306 
ROBINSON. 
continuing the general outline ; upper surface with not very conspicuous 
eystoliths and usually with scattered but conspicuous fairly long white 
hairs, under surface with shorter and often yellowish pubescence on the 
veins and to a less extent between them; triplinerved or with a short 
additional nerve arising from the costa below the main nerve of the 
wider side; other veins usually 3 on each side of the eosta; stipules 
hyaline, lanceolate, 2.5 to 3 mm long, ciliolate on the margins and at 
or near the apex often eiliate. 
Luzon, Subprovince of Benguet, Mount Tonglon, in very shaded places along 
trail at about 1,800 m elevation, Merrill 76^7. The closest Philippine ally of 
this species is probably E. acrophilum C. B. Rob., of which the staminate re- 
ceptacles are still unknown, E. merrillii differing from it by the more pubescent 
stems, more numerous and shallower leaf-teeth, and venation. 
33a. Elatostema purpureum sp. riov. 
Basi reptans, aliter ascendens, caulibus purpureis, scabris : recepta- 
culis staminiferis sessilibus vel breviter pedunculatis, bracteis vix corni- 
culatis ; floribus tetrameris : receptaculis pistilliferis sessilibus : foliis 
subsessilibus, oblique obovatis vel oblaneeolatis, basi latere angustiore 
acutis, latere latiore breviter auriculatis, marginibus dentatis, apice saepius 
breviter acuminatis, triplinerviis. 
Staminate receptacles sessile or on peduncles up to about 3 mm long; 
outer pair of bracts 4.5 to 5 mm long, 6.5 to 7 mm wide, rounded and 
very shortly and inconspicuously comiculate at the apex, densely villose 
on the back ; inner two pairs of bracts 3.5 to 4 mm long, somewhat 
inequilateral, subquadrate or suborbicular, the margins more or less 
hyaline, elsewhere villose, eiliate at the apex, hardly corniculate ; bracteoles 
oblong-oblanceolate, 4 mm long, villose on the costa, eiliate at the apex; 
pedicels up to 3.5 mm long; perianth-segments 4, oblong-lanceolate or 
lanceolate, 1.5 to 2.5 mm long, eiliate or glabrous, one pair corniculate; 
filaments about 2 mm long; anthers white, about 1 mm long: pistillate 
receptacles sessile; outer pair of bracts broadly ovate, 3.5 mm long, villose; 
inner pairs lanceolate, nearly 3 mm long, eiliate at the apex; pedicels 
short; perianth-lobes probably 3, about 0.1 mm long; ovary white, 0.5 mm 
long. 
Plants creeping at the base, thereafter curving-ascending, the purple 
stems 20 to 35 cm long, rarely branched, strigose : leaves almost sessile, 
the rigidly chartaceous or coriaceous lamina oblanceolate to obovate, 3 
to 5 cm long, 1 to 1.8 cm wide, the base of the narrower side acute, of 
the wider side shortly auriculate, the margins on the wider side with 
7 to 14 teeth, on the narrower with 5 to 11, the apical tooth more often 
extending from 4 to 6 mm beyond the general outline; both surfaces 
strigose-scabrous, the upper with numerous cystoliths; triplinerved, the 
nerve of the wider side more often uniting with the .lower of the succeeding 
3 to 5 veins by minor anastomoses only, veins of the narrower side 2 or 3 ; 
