Growth mostly in flushes; the first internodes shorter. Twigs slender, ± straight, generally purplish, terete when young, lengthwise striate, pith narrow; sometimes laxly fulvous velvety but mostly glabrous from an early stage. Terminal bud with some tips as the stipules do not completely envelop it. Leaves mostly spirally arranged, sometimes distichous. Stipules 4-11 mm long, rather wide at the base, brown and striate, leaving rather distinct scars. Petiole 2-7(-10) mm, generally dark-coloured. Blade thin-coriaceous in texture, to 10-29(-42) by (2.3-)3.3-9(-20) cm, widest about the middle to sometimes above, index (2-)2.5-4.8(-6.1); base tapering to obtuse, top acuminate; midrib and veins flat above, prominent beneath, mostly in a similar colour as the leaf surface; no domatia except in Java; primary veins fairly regular and converging within the margin, with distances between them in the order of ¾-1(-1½) cm at the midrib, smaller intermediate veins rare, secondary venation indistinct, scalariform, reticulation obscure; margin (often minutely) dentate; surfaces generally dull, and concolorous, green-brownish, midrib and veins on both sides hairy like the twigs, if so, sparsely hairy between the veins underneath but mostly glabrous. Inflorescences on the young twigs rarely also on branchlets, laxly globose to compound corymbose in shape, 1-9 cm long in all; peduncle a few mm to 3(-4½) cm long, hairy like the twig, coloured like the petioles, mostly divided into two subequal axes of about ⅓ its length; bracts c. 2-3 (if on a main axis to 10) mm long, lanceolate; number of flowers few to several dozens; pedicels to 4(-8) mm, jointed in their basal half. Sepals 2¼-5 by 1¾-4½ mm, suborbicular, elliptic or ovate, more or less fleshy, with thin margin, the outer sepals somewhat shorter and wider than the inner ones and sometimes with a cucullate top, somewhat hairy particulary in the centre. Petals 3½-7(-9) by 1¼-2 mm, widest about the middle, thin, top sometimes recurved, outside with a pale median band of hairs. Stamens consisting of a filamental tube of 0.2-0.3 part of the total length, a filamental of 0.4-0.5 part, and an anther of (0.2-)0.3-0.4 part; upper part of the filament and back of the connective between the thecae hairy, exceptionally glabrous; dorsal appendage triangular, ¼-½ the length of the thecae, ventral appendages up to half the length of the dorsal one, or wanting. Pistil hairy, ovules 6, once 3. Fruits subtended by the persistent sepals and petals, before dehiscence subglobose to slightly ovoid, the hairy style always persistent, 8-11 mm long, the valves leathery, brownish, more or less hairy, splitting straightly; seeds c. 3, c. 3-6 by 2-4 mm, dull evenly light brown.
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