516 
ROBINSON. 
sterile, witli extremely variable leases, the terminal linear-lanceolate, li to 7 cm 
long. The further relationship is alsoS obscure, but they may well approach 
nearest to the very imperfectly known E. filicoides Seemann, of Fiji. 
5. Elatostema filicaule sp. nov. 
Repens, caulibus gracilibus, glabris vel apice obscure retrorse pilosis : 
receptaculis staminiferis-pedunculis gracilibus suffultis, paucifloris, brac- 
teis corniculatis ; receptaculis pistilliferis ignotis : foliis parvis, membrana- 
ceis, oblique oblanceolatis ad obovatis, basi latere inferiore subauriculatis, 
latere superiore acutis, margine dentibus 1 vel 2 obtusis instructis. 
Staminate inflorescences solitary, on slender, glabrous peduncles 1 to 
2.5 cm long; receptacles 2 to 4 mm in diameter; outer pair of bracts, 
lance-ovate, including the spurs about 3.5 mm long, ciliate along the 
midvein; inner pairs much smaller, less than 2 mm long, elliptic-lan- 
ceolate, apiculate; flowers few (4 to 6), shortly pedicelled, very unequal 
in size, the perianth-segments 4, orbicular, of the largest about 2 mm 
long, the dorsally placed spur nearly 1 mm long; filaments about 1 mm 
long, the anther-cells 1.5 mm long, free except near the insertion: pis- 
tillate receptacles unknown. 
A slender, creeping jfiant, simple or less often sparingly branched, the 
stems mostly 10 to 20 cm long, glabrous or toward the apex with scattered 
reflexed hairs : leaves subsessile, the lamina membranaceous, obliquely 
oblanceolate or oboyate, 2 to 12 mm long, 2 to 6 mm wide, the lower 
frequently- reduced, the upper margin acute at the base, nearly straight 
and forming one subapical tooth, the lower margin produced into a short 
rounded auricle at the base, 1- or 2-toothed, the apical tooth of the leaf 
broadly rounded or barely apiculate, margins of the sinuses often over- 
lapping at least at their bases ; the upper surface more or less -pilose and 
with fairly numerous, comparatively long cystoliths, the under surface 
glabrous except rarely along the veins, and destitute of cystoliths; 
triplinerved, additional veins on each side 1 or 2 ; stipules linear-lanceolate, 
about 1 mm long. 
Luzon, Province of Benguet, Pauai, in mossy forest at about 2100 m elevation, 
Merrill 6621. Among Philippine species, resembling only the next two, E. 
inaequifolium being easily distinguished by the different shape of the leaves, and 
E. heterophyllum by the very different dentation and the pubescent stems. 
6. Elatostema inaequifolium Elmer Leaf. Philip. Bot. 3 (1910) 887. 
Repens, simplex vel ramosum, glabrum, 10 ad 20 cm longurn : in- 
florescentiis staminiferis pedunculis gracilibus 5 mm ad 1 cm longis 
suffultis, 3 mm diametro, paucifloris, bracteis exterioribus orbieulari- 
ovatis, acuminatis, brevissime corniculatis, floribus tetrameris: inflores- 
centiis pistilliferis sessilibus,' 2.5 mm diametro’, bracteis ' exterioribus 
oblongo-lanceolatis, parce ciliatis, brevissime corniculatis; perianthio 
obseurissime trilobato, minuto ; ovario compresso-oblanceolato, leviter 
striato : foliis subsessilibus, membranaceis, lanceolatis vel ovatis, valde 
