Derris robusta

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Local names:
Hindi (korai), Indonesian (kedusan), Thai (kheemoot (Saraburi)), Vietnamese (c[os]c k[ef]n m[aj]nh)

A tree up to 20(-25) m tall, with bole up to 30(-65) cm in diameter, tops of branches finely pubescent.

Leaflets (7-)11-31, puberulous on both surfaces when young but often glabrescent above.

Inflorescence axillary,  flowers with densely adpressed pubescent calyx and whitish or pale pink corolla, standard without basal callosities.

Fruit strap-shaped, with a wing along one side.

Ecology

In Java, D. robusta occurs in deciduous forest, especially teak forest.

Native range
Bangladesh, India, Indonesia, Myanmar, Thailand, Vietnam

Tree management

 

Seed storage behaviour is orthodox.

In Java, D. robusta occurs in deciduous forest, especially teak forest.

D. robusta can be propagated by direct sowing or using stock. The seeds germinate slowly (140-460 days).

Fodder: The leaves may serve as fodder.

Timber:  The wood of D. robusta is pale brown, with heartwood not distinctly demarcated from the sapwood.  It is hard and heavy; the density is about 850 kg/m cubic at 15% moisture content. The wood is used in India for e.g. tea chests, and locally in Java for handles of axes.

Shade or shelter: D. robusta is occasionally used as a shade tree.

Soil improver: D. robusta is occasionally used as a green manure.