Dysoxylum excelsum Blume, Bijdr. (1825)
Latin for 'large or tall'.

Synonyms
Alliaria procera (Hiern) Kuntze, Azedarach nigra Noronha, Dysoxylum altissimum Merr., Dysoxylum arnoldianum K.Schum., Dysoxylum excelsum var. hasseltii Miq., Dysoxylum excelsum var. genuinum Koord. & Valet., Dysoxylum excelsum var. parvifolium Koord. & Valet., Dysoxylum excelsum var. pedicellatum Koord. & Valet., Dysoxylum gobara (Buch.-Ham.) Merr., Dysoxylum hasseltii (Miq.) Koord. & Valet., Dysoxylum havilandii Ridl., Dysoxylum huberti Harms, Dysoxylum macgregorii C.DC., Dysoxylum microbotrys King, Dysoxylum motleyanum (C.DC.) Ridl., Dysoxylum pallidum Merr., Dysoxylum peerisiae Kosterm., Dysoxylum procerum Hiern, Dysoxylum procerum var. integrum C.DC., Dysoxylum procerum var. macranthum C.DC., Dysoxylum procerum var. motleyanum C.DC., Dysoxylum turbinatum King, Epicharis dubiosa Span. ex Miq., Epicharis procera (Hiern) Pierre, Guarea acuminata Wall., Guarea disyphonia Griff., Guarea gobara [Aiken] Buch.-Ham., Guarea procera Wall., Guarea oblonga Wall., Hartighsea excelsa (Blume) A.Juss., Hartighsea gobara Wight & Arn., Macrocheton excelsum (Blume) M.Roem., Trichilia excelsa Spreng.

Description
Mid-canopy tree up to 32 m tall and 59 cm dbh. Stipules absent. Leaves alternate, compound, leaflets penni-veined, glabrous to hairy. Flowers ca. 16 mm diameter, white-creamish, placed in racemes or panicles. Fruits ca. 33 mm diameter, pinkish-orange, fleshy, dehiscent capsules.

Ecology
In undisturbed mixed dipterocarp to sub-montane forests up to 1100 m altitude. On alluvial sites near or along rivers and streams. On sandy to clay soils. In secondary forests usually present as a pre-disturbance remnant.

Uses
The wood is locally used for planks and general construction work.

Distribution
From Sri Lanka and India to South China to New Guinea and the Solomon Islands. In Borneo collected in Sarawak, Sabah, West- and East-Kalimantan.

Local names in Borneo
Durong, Plukrak.