVoi. xxxiv. No. 406. 



my Bonin-trips and made me pleasant and successful. 



523) Stachyurus Matsuzakii, Nakai sp. nov. 



Circ. 15 metralis alta, trunco diametro 15 cm. ramosa. Ramus 

 annotinus badus lucidus lenticellis punctatus. Folia chartacea supra 

 luciduscula distincta subincurvato-serrata elliptica basi acuta apice 

 acuminata glabra infra pallida venis elevatis, petiolis 4—5 cm. longis, 

 laminis 10-12 cm. longis. Spica robusta pendula. Sepala squamosa. 

 Petala flava 5-7 mm. longa. Fructus 4-locularis lucidus obovato- 

 oblongus apice mucronatus praster acumine 13-15 mm. longus. 



Nom. Jap. Hachijo-kifuji. 



Hab. 

 Hondo : in rupibus secus torrentem insular Hachijo prov. Idzu (T. 



Nakai et Naoe Matsuzaki). in insula Oshima prov. Idzu (Saburo 



Okubo). 



A very distinct species with its robust twigs, large and coarsely 

 serrated thick leaves and big obovate fruits. A flowering specimen 

 collected by the late Mr. Saburo Okubo, the former assistant pro- 

 fessor in Botany of the Imperial University of Tokyo, is kept in our 

 Herbarium. It has robust twigs and stouter spikes, and at once 

 recognisable to be identical with our species. 



The volcanic chain of the m't Fuji runs southward to the Sul- 

 pher-Islands intercalating many small islets like Izu-Oshima, Niijima, 

 Miyakejima, Hachijo, Aogashitna, Torishima etc., etc. The Torishima 

 islet is situated between the Bonins and Aogashima. It has erupted 

 some twenty years ago and the whole islet was covered by the 

 eruptives, thus killing the plants and even the inhabitants. The new 

 vegetation as well as the former one is still unknown to us. The 

 Aogashima islet, the next northern one, also erupted about 40 years 

 ago, but now is covered by the shrubberies consisting of Hibiscus, 

 Elaeagnus, Hydrangea, Machilus, Euonymus etc. Its vegetation is 

 very probably the southernmost limit of the Japanese one. Eliminat- 

 ing these two islets, the northern chain beginning from Oshima and 

 ending southward to Hachijo is of the older formation and has their 

 own particular elements like Hydrangea hortensis, Viburnum brachy- 

 andrum, Rubus ribisoides, C&rex ohsimensis, Euphrasia hachifoensis, 

 Astilbe hachifoensis, Prunus Lannesiana f. albida, Campanula micro- 

 donta etc. The present species is also particular to the chain where 

 neither the Japanese Stachyurus nor the Bonin one are there. I have 

 named after the family name of Mr. Naoe Matsuzaki, the second 

 curator of our botanical garden, who went there with me this June. 



