134 JOURNAL OF THE ARNOLD ARBORETUM [vol. vi 



Xanthophyllum palembanicum (non Miq.). If my identification of Mc- 

 Clure's specimen is correct, in view of Ridley's statement that Xanthophyl- 

 lum Maingayi Benn. is not specifically distinct from X. palembanicum, as 

 described by King and by himself, perhaps there is no need for the binomial 

 proposed by Dr. Chodat. In order to place the name Xanthophyllum 

 racemosum Chod., the following synonymy is given. 



Xanthophyllum racemosum Chodat apud Groff in Lingnaam Agric. 

 Review, n. pt. I. 26 (1924), nomen. 



Xanthophyllum palembanicum King in Jour. As. Soc. Bengal, lix. pt. n. 



137 (1890); Materials for a Flora of the Malayan Peninsula, i. 77 (1890). 



Ridley, Fl. Malay. Penin. i. 149 (1922).— Non Miquel. 

 Xanthophyllum Maingayi Benn. in Hook, f., Fl. Brit. Ind. 1: 210 (1874)? 



Gagnepain 1 confines Xanthophyllum palembanicum Miq. to Sumatra 

 and admits Xanthophyllum Maingayi Benn. as a valid species. It is inter- 

 esting to note that neither Xanthophyllum palembanicum as interpreted 

 by King and by Ridley, nor X. Maingayi Benn., which Ridley claims is 

 identical with X. palembanicum as interpreted by King, are recorded from 

 Indochina. In this connection it is suggested that perhaps the Hainan 

 form should be compared with Xanthophyllum colubrinum Gagnepain (in 

 Bull. Soc. Bot. France, lv. 35 [1909]; Lecomte, Fl. Gen. Indo-Chine, I. 

 244, t. 18 [1909] ). Flowering material from Hainan is desirable in order 

 to settle the exact status of the form that occurs in this island. 



EUPHORBIACEAE 



Drypetes Vahl 

 Drypetes hainanensis, sp. nov. (§ Sphragidia). 



Arbor parva, circiter 7 m. alta, fructibus exceptis (floribus ignotis) 

 glaberrima, ramis teretibus griseis, ramulis tenuibus, angulatis lenticel- 

 latis 1 ad 1.5 mm. diametro; foliis chartaceis oblongis integris, in sicco 

 olivaceis, utrinque concoloribus nitidis, distincte reticulatis, 6 ad 9 cm. 

 longis et 2 ad 3.5 cm. latis, utrinque angustatis, apice breviter obtuseque 

 acuminatis, basi distincte inaequilateralibus, acutis, nervis primariis utrin- 

 que circiter 10 distinctis anastomosantibus; petiolo circiter 8 mm. longo; 

 fructibus axillaribus solitariis vel binis sessilibus globosis 2 ad 2.5 cm. 



diametro fulvo-pulverulentis glabrescentibus, apice leviter umbilicatis, 

 2-locularibus, exocarpio fragili, endocarpio osseo, mesocarpio crasso spongi- 

 oso. 



Hainan: northwest slope of Five Finger Mountains, in shade along 

 streams, W. Y. Chun, no. 1734, May 27, 1920. 



A species well characterized by its entire, somewhat acuminate leaves 

 which are inequilateral and acute at the base; by its slender branchlets; 

 by being entirely glabrous except for its deciduously fulvus-puberulent 

 fruits, which at full maturity are glabrous or nearly so; and by its sessile, 



1 Gagnepain, F. Contribution & la connaissance des Xanthophyllum. (Jour, de Bot. 

 xxi. 241-253 [1903]). 



