•J04 JjU^zo IIayata 



X. The Bonin Islands (26°-28° N. Lat., 142"-143<^ E. Long ) 

 The flora of the ishmcls is of a semi-tropical character. Endeniic 

 elements are very many, as is usually the cace with an insular flora. 

 Tliey are represented by AlsophiJa JJongardiana Mett., Juniptrus 

 taxifolia PIook. et Arn., Pandanus honinensis Ware., Boninia glabra 

 Planch., Boninia grisa Planch., riatyplioUs honinsimae Maxim, and 

 many others. Boninia is an endemic genus helonging to the Rutaceae, 

 and Platypliolis is also endemic and even monotypic, belonging to the 

 Orobanchaceae. Livistona chinensis R. Br., Sideroxylon ferrugineum 

 H. et A., Ardisia Sieholdi Miq. and Mhaphiohpis ja,ponica S. et Z. 

 are trees common in the islands. 



XL The Micronesias under the Japanese mandatory rule. (0°-22° 

 N.Lat., 130°-173°E.Long ). 



The Micronesias under the Japanese rule include the Marshalls, 

 the Marianas (except Guam) and the Eastern and Western Carolines. 

 They number as many as seven hundred or more ; but all of them 

 being very small, their total area amounts to no more than 2780 sq. 

 km. The vegetation of the different islands is similar in many respects. 



On the shores we usually find PempMs acidula FoRsx, forming 

 dense littoral thickets and reaching down to the high-tide level, along 

 the lagoon side of the atolls. Scaevola frutescens and Tournefortia 

 argentea Ltnn. also grow on the shore. The former species fornjs 

 usually a very thick impenetra])le mass. Guettarda speciosa Linn., 

 Allophylus timorensis Bl. Morinda citrifolia Linn., Triumfetta procum- 

 hens FoRST and Barringfonia speciosa Forst are usually found mi.xed 

 in the littoral formations of Scaevola and Tournefortia. Coconut 

 palms and screw pines grow among the littoral bushes. 



Thick undergrowth consisting generally of Lepturus and Thuarea 

 is met with in the palm-forests. Allophylus timorensis Bl. and 

 Wedelia biflora P. DC. are the most common species and form a 

 dense growth in the interior of the islands. Terminalia Cattapa Linn., 

 Pipticrns incanus Wedd., Cordia szthcordata Lam., Ce^-hera lactaria Ham., 

 Hernandia peltata Meism., Callophyllum Inopliyllum Linn, and Ery- 

 thrina indica Lam. are usually found mixed in the beach formations. 

 Ipomaea pes-coprae Roth, predominates among the i)]ants found on 

 the sandy beaches. Generally speaking, the flora of the islands is 

 extremely po.r as far as the number of s])ecies is concerned. This 

 suggests that it is of comparativelv recent origin. 



