298 The Philippine Journal of Science 1919 
the last two rather common littoral Malayan species, although 
represented in the Philippines by distinct varieties. 
The thirteen species of Daemonorops are also, with the excep- 
tion of D. Margaritae, of southern China, all endemic, but 
several of them are closely related to species growing in neigh- 
boring countries. Thus D. Gaudichaudii, D. affinis, and D. gra- 
cilis are related to the common D. hystrix; D. ochrolepis 
approaches D. Rumphii, of the Moluccas; and D. virescens is 
allied to D. longipes, a common littoral Malayan species. 
Korthalsia laciniosa is also a common littoral plant in southern 
Asia, but K. scaphigeroides and K. Merrillii are endemic, al- 
though related to Malayan species. 
The only Zalacca known from the Philippines, Z. Clemensiana, 
belongs to the group which have the fruits covered with spicu- 
liferous scales, as Z. edulis and allied species. 
Plectocomia Merrillii is evidently a derivation from the Bor- 
nean P. Muellerii. 
On the whole we are led to conclude that the Philippine palms 
have in great measure originated in the Archipelago, but their 
phylogeny may be traced to species growing chiefly in Borneo, 
Celebes, the Moluccas, and Indo-China, excluding about a dozen 
species, which possess adaptations for easy dissemination, and 
for this reason are palms of rather wide geographic distribution. 
In addition a Polynesian element is represented by Adonidia 
and Heterospathe. 
The palm flora of the Philippines has, therefore, no individual- 
ity as to genera, the only genus peculiar to the Archipelago 
being the monotypic new genus Adonidia. 
In the Philippines a few large genera have varied so much 
as to give origin to numerous species, quite different in that 
respect from what has happened in Polynesia, where monotypic 
or oligotypic genera are numerous, and where no genus occurs 
that contains a great number of species. 
ENUMERATION OF THE PALMS INDIGENOUS TO, OR NATURALIZED 
IN, THE PHILIPPINE ISLANDS 
Areca Catechu Linn. (var. com- Areca parens Becc. 
munis). ‘= Areca Ipot Becc. 
Areca Catechu var. silvatica Bece. Areca Ipot var. polillensis Becc. 
Areca Catechu var. batanensis Becc. Areca camarinensis Becc. 
Areca Catechu var. longicarpa Becc. Areca Caliso Becc. 
Areca macrocarpa Becc. Areca costulata Becc. 
Areca Whitfordii Becc. Areca Vidaliana Becc. 
Areca Whitfordii var. luzonensis Areca Hutchinsoniana Becc. 
Becc. Pinanga maculata Porte. 
