158 PHILIPPINE PALMS 
as Gibbs reports a very much smaller sap flow from Philippine 
palms than do Barrett and Hines, while De Vry* and Ta- 
chirch,+ give the estimated sugar yield at a much lower figure 
than do these writers. The small amount of sugar produced 
in the Philippines is brown in color, resembles that secured 
from the buri palm (Corypha), and enters the local commerce 
of the Philippines to a very limited degree. 
ARENGA TREMULA (Blanco) Bece. (A. mindorensis Becc.). (Plate IX). 
DUMAYAKA. 
Local names: Abigi, abiki, gumakd, rumaka (Bikol); abiki (Tagalog) ; 
banisan (Moro); baris (Bagobo); batbaét (Tagbanua); bélis, tipon-tipon 
(Bisaya) ; dumaydka, dayumaka, gumaydka (Tagalog). 
This small-sized, endemic palm, often growing in large clumps 
or tufts, is very distinctly ornamental, and on this account 
well worthy of extended cultivation. There are now some 
beautiful specimens in cultivation in Manila. It is usually only 
3 to 4 meters in height, the trunk usually being very short or 
almost wanting. The petioles are rather long, while the leaflets 
are narrow, linear, 20 to 35 centimeters long and from 13 to 
18 millimeters wide, toothed and sometimes slightly lobed at 
the apex. It is widely distributed in the central Philippines, 
but is of very local occurrence, although abundant in some lo- 
calities. The peduncles of the inflorescences are said to be 
sometimes tapped for the juice or tuba; but as the palm is de- 
cidedly small, the tuba yield must be slight, so that it is certainly 
very little utilized for this purpose. The chief use of the palm 
is found in the industrial materials it yields, these being es- 
pecially good for the manufacture of certain types of baskets. 
Splints are prepared from the petioles and vary in color from 
light to dark brown when the epidermis is removed. Parts 
showing the epidermis are grayish green. 
The bud, if eaten in considerable quantity, is said to cause 
a sort of intoxication followed by long and profound sleep. 
Genus CALAMUS Linnaeus 
The RaATTANS (Plates X-XIV). 
This genus is represented in the Philippines by many species, 
while individuals are exceedingly abundant in the forested areas 
of the Archipelago. The rattan palms are strictly sylvan, and 
individuals are most abundant at low and medium altitudes in 
the virgin forest. They are occasionally found in thickets or 
in the second-growth forests, but never in the open country. - 

* Watt, A dictionary of the economic products of India. 
7 Indische Heil-und Nutzflanzen. 
