Dyera costulata is a large deciduous tree up to 60 m tall with diameters up to 2-3 m. It has a straight and clear bole up to 15-20 m, without buttresses. The leaves are in whorls and the trees are briefly and rather irregular deciduous.
The tiny white flowers open at night and fall off the next morning. The fruits are paired, wood tubes that split along one side when ripe, releasing that flattened, winged , wind-dispersed seeds.
The milky, latex-like substance produced by Dyera costulata and used by the indigenous people as a substitute for bungs, found in small but important place in modern industry.
It was used in the manufacture of chewing gum in the USA, for water fabrics and for mixing worth gutta-percha for electrical insulation.
The tree of Dyera costulata
