Rinorea longiracemosa (Kurz) Craib

Growth apparently in flushes, internodes of largely similar length. Twigs when young furrowed and more or less puberulous; branchlets somewhat crooked, the bark brownish or greyish, sometimes dull purplish, corky with faint longitudinal ribs, pith narrow. Leaves mostly distichous. Stipules with broad base, (2-)4-14(-21) mm long, striate, more or less closely appressed, often late caducous. Petiole 2-10 mm. Blade firmly thin-coriaceous, to (3¾-)8-18(-22) by (1¾-)2½-5½(-7½) cm, widest about the middle, index 2.3-3.4(-4); base blunt to acute, top acuminate; midrib narrow, prominent on both sides, major veins about 6-11 (-14) on either side, converging within the margins, their axils mostly with hairy domatia (not in North Borneo), secondary veins and reticulation lax and rather irregular; margin with small roundish teeth; surfaces dull, olive-green to brownish, with a greyish aspect, mostly somewhat lighter beneath, glabrous but sometimes the midrib above sparsely pubescent, rarely pilose on the veins beneath, too. Inflorescences axillary (sometimes the subtending leaf gone), on the mainland of Asia and in Sabang generally a simple, rather densely-flowered raceme to 9 cm long 1½ cm wide, initially resembling a cone due to the conspicuous bracts which are persistent, in Borneo and Java a lax-flowered panicle to 10 cm long, 3½ cm wide, with an occasional leaf or only stipules subtending the first branches, the bracts less conspicuous, and caducous; axes sometimes puberulous, bracts 2-3 mm, striate, pedicels 2-4(-6) mm, jointed in the basal or apical part. Flower when young conical, the calyx covering the basal half. Sepals thin, (sub)equal, more or less triangular, surface glabrous or pubescent, margin ciliate. Petals thin, straight, (2½-)3½-4(-5½) by 1-3 mm, glabrous, sometimes sparsely ciliate. Androecium consisting of a filamental tube 0.1-0.3 part of the total length, filaments 0.1-0.4 part, mostly glabrous, anthers 0.5-0.6 part, bearded at the base, the dorsal appendage broad, triangular, nearly as long as the thecae or somewhat longer, ventral appendages nearly reaching the top of the dorsal one. Ovary mostly glabrous, sometimes sparsely hairy, style glabrous, ovules 6. Fruit in Asia (few known) globose before dehiscence, 1¼-1½ cm ø with seeds subglobose 4 mm ø, in Borneo (well-known) on woody stalk, glabrous, before dehiscence 3-sided with blunt corners, 2¾-4 cm long, 2½ cm wide, the base not or scarcely narrowed, valves leathery, veined, mostly 2-layered after dehiscence, with woody back; the seeds obconical, c. 8 mm long, 7 mm ø. Seeds to 6 in number, with a circular depression at the place of insertion, and evenly straw-coloured.

Mostly primary forest, but also from secondary, bamboo and swampy forest and forest edges, on clayey or loamy soil, also from limestone and basalt, often by streams mostly at low altitude but in Hainan from 1000 m.In the monsoon area generally at least partly deciduous, the fresh leaves then cropping out at flowering time.