1919] WILSON, THE BOXIN ISLANDS 119 



A typo recedit defectu aculearum, omnibus partibus plantae aculeis 

 omnino dcstitutis. 



BoNix Islands: Haha-jima, woods and thickets, alt. 100-400 m., April 29, 

 1917, E, IL Wilson (No. 82G5, type; tree 8-16 m. tall; leaves and old fruits); 

 Chiclii-jima, without precise locality //. Otomo (flowers). 



By Japanese botanists this tree has been referred to Zanthoxylum ailan- 

 thoides Sieb. & Zucc. which, however, is easily distinguished from it by the 

 prickles on the trunk, the branches, and often on the leaf-rhachis. The 

 Bonin form Is without prickles on any of its parts, but In all other characters 

 it agrees perfectly with the typical form as we know it from Japan and 

 Korea, It is common on all the larger islands and emits a very strong rue- 

 like odor. The Bonin Islanders call it Poison-w^ood tree and use its w^ood 

 in making the hulls of their canoes. 



Symplocos Otomoi, sp. nov. 



Frutex glaberrimus, sepaHs et petalis ciliolatis exceptis; rami juniores 

 crassluscull alato-angulati, flavldi, vetustiores acute angulati. Folia crasse 

 coriacea, ad tertium annum persistentia, breviter petiolata, elliptica vel 

 ovato-ellii)tica, apice rotundata vel retusa, basi late euneata, 2-4 cm. longa 

 et 1-2.5 cm. lata, margine Integra, valde revoluta, supra laete luteo-viridia, 

 nitentia, rugosa, subtus pallidiora, costa supra Impressa, subtus elevata, 

 nervis utrinsecusclrciter 6, supra impressis, subtus obsoletis; petloli 2.5 cm. 

 longi. alati. Flores 0.8-1 cm. diam., subsessiles, in racemis axillaribus vix 

 1 cm, longis densis circiter 5-floris; bracteae ovatae, 1.5-3 mm. longae; 

 calyx 3-3.5 cm. longus, lobis late ovatis vel semiorbicularlbus rotundatis 

 circiter 2 mm. longis et latis ciliolatis in tubum brevem vix aequilongum 

 connatis; petala calycem duplo superantia, elliptica, leviter concava, 

 obtusa, 5-6 mm. longa et 3-3.5 mm., lata, ciliolata; stamina manifeste penta- 

 deli)hica, circiter 75, longiora petala subaequantia, filamentis filiformibus 

 glabris, antheris suborbicularibus; stylus brevis, 1.5 mm. longus, glaber, 

 sulcatus, stigmatibus 3 parvis leviter divergentibus; ovarium triloculare, 

 apice leviter pubesccns. 



Boxix Islands: Chichi-j ima, without precise locality, //. Otomo. 



A very distinct species characterized by Its small crow^ded rugose obtuse 

 or emarginate leaves and w*inged shoots. It seems most closely related to 

 S. crassifolia Bcnth. and to S. lucida Sieb. & Zucc, but these are both easily 

 distinguished by the acute or acuminate leaves smooth above, serrate in 

 S, lucida, and by the stamens exceeding the petals and fewer, 30-00, in 

 number, and by the less winged shoots. 



I take pleasure in associating this new^ species with Mr. Ilidemasa Otomo, 

 Forestry officer for the Bonin Islands, to w^hom I am indebted for the speci- 

 men and whose knowdedge of the flora and energetic help did so much 

 toward making my visit to the Bonin Islands a pleasant and successful one, 



E. H. W. 



Symplocos boninensis, sp. nov. 



Arbor 3-6-metralis, trunco 0.3-0,5 m. circuitu, ramosissima, omnino 



