336 MERRILL AND MERRITT. 
ARISAEMA Mart. ; 
1. A. polyphyllum (Blanco) Merr. in Govt. Lab. Publ. (Philip.) 27 (1905) 90. 
A, cumingii Schott Syn. (1856) 28. 
Characteristic of the mossy forest, terrestrial and epiphytic, above 2,200 m, 
C. M. Z. 16352, Merrill 6474, 6473, 6617, the last three numbers representing 
specimens with respectively small, medium, and large-sized leaves. 
Luzon to Mindanao, on the higher mountains, exceedingly variable; endemic. 
Var. angustifolium var. nov. F 
A typo differt foliolis multo angustioribus, lineari-lanceolatis, 5 ad 
13 em longis, 5 ad 10 mm latis. 
Pine region below 2,000 m, Merrill 6472. Represented also by the following 
specimens: Province of Benguet, Pauai, Bur. Sci. 8364, 8466 pp. McGregor ; Twin 
Peaks, Elmer 6330 : District of Bontoe, Mount Polis, For. Bur. 18387 Alvarez: 
Province of, Zambales, Botolan, Maule s. n. 
This proposed variety at first sight is very distinct from the typical form of 
the species, especially in its vegetative characters. There is, however, some indi- 
cation of intergrades between the species and the variety, and I have been unable 
to detect any constant floral characters between the two forms. The variety 
angustifolium appears to be confined to the grassy open slopes of the pine region, 
but the typical form is sometimes found in the same habitat, although usually 
confined to the mossy forest. 
ERIOCAULACEA:. 
ERIOCAULON Linn. 
E. depauperatum Merrill sp. nov. 
Planta depauperata, dense caespitosa, aquatica, 2.5 ad 3 cm alta; 
foliis linearibus, 1 mm latis; pedunculis paucis, solitariis, vix exsertis ; 
capitulis paucifloris; sepalis utriusque floris 2, petalis florum femineorum 
subobsoletis. , 
A small densely caespitose plant 2.5 to 5 em high, glabrous throughout, 
entirely submerged. Leaves crowded, linear, flaccid, 1.5 to 4 cm long, 
composed of four or five distinct rows of quadrangular or oblong cells, 
base somewhat dilated, the lower part of the lamina 1 mm wide, gradually, 
narrowed upward to the long-acuminate apex. Peduncles few, solitary, 
1.5 cm long or less, not exserted, the heads subglobose, small, about 2 
mm in diameter, each bearing from 4 to 6 pistillate flowers and 3 or 4 
staminate ones, the, bracts thin, oblong-obovate or oblong-ovate, about 
as long as the head. Staminate flowers: Sepals 2, oblong-ovate, about 
1mm long. Petals 3, very minute, glabrous, reduced to small, obscure, 
bodies less than 0.5 mm in length. Stamens 6; anthers dark-purple or 
black, nearly 0.2 mm long. Pistillate flowers: Sepals 2, orbicular-ovate, 
about 1.8 mm long and wide. Petals 3, oblong-lanceolate, 1.5 to 1.8 mm 
long, about 0.5 mm wide, pellucid, the cell structure distinct, the apex 
_ acute and with usually a small, black, apical dot, the base acuminate- 
stipitate, the stipe slender, often 0.5 mm in length. Ovary brown, 3- 
