lis JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



considering Calpidia Du Petit-Thonars a distinct genus, we liave to refer 

 Koidzunii's species which is apparently very near C. cxcelsa (Bl.) Ileimerl 

 to that genus. 



Evodia Kumagaiana, sp. nov. — Erodia triphylla Ilattori in Jour. Coll. 

 Sci. Tokyo, xxiii. art. 10, 28 (1908), non De Candolle. 



Frutex 2 4-metralis, ramosissiinus, glaber, ramis crassis subtcrctibus, 

 cortice lacvi rubro brunneo striis pallide cinereis notato, ligno denso. Folia 

 trifoliolata, coriacea, persistentia; foliola petiolulata petiolulis O.o-^.o cm. 

 longis, medio lateralibus pauUo longiore, supra canaliculatis, obovata vel 

 elliptica vel oblongo-obovata, apice rotundata et saepissime emarginata, 

 basi cuueata et saepe obli(iua, 3-10, pleraque 6-9 cm. longa, et 1.5-4. .5 cm. 

 lata, Integra, supra luteo-viridia, lucida, subtus opaca, minute glanduloso- 

 punctulata, nervis utrinsecus 7 10 sub angulo fere recto divergcntibus; 

 petioli 2 7 cm. longi, subteretes. Inflorescentia axillaris, paniculata, 

 pedunculo crasso 0.5-2 cm. longo glabrescenti incluso 2 cm. longa et 

 2 3 cm. lata, axibus crassiusculis floribusque tomeuto velutino brevi 

 cinereo-flavescenteobtectis; flores 4-meri, unisexuales, albltli, circiter 5 mm. 

 diam., brevi.ssime pedicellati, bracteis bracteolisque triangularil>us acutius- 

 culis minutis suffulti. Flores ma.sculi: sepala semiorbicularia. 1 mm. longa 

 et 1.5 mm. lata, basi decurrentia; petala patentia, ovata, 3 mm. longa, 



acutiuseula, extus velutina, intus fere glabra, glanduloso-punctulata; 



stamina erecta, petala aequantia, filamentis subulatis glal)ris, antheris sub- 

 globosis; rudimentum ovarii dense tomeuto velutino fusco-flavescenti 

 obtectum. Flores feminei (deflorati tantum visi) similes, sed .sepala ovata, 

 acutiuseula, vix 1 mm. longa et paullo angustioribus; staminodia pistillum 

 supcrantia, antheris stcrllibus; pistillum dense velutimnn, stylo brevi 

 piloso, stigmate capitato. Fructus desideratur. 



BoNiN Islands: Aui-jima, thickots.alt. 100-200 ui.. Miiy 3, 1917, E. II. Wihon 

 (No. 8370). 



This species belongs to the section Lepta, subsect. Trifoliolatae Engl, 

 and has been confused by Japanese botanists with E. friphi/lla De Candolle 

 which, however, is easily distinguished by its thin acuminate leaves and 

 glabrous ovary; from the species with coriaceous leaflets known to us, as 

 E. acuminata Merrill, E. hcngudensis Elmer, E. Kingil Engler, E. j>nchy- 

 phijUa King, E. retusa Merrill and E. rohusta Hooker f., it differs in its 

 emarginale leaflets, small paniculate inflorescence, velutinous petals and 



in its densely tomentose ovary. 



Evodia Kumagaiana is fairly common on Ani-jima, but I did not see 

 it elsewhere. It is named for Mr. Y. Kumagai, Okitsu Exi)erimental Sta- 

 tion, Shizuoka-ken, who was detailed by the Japanese Government to ac- 

 company mc to the Bonin Islands, in appreciation of many valued services. 



merme 



E. TI. W. 



Xan- 



Zanthcxylum ailanthoides Sicb. & Zucc. var. 

 thoxyhim ailanthoides Hattori in Jour. Coll Sci. Tokyo, xxiii. art. 10, 28 

 (1908), non Siebold & Zuccarini. 



