JOURNAL 



OF THE 



ARNOLD ARBORETUM 



Volume VI JULY, 1925 Number 3 



ADDITIONS TO OUR KNOWLEDGE OF THE FLORA OF 



HAINAN 



E. D. Merrill 



■ 



In 1920 'Sir. W. Y. Chun spent nearly a year in a botanical explora- 

 tion of Hainan, but no general study has as yet been made of his 

 extensive collection of over 3000 numbers. A partial set of the material 

 collected by him is in the herbarium of the University of Nanking and 

 from this set about 500 duplicates have been sent to me by Mr. A. N. 

 Steward of that Institution for identification. The Chun collections thus 

 far received supply several important additions to our knowledge of the 

 Chinese flora, in this short paper representatives of nine genera being 

 recorded for the first time from China : Dacrydium, Phyllochlamys, Popoivia, 

 Orophea, Drypetes, Calpigyne, Apodytes, Lithosanthes and Smytkea, several 

 of these being represented by previously undescribed forms. 



I have previously published several papers on the flora of Hainan, 1 

 and previous to my departure from Manila in November, 1923, prepared 

 a manuscript enumeration of Hainan plants. This contains the record 

 of approximately 1100 species of flowering plants and ferns from the 

 island, but manifestly the flora is much richer than this preliminary 

 enumeration would indicate. 



My papers were for the most part based on extensive botanical collec- 

 tions made in Hainan by Mr. F. A. McClure of the Canton Christian 

 College, who made two trips to the island, one from September to De- 

 cember, 1921, and the other from March to May, 1922. An enumeration 

 of the McClure collection is in process of publication by Mr. G. W. Groff 

 and his colleagues in the Canton Christian College, three parts having al- 

 ready been issued carrying the enumeration from the Filices through the 

 Solan aceae. 2 



1 Merrill, E. D. Two new species of plants from Hainan. (Philip. Jour. Sci. xix 

 677-679 [1921]); Diagnoses of Hainan plants, (op. cit. xxi. 337-355 [1922]); Diagnoses 

 of Hainan plants II. (op. cit. xxm. 237-268 [1923]). 



2 Groff, G. W., E. Ding and E. H. Groff. An enumeration of the McClure collection 

 of Hainan plants. (Lingnaam Agric. Review, i. pt. n. 27-86 [1923], n. 9-44 [1921]; 

 115-139 [1925]). 



