Heteroblemma decurrens (Cogn.) Cámara-Leret, Ridd.- Num. & Veldk. 2013

Cámara-Leret, R., Ridder-Numan, J. W. A. & Veldkamp, J. F., 2013, Revision of Heteroblemma gen. nov. (Dissochaeteae - Melastomataceae) from Malesia and Vietnam, Blumea 58 (3), pp. 229-240 : 237-238

8. Heteroblemma decurrens (Cogn.) Cámara-Leret, Ridd.- Num. & Veldk. , comb. nov.

Medinilla decurrens Cogn. in A.DC., Mon. Phan. 7 (1891) 591. — Type: Beccari PB 4016 (holo FI; BR).

Innovations glabrescent. Branchlets striate, glabrous, up to 10 mm diam. Petioles winged, 5–18.5 cm by 2–4 mm, glabrous (rarely pilose). Leaves elliptic to lanceolate, 10–31 by 9–17 cm, 2–3.4 times as long as wide, 1.5–2.8 times as long as the petioles, base decurrent, margin laxly serrulate, ciliolate, apex acuminate, pergamentaceous (i.s.), underneath glabrous (rarely pilose), 5–7-plinerved, basal acrodromous, first pair of primaries 5 –15 mm away from the base, distalmost primaries 10– 30 mm away from the preceding pair, submarginal vein conspicuous, secondary nerves conspicuous, 25 pairs, angle of divergence from midvein acute wide, tertiary nerves conspicuous. Bracts 0.5–1.5 mm long. Flowers born in dense fascicles on old wood, pedicels 10–15 mm long, pale red, glabrous. Mature floral buds 8–9 by 3–4 mm. Hypanthium urceolate to campanulate, 3 mm long, orange or pale red, glabrous (rarely pilose). Sepals 0.5 mm long, teeth absent, glabrous. Petals 6–7 mm long, yellow or pink, outside finely papillose. Filaments 2–3.5 mm long. Anthers 4–5 mm long, creamy, lateral appendages not recurved, 0.25 mm long, dorsal spur triangular to lanceolate, 1–2 mm long. Style 5–6 mm long, creamy or white, stigma white. Fruit 5–7 by 4–6 mm, pale yellow to orange, smooth, glabrous, calyx teeth inconspicuous or absent; pedicels in fruit 15– 40 mm long, green, glabrous; inside filled with jelly, seeds c. 1 mm long, yellow (i.s.).

Distribution — Malaysia: Sarawak, Brunei (Temburong Distr.: Kuala Belalong).

Habitat — Clay rich alluvium along streams, river bank, in occasionally flooded riverine forest, 25–950 m altitude.

Collector’s notes — Climber, reportedly up to 10 m high, stem naked except for the top 1.5 m, greyish, mid-brown, chocolate brown. Petiole proximally tinged brown. Leaves when young pinkish (green), later above deep green, beneath paler, drill purple. Flowers cauliflorous. Peduncles pale green, green. Pedicel pale red; hypanthium pale red, orange. Petals pink; pale yellow to yellow flowers as noted for S. 22818 (Jugah ak. Kudi) and Chew Wee-Lek 346 are extremely exceptional in the alliance. Filaments white, anthers cream. Style creamy, white; stigma white. Fruits pale yellow, orange; pedicel green, pale orange

Note — 13 collections were seen.