374 
The Philippine Journal of Science 
1919 
This species is very similar in appearance to Elatostema fili- 
caule C. B. Rob., from which it is easily distinguished by its 
hirsute stems and the hirsute midrib and nerves on the lower 
surface of the leaves. 
ELATOSTEMA 2AMB0ANGENSE sp. nov. 
Herba erecta, ramis et petiolis et pedunculis dense pallide 
pubescentibus ; foliis plerumque oblongo-ovatis, 7 ad 13 cm longis, 
in siccitate viridibus, chartaceis ad subcoriaceis, valde inaequi- 
lateralibus, utrinque cystolithis numerosis perspicuis instructis, 
apice acuminatis, margine sursum grosse dentatis; receptaculis 
S axillaribus, solitariis, pedunculatis, 1 ad 1.5 cm diametro, pe- 
dunculo usque ad 2 cm longo, bracteis exterioribus pubescentibus, 
late rotundatis, bracteolis sepalisque glabris. 
An erect, simple herb, attaining a height of 35 cm, the stems, 
very short petioles, and peduncles rather densely pubescent with 
short, somewhat appressed, pale hairs. Leaves variable, green 
/• when dry, chartaceous to subcoriaceous, very inequilateral, mostly 
oblong-ovate, 7 to 13 cm long, 3 to 5.5 cm wide, both surfaces 
with very short, numerous, irregularly disposed, elongated cys- 
toliths, distinctly visible to the naked eye, the apex somewhat 
acuminate, base broadly rounded on one side, narrowly rounded 
on the other and laterally cordate, margins entire near the base, 
rather coarsely toothed above, the teeth broadly triangular; lat- 
eral nerves above the basal ones 3 or 4 on each side of the 
midrib, very prominent on the lower surface, the reticulations 
lax, prominent; stipules linear-lanceolate, acuminate, 1 to 1.2 cm 
long. Staminate receptacles axillary, solitary, 1 to 1.5 cm in 
diameter, their peduncles up to 2 cm long; outer bracts pubes- 
cent, apparently reniform and more or less grown together, 
broadly rounded, about 1 cm wide, somewhat pubescent externally 
and with numerous, very densely disposed cystoliths; bracteoles 
narrowly oblong, membranaceous, 4 mm long, glabrous. Stami- 
nate flowers very numerous, their pedicels 3 to 4 mm long, gla- 
brous. Sepals 4, membranaceous, glabrous, oblong, two of them 
distinctly cucullate and more or less corniculate, 2 to 2.5 mm long. 
Mindanao, Zamboanga District, Sax River, back of San 
Ramon, Merrill 8228, November 27, 1911, in a damp, shaded 
ravine, altitude about 200 meters. 
Among the Philippine species with peduncled staminate re- 
ceptacles this species is apparently most closely allied to Elatos- 
tema carinoi W. R. Shaw, but is readily distinguished by its 
pubescent stems and its much elongated pubescent peduncles. 
