Coscinium blumeanum Miers

Large liana. Branchlets terete, obscurely ridged or smooth, pale fawn to brownish at first, later glabrescent and whitish, bearing prominent disciform petiole-scars. Leaves: petioles whitish tomentose, 6-20 cm, conspicuously swollen at both ends, insert-ed 1.5-5 cm from basal margin of lamina; lamina oblong, lanceolate-oblong or narrowly ovate, occasionally subpanduriform, base broadly rounded or truncate, apex acuminate, 15-35 by 6-20 cm, above glabrous, often drying ± bullate, beneath whitish tomentellous with fine reticulation visible, palmately 7-11-nerved at base with 2-3 pairs of distal lateral nerves, thinly coriaceous. Inflorescences: flowers in globose (or slightly elongate) densely and--flowered heads 10-13 mm ø on peduncles 10-25 mm arranged in a raceme 12-14 mm, supra-axillary or arising from older leafless stems, axis and branches of inflorescence stout and brown tomentose, bracts inconspicuous, scale-like, 1-2 mm long. Male flowers with pedicels 1.5-2 mm; sepals densely sericeous-pilose externally, glabrous within, inner 3-6 spreading at anthesis, broadly elliptic to spathulate-oboVate, 2.5-3 mm long, the outermost 3 elliptic, 1.5-2 mm long, inserted lower; stamens 6, 1 mm long. Female flowers: 6 larger inner sepals oblong to oblanceolate, 4-4.5 mm long, staminodes 6, carpels 3 as in C. fenestratum. Drupes unknown.

In Peninsular Thailand recorded from evergreen forest at c. 300 m, and on Terutao I. at 15 m.

CAUTION The yellow tubers are eaten.