PHILIPPINE URTICACEAE. 
523 
flowers, the others pistillate only. A plant of high elevations, noted on Banajao 
and Apo from 1800 to 2475 m. This is the species referred to on page 499 as 
having pistillate flowers with a perianth abnormal for the genus by being often 
incurved and when outspread of greater length in proportion to the ovary than in 
most other species. Owing to the minuteness and delicacy of the perianth, its 
exact nature is often difficult to determine, and this character may prove less 
unusual : in any event, there can be no doubt of the close alliance of E. pulcliellum 
to the following species. 
14. Elatostema acrophilum sp. nov. 
Dioicum, receptaculis staminiferis ignotis, pistill if eris . sessilibus ; 
perianthio minuto: caulibus apice adpresse setosis; foliis membranaceis, 
utrinque glabris, .saepius subfaleatis, valde inaequilateralibus, lateris 
inferioris basi auriculatis, margine 2- ad 5-dentatis, 4- ad 6-plinerviis. 
Dioecious : . pistillate receptacles sessile, 4 mm in diameter ; outer 
pair of bracts ovate, eiliolate or glabrous, ,1.5 mm long, obtuse, obscurely 
corniculate, inner bracts somewhat longer, stellately disposed, strongly 
ciliate, corniculate or acuminate; bracteoles linear-oblaneeolate ; pedicels 
about 0.6' mm long; perianth-segments 3, less than 1 mm long, obtuse; 
ovary ellipsoid, about 0.5 mm long; stigma penicillate. 
Weak creeping plants, usually , branched, the stems 10 to 25 cm long, 
'minutely appressed-setose at the apex; leaves subsessile, alternate' or 
very' rarely subopposite, the basal -often greatly reduced, with these ex- 
cepted the lamina membranaceous, obliquely elliptic or obovate, 8 to 
25 mm long, 4 to 8 mm wide, strongly inequilateral, subfalcate, the 
base of the upper side meeting the costa 1 to 2 mm from the stem at 
an acute or subobtuse angle, the base of the lower side forming a broad 
rounded auricle often overlapping -the stem; upper margin with 2 to 4, 
lower with 2 to 5 teeth, these obtuse or the lower acute; apical tooth 
not or slightly projecting beyond the general outline of the leaf, lan- 
ceolate to ovate, 1 to 4 mm long, obtuse or acute ; both surfaces glabrous 
and with cystoliths, the under glaucescent; 4- to 6-plinerved, in ad- 
dition to the costa and 'the normal nerve on either side, usually with 1 
on the upper side and 2 on the lower developing exteriorly; additional 
veins 3 or 4, well reticulated on the upper surface; stipules lanceolate, 
acute, about l mm long. 
Luzon, Province of Laguna, at and near summit of Mount Banajao, Bur. Sci. 
6577 RoMnson (type), Copeland s. n., growing with the last, to which, however, 
it is not as nearly allied as to the following. 
15. Elatostema microphyllum Elmer Leafl. Philip. Bot. 1 (1908) 286. 
Subcaespitosum, caulibus apice praesertim adpresse pubescentibus : 
dioicum ; receptaculis pistilliferis .sessilibus, parvis, floribusque eis speciei 
praecedentis similibus: foliis altemis, subsessilibug, oblique oblanceolatis, 
oblongis, vel obovatis, 6 ad 13 mm longis, 3 ad 4.5 mm latis, vel in- 
ferioribus minoribus," basi utrinque cuneatis vel margine inferiore leviter 
auriculatis, Supra medium latere superiore 2- vel 3-dentatis latere in- 
