Gonystylus borneensis Gilg

Shrub or tree, trunk up to 60 cm diam. Twigs blackish. Leaves elliptic to oblong, sometimes slightly oblanceolate or panduriform, 12-24 by 4½-7½ cm, base ± cuneate, rarely almost rounded, apex shortly cuspidate-acuminate, rather thinly chartaceous, dull pale brownish when dry, glabrous except for the sometimes thinly puberulous midrib below; nervation very fine, dense andparallel; midrib shallowly channelled above or almost flat; petiole 8-12 by 2 mm, puberulous. Inflorescences 10-20 cm long (only 1-5 cm in the type, but doubtless not properly developed), subsimple, thinly adpressed-pubescent. Pedicels 1-1½ cm, densely fulvo-velutinous. Calyx 7-8 mm long, velutinous; sepals 5-6 mm long, ovate-lanceolate, subacute. Petals 25-30, subulate, glabrous, epustulate. Style glabrous. Fruit up to 7 cm diam.

Rain-forest, prob. at low altitudes; fl.--05, fr. Oct.-March. According to a MS. note by BECCARI (in herb. Becc), the flowers open for a very short time only and are difficult to find in this state.

Can be grown by seedlings.