XIV, 4 Merrill: Noteworthy Philippine Plants, XV 375 
ELATOSTEMA ACUMATISSIMUM sp. nov. 
Herba erecta, circiter 50 cm alta, ramulis junioribus pubes- 
centibus, foliis subtus ad costa nervisque parce pilosis; foliis 
lanceolatis ad anguste lanceolatis, membranaceis, 9 ad 16 cm 
longis, leviter falcatis, apice tenuiter caudato-acuminatis, mar- 
gine grosse dentatis, dentibus numerosis, plerumque leviter 
acuminatis; receptaculis ¢ axillaribus, solitariis, sessilibus, sub- 
globosis, bracteis exterioribus late ovatis ad reniformi-ovatis, 9 
mm latis, leviter carinatis, haud corniculatis; bracteolis spatu- 
latis, hirsutis. 
An erect, usually unbranched herb, about 50 cm high, the tips 
of the branches slightly pubescent, the leaves with scattered, 
rather weak, spreading, pale hairs on the lower surface, the 
nerves and reticulations beneath dark brown in contrast with 
the greenish epidermis. Leaves lanceolate to narrowly lanceo- 
late, membranaceous, 9 to 16 cm long, 2 to 3.5 cm wide, oliva- 
ceous when dry, somewhat falcate, the upper surface with 
numerous, irregularly disposed, somewhat elongated cystoliths, 
these obsolete on the lower surface, the apex slenderly caudate- 
acuminate, the base slightly inequilateral, both sides of the lamina 
acute to obtuse, the margins very coarsely toothed, the teeth 
usually 20 or more on each side, somewhat ovate, their tips 
usually somewhat acuminate and often incurved, those of the 
acumen extending at least half way to the midrib; lateral nerves 
above the basal ones, about 10 on each side of the midrib, very 
prominent on the lower surface, the reticulations lax, prominent. 
Staminate receptacles sessile, axillary, solitary, subglobose, about 
9 mm in diameter; outer bracts broadly ovate to reniform-ovate, 
about 9 mm wide, somewhat hirsute, more or less keeled, but 
scarcely corniculate, the inner bracts oblong, hirsute, keeled, 
about 4 mm long; bracteoles spatulate, hirsute, as long as the 
inner bracts. Staminate flowers numerous, pedicelled, the sepals 
oblong-elliptic, about 2 mm long, their apices prominently ciliate 
with long white hairs. 
Luzon, Tayabas Province, Umiray, Bur. Sci. 29015 Ramos & 
Edafio, June 2, 1917, in damp forests along the river at low 
altitudes. 
The alliance of this species is with Elatostema angustatum 
C. B. Rob. and Elatostema contiguum C. B. Rob., but more espe- 
cially with the latter from which it is especially distinguished 
by its much larger and more prominently toothed, caudate- 
acuminate leaves. 
