Humboldtia bourdilloni Prain

Trees, to 15 m high, bark reddish-brown, smooth; branchlets solid, glabrous. Leaves paripinnate, alternate; stipules lateral, ovate, acute, prominently veined, glabrous, appendages falcate, rounded, veined, persistent; rachis 10-12 cm long, pulvinate, obcordately winged between leaflets, glabrous; leaflets 6-12, opposite, estipellate, when lowest pair absent, a joint corresponding to its position present; petiolule 3-5 mm, stout, glabrous; lamina 7.5-25 x 1.5-6 cm, oblong-lanceolate or linear-lanceolate, base unequal or obtuse, margin entire, glabrous, chartaceous; lateral nerves 7-10 pairs, pinnate, arched, prominent, intercostae reticulate, prominent. Flowers bisexual, 7 mm long, pinkish, in corymbs on tubercles on stem and old branches, tawny velvety; pedicels 1.4-1.7 cm long, brown velvety; bracts ovate, acute, densely brown tomentose on both surface, fugacious; bracteoles 2, connate almost throughout when young, ovate-oblong, obtuse or rounded at apex, densely brown tomentose on both surface, gland present towards apex without, fugacious; calyx tube 1.4 cm long, obconical, brown tomentose, lined by the disc, persistent; lobes 4, subequal, crimson, imbricate; petals 5, white with pink veins, 3 longer and 2 shorter, clawed, obovate, obtuse to rounded at apex, sparsely pilose within, glabrous with out, sometimes a brown gland present in the middle within, fugacious; stamens 5, free, alternating with 5 minute staminodes; filaments broad at base, pilose; anthers versatile, shortly apiculate at one end; ovary half inferior, stipitate, obliquely oblong, densely pilose; ovules 4-6; style filiform, long, pilose; stigma capitate. Fruit a pod 8-11 x 2-2.5 cm, flat, oblong, velvety brown pubescent, bright red or crimson, dehiscent; sutures thick, valves prominently veined; seeds 3-5.