xv, 6 Merrill: Additions 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 2 (1862) 26. 
Guam, Nelson 406, 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 
ME LOCH I A 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 456 (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 NELSONII 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 466, 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. 
