17. 6 
Merrill: Studies on Philippine Rubiaceae, IV 455 
the seeds are not sufficiently developed to determine this point. 
In the characters of its infructescence it approaches Psychotria 
papillatcb Merr., although it is not otherwise closely allied to 
this species, differing remarkably in its smaller, fewer-nerved, 
differently shaped leaves and entirely different indumentum. 
PSYCHOTRIA OBSCURINERVIA sp. nov. § Grumilea. 
Frutex scandens, glaber; foliis chartaceis ad subcoriaceis, in 
siccitate pallidis, usque ad 6.5 cm longis, oblongis, utrinque sub- 
aequaliter angustatis, apice obtusis ad latissime obtuseque acu- 
minatis, basi cuneatis, nervis utrinque 5 vel 6, valde inconspicuis ; 
infructescentiis terminalibus, pedunculatis, pyramidatis, usque 
ad 16 cm latis, diffusis, multifloris; fructibus anguste ellip- 
soideis, circiter 4.5 mm longis, laevis, pericarpio haud carnoso, 
seminibus plano-convexis, haud sulcatis, albumine ruminato. 
A scandent, glabrous shrub, the branches terete, reddish- 
brown or brownish, 3 to 5 mm in diameter, smooth, their inter- 
nodes 1 to 1.5 cm long. Leaves chartaceous to subcoriaceous, 
pale when dry, somewhat shining, oblong, 4 to 6.5 cm long, 1.5 
to 2.5 cm wide, subequally narrowed to the cuneate base and 
to the obtuse or broadly and obtusely acuminate apex; lateral 
nerves 5 or 6 on each side of the midrib, very slender, obscure, 
the reticulations obsolete; petioles about 5 mm long; stipules 
caducous. Inflorescences terminal, peduncled, pyramidal, dif- 
fuse, many-flowered, 13 to 16 cm wide, about 10 cm long ex- 
cluding the 5 to 6 cm long peduncle, the primary branches 
opposite, spreading, few, these branches at or above the middle, 
the branchlets opposite. Pedicels 1 to 2 mm long. Calyx about 
1 mm long, truncate or obscurely 4-toothed. Corolla about 4.5 
mm long, the lobes 2 mm long. Fruit narrowly ellipsoid, pale 
brownish when dry, not fleshy, about 4.5 mm long, smooth, not 
at all sulcate or ridged, the pericarp thin; pyrenes plano-convex; 
seeds plano-convex, not ridged, albumen somewhat ruminate. 
Luzon, Ilocos Norte Province, between Bangui and Claveria, 
Bur. Sci. 33077 Ramos, August 30, 1918, in forests at low alti- 
tudes. 
Among the scandent, glabrous Philippine species with pedun- 
cled, diffuse inflorescences the present one is readily distin- 
guished by its very obscurely nerved leaves, the reticulations 
being obsolete, the lateral nerves very slender and obscure. 
