1919] 



WILSON, THE BONIN ISLANDS 



107 



strange that a plant so abundant from Japan to Formosa and through China 

 should be so rare in the Bonins. The Elaeagnus is perhaps the largest of 

 the Benin climbers and finds its way to the tops of the tallest trees, from 

 which its rope-like stems hang down. It is near Elaeagnus macrophylla 

 Thunb. and is an autumn-flowering species. I could find neither flower nor 

 fruit. The Trachelospermum has relatively large, inodorous flowers, and in 

 late April and May is singularly attractive and conspicuous on rocks, tree- 

 trunks and shrubs in sunny places. On the seashore the cosmopolitan 

 Ipomaea hiloha L. is common with its string-like stems firmly anchored at 

 and above tide-mark. The climbing Argyreia tiliaefolia Wight grows only 

 near habitations and was undoubtedly introduced from Hawaii. Lastly 

 the Psychotria with its leaves much broader than that of the wide-spread 

 type, grows on rocks and tree-trunks in the forests although it cannot be 

 described as common. 



SHRUBS 



Piper Postelsianum Maxim. 

 Boehmcria boninensis Nakai 

 Procris laevigata Bl. 

 Pseudixus japonicus Hay. 

 Bryophyllum calycinum Salisb. 

 Pittosporum boninensis Koidz. 

 Osteomeles anthvllidifolia Lindl, 

 Rubus Nishimuranus Koidz. 

 Caesalpinia bonducella Flem. 

 Lespcdeza striata Hook. & Am, 

 Leucaena glawca Benth. 

 Mimosa pudica L. 

 Rh;^aK'hosia minima DC. 



Melastoma sp. 



Vaccinium bracteatum var. 



Wrightii Rehd. & Wils. 

 Statice arbiiscula Spr. 

 Symplocos Otomoi Rehd. & Wils 

 Ligustrum japonicum Thunb. 

 Osmanthus insularis Koidz. 

 Geniostoma glabra Matsum. 

 Vinca rosea L. 

 Asclepias eurassivica L. 

 Touruefortia argentea Linn. f. 

 Callicarpa glabra Koidz. 

 Callicarpa Nishimurae Koidz. 



Evodia Kumagaiana Rehd. & Wils. Vitex ovata Thunb. 



Zanthoxvlum Arnottianum Maxim. 

 Phyllanthns Niruri L. 



Ilex Matanoana ^lak. 

 Ilex Mertensii Maxim. 

 Evonymus boninensis Koidz. 

 Dodonaea viscosa Jacq. 

 Triumfetta subpalrnata Soland. 

 Malvastrum tricuspidatnm.A. Gray 

 Sida rhombifolia L. 

 Eurva boninensis Koidz. 

 Stachyurus macrocarpus Koidz. 

 Wikstroemia pseudoretusa Koidz. 

 Eugenia boninensis Koidz. 

 Eugenia microphylla Abel 



Lycium sp. 



Myoporuni boninense Koidz. 



Gardenia angusta Merr, 



Morinda citrifoha L. 



Morinda unibellata L. 



Oldenlandia cordata Matsum. 



Oldenlandia Grayi K. Sch. 



Rubiacea 



Sambucus javanica BI. 



Viburnum japonicum var. bonin- 



simense Mak. 

 Lobelia boninensis Koidz. 

 Scaevola Koenigii Vahl 

 Cacalia crepidifoHa Nakai 



The 54 shrubby plants are distributed among 35 families and 50 genera; 

 24 species and one variety are endemic. The Bryophyllum, Leucaena, 

 Rhynchosia, Mimosa, Lespedeza, Phyllanthus, Triumfetta, Malvastrum, 

 Sida, Vinca and Asclepias are roadside weeds and very probably have been 

 quite recently introduced. I did not collect the Mimosa and Lespedeza. 



