130 JOURNAL OF THE ARNOLD ARBORETUM [vol. vi 



Mr. McClure has published a very interesting and instructive account 

 of his trips in Hainan. 1 



Hainan is located within the tropics being in approximately the same 

 latitude as the Hawaiian Islands and the northernmost part of the Philip- 

 pine Archipelago. Naturally we find represented here a number of genera 

 chiefly tropical in character, that do not occur in the continental part of 

 southern China. 



The actual types of the species described in this paper are deposited 

 in the herbarium of the University of California, and fragments ot all of 

 them have been placed in the herbarium of the Arnold Arboretum; dupli- 

 cates are in the herbarium of the University of Nanking. 



TAXACEAE 

 Dacrydium Solander 



Dacrydium elatum (Roxb.) Wallich in Hooker, Jour. Bot. u. 144, t. 2 



(1843). 



Juniperus data Roxburgh, Fl. Ind. ed. 2, in. 838 (1832). 



Hainan: Five Finger Mountains, along streams, altitude 1350 in. 

 W. Y. Chun, nos. 1367, 2989, April and June, 1920. 



No. 1367 represents a juvenile form. 



Indochina to Sumatra, Borneo, the Philippines, and Celebes. The 

 genus is new to China. 



MORACEAE 

 Taxotrophis Blume 



Taxotrophis macrophylla (Blume) Boerlage, Handl. Fl. Nederl. Ind. 

 in. 379 (1900). 



Hainan: road to Tahun, in ravines, W. Y. Chun, no. 1239, April 9, 

 1920. 



In the absence of staminate flowers it is difficult to distinguish between 



Balanostrcblus ilicifolia Kurz and Taxotrophis ilicifolia Vidal. Hutchinson 2 

 has cleared up the confusion between these two genera and species. 

 He accepts the name Taxotrophis ilicifolia Vidal for this form, which 

 extends from Burma and Chittagong to Indochina, the Malay Peninsula, 

 Philippines, Celebes and the Moluccas. I have, however, accepted the 

 older specific name given above, based on Streblus macrophyllus Blume 

 {Diplocos macrophylla Bureau) from Celebes. The genus is new to China, 

 except for Hemsley's record of Taxotrophis sp. from Hainan {Henry, 

 no. 8703), this specimen probably representing the same species as Chun's 

 no. 1239. 



1 McClure. F. A. Notes on the Island of Hainan. (Lingnaam Agric. Review, i. pt. I. 

 66-Sti. pi. 1-5, map [1922]). 



2 In Kew Bull. Misc. Inform. 1918, 150. 



