xiii, c, 1 Merrill: Philippine Plants, XI n 9 



noribus, circiter 2 mm longis, obovatis, ad oblongo-obovatis vel 

 obovato-spatulatis, navicularibus, baud 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 wideif 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. 26428 Ramos 

 & 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 



ARISTOLOCHIA Linnaeus 

 ARISTOLOCHIA HUMILIS 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; fructibus 

 oblongo-ellipsoideis, circiter 2.5 cm longis, 6-carinatis, apice ob- 

 tusis, basi acuminato-attenuatis. 



