XV. 6 Merrill: Additio7is to Flora of Guam 543 



very scarce. The native name hayun lago means foreign wood, and would 

 indicate that the tree is an introduced one in Guam. Few of the natives 

 have ever seen the species. I saw two trees standing close together with 

 trunks perhaps 6 feet in diameter, and a height of from 60 to 70 feet, 



EUPHORBIACEAE 



EUPHORBIA Linnaeus 

 EUPHORBIA MACGILLIVRAYi Boiss. in DC. Prodr. 15' (1862) 26. 



Guam, Nelson Jf06, December, 1918, on rocks along the Atau- 

 tauo road. 



The species has previously been reported only from Australia. 

 It is also represented by Volkens 102 (in part) from Yap, Caro- 

 line Islands, this number having been identified by Volkens as 

 Euphorbia serrulata Reinw. My sheet of this number presents 

 two distinct species; the softly pubescent one I here refer to 

 Boissier's species, while the glabrous form may be a robust form 

 of Euphorbia serrulata Reinw. 



STERCULIACEAE 



MELOCHIA Linnaeus 



MELOCHIA VILLOSISSIMA (Presl) comb. nov. 



Riedleia villosissima Presl Rel. Haenk. 2 (1835) 146. 



Melochia hirsutissima Merr. in Philip. Journ. Sci. 9 (1914) Bot. 113. 



Guam, McGregor ^56 (type of Melochia hirsutissima Merr,), 

 Nelson 353, in ravines back of Piti, October and December. 



The type of Riedleia villosissima Presl was from Guam, but 

 the species was overlooked by me in preparing the manuscript 

 of my first paper on the Guam flora. Presl's description ap- 

 plies unmistakably to the species described by me as Melochia 

 hirsutissima, the description apparently having been based on 

 the uppermost and younger leaves. 



FLACOURTIACEAE 



XYLOSMA Forster f. 



XYLOSMA NELSON 1 1 nom. nov. 



Flacourtia integrifolia Merr. in Philip. Journ. Sci. 9 (1914) Bot. 115, 

 non Xylosma integrifolium Clos. 



Guam, Nelson 274, 322, March and December, 1918; Guam 

 Experiment Station ^66, July, 1912. 



Additional material with young fruits shows this species to 

 belong in the genus Xylosma rather than in Flacourtia where it 

 was originally placed. 



