Synonyms: Acacia odorattissima Willd., Mimos odorattissima L.
Hindi: Kala siris
Tamil: Karuvakai, Sittilavakai
It is a medium-sized tree and is distributed throughout India, it is drought resistant, and commonly grown in tropical and subtropical areas. It is an unarmed tree, about 20 m in height with dark-colored young shoots and grey, rough, and irregularly cracked barks. Leaves are abruptly pinnate, alternately arranged, the main rachis with a gland on the top side near its base part, at the base of the first two pairs of the pinnae, leaflets are unequal, rounded or semi cordate at the base, obtuse or rounded at the apex, dark green, slightly pubescent above. The flowers are white, aromatic, sessile, many in small globose 5 to 10 or more flowered heads, spreading panicles. Fruits are shortly stalked pods, brown, and slightly reticulate veined. Calyx 1.25 mm long, pubescent; corolla white, 4 mm long, grey silky outside. Stamens twice as long as the corolla; filaments pale yellow, connate at the base into a tube half as long as the corolla tube. Seeds flat, yellow.
Useful plant parts: Bark, root, wood, leaves
Medicinal uses: To treat ulcers, leprosy, skin diseases, bronchitis, and burning sensation.
Stem: dark brown insoluble gum in the form of rounded tears; heartwood:
d-O-penta-methyl-dihydromelanoxetin; seed: two triterpenic acids, machacrinic acid.
Bark is Astringent, Antidermatic, Antidiabetic and Expectorant
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