xiii, c, i Merrill: Philippine Plants, XIII 9 
noribus, circiter 2 mm longis, obovatis, ad oblongo-obovatis vel 
obovato-spatulatis, navicularibus, haud corniculatis ; floribus 
4-meris. 
A slender, erect, branched herb 20 to 40 cm high, glabrous 
except the inflorescences. Stems greenish when dry, about 3 
mm in diameter, the branches slender, ascending, up to 16 cm 
in length, less than 1 mm in diameter, with numerous cystoliths. 
Leaves linear-lanceolate, somewhat falcate, subchartaceous, dark- 
green when dry, 3 to 4 cm long, 3 to 6 mm wide, slenderly 
acuminate, base acute, somewhat inequilateral, both surfaces 
with numerous, irregularly arranged cystoliths, margins prom- 
inently and sharply toothed above the middle, 4 to 6 teeth on 
each side; wider side of the leaf with a single ascending nerve 
leaving the midrib 2 to 3 mm above the base and extending one- 
fourth to one-third to the apex, the nerves and reticulations 
otherwise obsolete; petioles 0.5 mm long. Staminate inflores- 
cences axillary, sessile, 3 to 4 mm in diameter, ciliate, the outer 
two bracts orbicular, 3 mm in diameter, the tip with a 0.5 mm 
long apiculus, margins prominently glabrous, the inner ones 
smaller, the innermost about 2 mm long, oblong-obovate to oblong 
or oblong-spatulate, navicular, hooded, ciliate toward the tips, 
not corniculate. Staminate flowers 4-merous, their pedicels up 
to 1.5 mm long, the perianth about 1 mm long, the segments 
obscurely penicillate. 
Luzon, Nueva Ecija Province, Mount Umingan, Bur. Sci. 26J,.28 Radios 
& Edano, August 18, 1916, on rocks in forests. 
A most characteristic species readily distinguished by its slender branches 
and very narrow, prominently toothed leaves, which, except for the midrib 
and single basal nerves, are without evident nerves or reticulations. 
ARISTOLOCHIACEAE 
ARISTOLOCH I A Linnaeus 
ARISTOLOCH I A HUMMUS sp. nov. 
Species A. philippinensis Warb. affinis. Suffrutex erectus cir- 
citer 40 cm altus, simplex vel parce ramosus; foliis membrana- 
ceis ad chartaceis, ovatis ad oblongo-obovatis, usque ad 25 cm 
longis, supra olivaceis, nitidis, glabris, subtus pallidioribus et 
parce pubescentibus, basi subacutis ad rotundatis, apice acutis, 
obtusis, vel latissime obtuse acuminatis, nervis utrinque circiter 
7, prominentibus, adscendentibus ; racemis axillaribus, usque ad 
6 cm longis; floribus tenuibus, circiter 3 cm longis; fruetibus 
oblongo-ellipsoideis, circiter 2.5 cm longis, 6-carinatis, apice ob- 
tusis, basi acuminato-attenuatis. 
