Shrub or tree, (6-)20-40 m, up to 80 cm Ø; bark and young leaves bitter. Leaves (l-)2(-3)-pinnate, 12-35(-80) cm, leaflets usually elliptic to oblong, rarely somewhat obovate or lanceolate, shorter or longer acuminate, 4-12(-15) by 2-6(-9) cm, at base underneath mostly with a gland-field, at apex with some scattered glands. Thyrses 8-40 cm, rather open, terminal, ∞ flowered, glabrous. Flowers not rarely fragrant. Calyx(1-) 1¼-2½ cm long, mostly 2-lobed, sometimes 1-or more-lobed; glands few or distinct. Corolla 5-6 cm long (incl. lobes), pink or white, usually with yellow streaks in the mouth, above the basal tube rather suddenly widened, campanulate upper tube towards apex almost always short-capitate glandular hairy, and lobes ciliate. Filaments densely capitate-glandular hairy at insertion. Style 2½-3 cm. Capsule 15-60 cm long, 5-8 mm ø; septum 4 mm ø. Seeds 8-13 by 2-4 mm.
Primary and secondary forests, also in areas subject to a dry monsoon, and in East Java in teak forest, very common on Mt Telemojo and near Pringombo (Banjumas) (KOORDERS, l.c.).from the lowland up to c. 1600 m. Fl. Jan.-Dec.; fr. Jan.-Dec. Not rarely a pioneer in secondary forest, cuttings sometimes used for strengthening terracing on unstable slopes. Early flowering and fruiting as a shrub.
Uses. Sometimes cultivated; also suitable for re-afforestation. Timber is said to be strong and durable, locally used for bridges and houses, but not resistent against termites, and therefore of less value for outdoor constructions; used for making matches and matchboxes (HEYNE, l.c.).
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