Acacia catechu L. F. Wilid. 

Kaippu
Synonyms: Acacia wallichiana
Vernacular Name:inhala: Kaippu; Eng: Cutch tree
Description: A maderate sized deciduous tree, 9-12 m in height with dark grayish or brown rough bark and hooked short spines, leaves bipinnately compound, leaflets 30-50 pairs, main rachis pubescent with a large conspicuous near the middle of the rachi; flowers pale yellow, sessile in pedi.mcled spikes; fruits flat brown pods, shiny and with a
triangular beak at the apex and narrowed at the base; seeds 3-10 per pod.
Propagation: By seeds.
Part Used: Bark and heartwood
Chemical Constituents: The chief constituents of the heartwood are catechin and catechutannic acid. The wood contains epicatechin, Afzelchin, catechin tetramer, dicatechin, gallochin, gossypetin, isorhamnetin, kaempferol.
Uses: Bark: astringent, useful in passive diarrhoea either alone or in combination with cinnamon or opium, decoction given internally in leprosy; heartwood: the concentrated aqueous exteact known as khayer gum or leprosy; cutch is astringent, cooling and digestive, beneficial in cough and diarrhoea, applied exterrnally to ulcers, boils and eruptions of the skin.