LEAFLETS OF PHILIPPINE BOTANY 
EDITED BY A. D. E. ELMER, A. M. 
Vol. II. Manila, P. I., January 11, 1911. Art. 54 ^. 
NEW AND NOTEWORTHY RUBIACEAE 
BY 
A. D. E. Elmer 
—0— 
In the first article of the Leaflets of Philippine Botany, 
published four years ago, there were enumerated forty-two 
genera and one hundred and fifty four species of Rubiaceae, 
forty-five of which were therein described for the first time. 
Since then, botanical explorations in these islands greatly 
added to this particular family, so that now there are def- 
initely known sixty-two genera and upwards of three hundred 
and twenty-five species. 
Out of the score of genera added to our Rubiaceae flora, 
only two new genera were described, both of which were for- 
merly considered by me under Urophyllum sablanense and Mus- 
saendopsis multiflora. These have recently been segregated and 
described by Mr. Merrill under Williamsia and Greeniopsis 
respectively. Most of the increase in genera is therefore ` 
due to the discovery within our limit of such genera previously 
not known from the Philippines. 
Not so with the species, for over fifty per cent of the 
enormous increase have proved new. Such genera as Psycho- 
tria, Hedyotis, Lasianthus, Ixora, Randia, Timonius, Urophyllum 
and Mussaenda, yielded the most numerous novelties. While 
Oldenlandia, Morinda, Plectronia, Sarcocephalus are among those 
yielding the least number of new species. The former series 
' of genera are subalpine and inhabit dense humid forests, and 
those in the latter series mostly inhabit the lowlands, and 
