Tarenna costata Merr., Phil. J. Sci. 17 (1920)

Latin for 'with clear mid-vein'.

Stylocoryna costata Miq.
Webera costata (Miq.) Boerl. [Illegitimate]
Webera costata (Miq.) Hook.f.

Sub-canopy tree up to 26 m tall and 31 cm dbh. Stipules ca. 6 mm long, triangular. Leaves opposite, simple, penni-veined, hairy. Flowers ca. 14 mm diameter, white-yellow, with corolla tube, placed in panicles. Fruits ca. 5 mm diameter, greenish, berries.

In undisturbed mixed dipterocarp, keranga and sub-montane forests up to 1700 m altitude. On hillsides and ridges with sandy to clay soils. In secondary forests usually present as a pre-disturbance remnant.

Thailand, Peninsiular Malaysia, Sumatra, Borneo (Sarawak, Sabah, East-Kalimantan).

Local names
Borneo: Bangkal, Pelajau.