IX, C, 4 
Merrill: Plantae Wenzelianae, II 
361 
The genus is new to the Philippines. So far as known there are five 
species in the Malay Peninsula, one extending to Sumatra, and apparently 
a few undescribed forms in Borneo. 
DERRIS Loureiro 
DERRIS LEYTENSI8 sp. ptov. § Aganope. 
Frutex scandens partibus junioribus inflorescentiisque breviter 
adpresse hirsutus exceptis glaber; foliis 3-foliolatis, foliolis 
oblongo-ovatis, subcoriaceis, acutis vel obtusis, basi obtusis ad 
rotundatis, usque ad 11 cm longis, in siccitate pallidis, nervis 
utrinque 7, prominentibus ; paniculis axillaribus terminalibusque, 
folia subaequantibus, multifloris; floribus albis, circiter 7 mm 
longis; fructibus ignotis. 
A scandent shrub reaching a height of 15 m, the branches 
terete, brown, glabrous, the younger ones more or less appressed- 
hirsute with short brownish hairs. Leaves 3-foliolate, the pe- 
tioles 4 to 5 cm long, the basal part somewhat thickened, gray, 
the rest brown; petiolules gray, 5 to 7 mm long; leaflets ex- 
stipellate, oblong-ovate, subcoriaceous, shining, pale when dry, 
6 to 11 cm long, 2.5 to 5.5 cm wide, acute or obtuse, base acute 
to rounded ; lateral nerves 7 on each side of the midrib, prominent 
on the lower surface, curved-ascending, anastomosing, the reti- 
culations slender. Panicles terminal and in the upper axils, 
about as long as the leaves, many-flowered, the branches few, dis- 
tant, spreading, all parts appressed-hirsute with short brownish 
hairs. Flowers white, about 7 mm long, their pedicels 1 to 1.5 
mm long. Calyx cup-shaped, somewhat pubescent, 3 mm long 
and wide, the upper two teeth more or less connate, the lower 
three small. Standard orbicular, 7 mm wide, the claw 1 mm 
long, apex retuse, base subacute, not callose; wings equaling the 
standard, narrowly oblong-obovate, rounded, the limb 5 mm long, 
2.5 mm wide, claw slender, 2.5 mm long, base obscurely auricled 
on the broader side ; keel equaling the claw, petals slightly coher- 
ent, the claw 3 mm, the limb 4 mm long, 2 mm wide, obscurely 
auricled at the base on one side. Vexillary filament free through- 
out, 3 mm long, the others united for the lower 2 to 3 mm, glab- 
rous. Ovary sessile, oblong, pubescent, including the style 7 mm 
long; ovules 2; style pubescent below, glabrous above, more or 
less curved. 
Leyte, Buenavista, near Jaro, in forests, altitude about 500 m, C. A. 
Wenzel 8bl, June 5, 1914. 
A species of the section Aganope, leaflets 3, exstipellate, standard not 
callose at the base, the vexillary filament free throughout. It is best 
characterized by its 3-foliolate leaves, and its alliance seems to be with 
Derris palawanensis Elm. 
