204 
ROBINSON. 
STERCULIACEJIf 
PTEROSPERMUM Schreb. 
Pterospermum subpeltatum Merrill sp. nov. 
Arbor : floribus axillaribus vel terminalibus, plerumque solitariis, pen- 
tameris; sepalis longis, ensiformibus, prope ad basim connatis; petalis 
sepalis brevioribus ; fructu capsulari, ligneo, 5-valvato, seminibus alatis: 
foliis alternis, oblongo-ovatis, peltatis vel subpeltatis. 
Flowers axillary or terminal, usually solitary, borne on pedicels 1.7-2 
cm long; bracts similar to stipules, 1 cm long, forking into 2 linear lobes 
2 mm above their base, the united portion rounded, deciduous : sepals 
5, 4-6.2 cm long, distinct to about 4 mm from the base, 3.5 mm wide, 
ensiform, acute at the apex, brownish-tomentose without and gray-tomen- 
tose within, coriaceous ; petals 5, membranaceous, 2.8 cm long, 9 mm wide, 
semi-obovate, one margin straight or slightly concave, the other strongly 
convex, traversed longitudinally by about 20 veins, occasionally forking 
or anastomosing; androgynophore 5.5 mm long, the staminodes rising 
2 cm and the stamens 1.6 cm from its apex, the filaments 11 mm long, 
the anthers hardly wider than the filaments, 5 mm long; pistil beyond 
the gynophore 2.2 cm long, the ovary 7 mm long and 6 mm in diameter, 
5-celled with numerous ovules in each cell: fruit a woody loculicidal 
capsule, 5-7 cm long, brown-tomentose, slightly acuminate at the base, 
acute at the apex, 5-angled, probably ellipsoid before dehiscence, 5-valved ; 
seeds numerous, 7 mm long, 6. mm wide, prolonged into a membranaceous 
wing 2 cm long and 8 mm wide. 
A tree 15 m high, the trunk 35 cm in diameter with rough somewhat 
scaly purplish bark, that of the ultimate branches purplish, densely 
grayish- and ferruginous-stellate-tomentose ; leaves alternate, borne on 
petioles 5-6 mm long and 1.7-2 mm in diameter, the lamina oblong to 
ovate, mostly 13-18 cm long, including an acumen 1-3 cm long, which 
is acute or nearly so and often subfalcate, 4.5-8 cm wide, the base 
usually rounded, with the petiole attached 2-8 mm within the margin, 
less often shallowly cordate, inequilateral, the margins entire or more 
or less sinuate, the upper surface glabrous or on the youngest leaves 
densely ferruginous-stellate-tomentose, the under surface densely white- 
tomentose with very numerous short ferruginous or nearly orange stellate 
hairs scattered over the entire surface; nerves at the insertion of the 
petiole 4-8, and 5-7 additional pairs of lateral veins; stipules 7-12 mm 
long, linear but attached by a broadened base, deciduous. 
Type collected at an altitude of 210 m at Sax River, District of Zamboanga, 
Mindanao, by R. S. Williams, no. 2350, in flower, February 18, 1905. Also 
