20, 4 Merrill: Noteworthy Philippine Plants, XVII 377 
habit, being freely branched, and further differs in its floral char- 
acters. Itis very easily distinguished from Elatostema lignosum 
Merr. by its entirely different habit, the stems creeping and 
rooting below not being strictly erect and woody. The floral 
characters of the two species are radically different. 
ELATOSTEMA LIGNOSUM sp. nov. 
Erecta, ramosa, fruticosa, usque ad 80 cm alta, caulis tere- 
tibus, lignosis, 4 ad 5 mm diametro, ramis paucis, elongatis, 
adpresse strigoso-hirsutis; foliis chartaceis, fragilis, olivaceis, 
lanceolatis, usque ad 9 cm longis, tenuiter caudato-acuminatis, 
basi inaequilateralibus, acutis, margine subgrosse serratis, supra 
glabris, olivaceis, cystolithis numerosis instructis; nervis utrin- 
que 5 ad 9, subtus valde perspicuis et adpresse strigoso-hirsutis ; 
inflorescentiis ¢ axillaribus, sessilibus, 4 ad 5 mm diametro, 
bracteis liberis, exterioribus orbicularibus, rotundatis, leviter 
ciliatis, 3.5 mm longis, bracteolis spatulatis; floribus numerosis, 
4-meris, segmentis oblongis ad ellipticis, 1.5 mm longis, haud 
corniculatis. 
An erect, branched, woody plant up to 80 cm high, the stems 
terete, 4 to 5 mm in diameter, olivaceous when dry, the epidermis 
supplied with very numerous cystoliths, the branches few, elon- 
gated, up to 20 cm in length, the branchlets terete, appressed- 
strigose-hirsute, olivaceous. Leaves chartaceous, lanceolate, 5 
to 9 cm long, 1.2 to 2.5 cm wide, brittle when dry, olivaceous, 
inequilateral, the base acute on both sides, one side longer and 
broader than the other, the apex slender, caudate-acuminate, the 
margins rather coarsely serrate except near the base, the upper 
surface olivaceous, densely covered with numerous, irregularly 
disposed cystoliths which are distinctly visible to the naked eye, 
the lower surface slightly paler than the upper, the midrib, 
marginal and lateral nerves very prominent, the lateral nerves 
5 to 9 on each side of the midrib, anastomosing directly with 
the more or less arched marginal nerves, the cystoliths chiefly 
confined to the midrib, nerves, and reticulations, the midrib and 
primary nerves more or less appressed-strigose-hirsute ; stip- 
ules lanceolate, acuminate, 3.5 mm long. Staminate inflores- 
cences axillary, solitary or in pairs, sessile, 4 to 5 mm in diameter. 
Outer bracts orbicular, free or nearly so, 3.5 mm long, rounded, 
slightly ciliate; bracteoles spatulate, about 2 mm long, more or 
less ciliate above. Flowers numerous, 4-merous, the perianth 
segments oblong to elliptic, about 1.5 mm long, slightly ciliate 
at the apex, acute, two of them slightly cucullate, none spurred. 
