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XII, C, 5 Merrill: New Philippine Shrubs and Trees 269 
LEGUMINOSAE 
TRIFIDACANTHUS Merrill genus novum 
(Papilionatae-Hedysareae-? Desmodiinae) 
Calycis membranacei, tubus brevis; lobi 2 superiores omnino 
connati vel apice minute 2-dentatae, 3 inferiores ovato-lanceo- 
lati, acuminati. Vexillum late obovatum, basi cuneatum, sessile 
vel subsessile; alae oblongae, obtusae; carina leviter falcata, 
obtusa. Stamen vexillare a basi libera, caetera connata; an- 
therae uniformes. Ovarium breviter stipitatum, lineare, cir- 
citer 6-ovulatum ; stylus leviter incurvus, glaber, stigmate minute 
terminali. Legumen * * *, Frutex parvus, erectus, sub- 
- glaber, spinis longis rectis sparsis trifidis armatae. Folia 1- 
foliolata, foliolis minute stipellatis, ellipticis ad oblongo-ellipticis, 
integris, breviter petiolatis. Stipulae striatae, siccae, liberae. 
Flores purpurei, mediocri, racemosi, racemis axillaribus, bre- 
vibus, solitariis, paucifloris. Bracteae late ovatae, striatae, 
parvae; bracteolae 0. 
TRIFIDACANTHUS UNIFOLIOLATUS sp. nov. 
Frutex erectus, 1 ad 2 m altus, ramis numerosis, rigidis, tere- 
tibus; foliis alternis, breviter petiolatis, foliolis ellipticis ad 
oblongo-ellipticis, utrinque rotundatis, apice minutissime apicu- 
latis, in siccitate pallidis, nitidis, 1.5 ad 3 em longis; spinis spar- 
sis, rectis, rigidis, tenuibus, trifidis, 8 ad 17 mm longis; racemis 
axillaribus, solitariis, paucifloris, leviter pubescentibus, circiter 
3 cm longis; floribus circiter 1 cm longis. 
An erect, much-branched, nearly glabrous shrub 1 to 2 m 
high, the branches stiff, terete, grayish, rugose when dry, 
searcely lenticellate, the wood pale-yellowish, some of the nodes 
armed with stiff, slender, straight, sharp, trifid spines, their 
branches 8 to 17 mm long. Leaves numerous, alternate, 1- 
foliolate, their petioles 2 to 4 mm long, minutely bistipellate at 
the base of the very short, geniculate petiolule; blades elliptic to 
oblong-elliptic, equilateral, entire, subcoriaceous, equally rounded 
at both ends, the apex minutely apiculate, 1.5 to 3 cm long, 7 
to 15 mm wide, pale and shining when dry, the lower surface 
often slightly glaucous, glabrous, or when young minutely pube- 
rulent; lateral nerves 6 to 8 on each side of the midrib, slender, 
anastomosing, not prominent, the reticulations distinct under 
a lens, rather close; stipules dry, striate, ovate-lanceolate, 1.5 
to 2 mm long, acuminate. Racemes axillary, solitary, slender, 
few-flowered, about 3 cm long, sparingly pubescent, subtended 
by numerous, somewhat distichous,-imbricate bracts similar to 
