Occurrence (Special Areas) : Indroda Park, Ayurvedic Udyan, Van Chetana Kendra, Sarita Udyan, Infocity, Basan, Aranya Van
About Acacia nilotica Plant :
Habit : A medium-sized almost evergreen tree, straight or crooked, armed tree with dark-blackish-brown, irregularly, longitudinally fissured bark.
Stem : Woody but upper portion herbaceous,aerial, erect, branched, solid, dark brown bark; a gum is secreted from the bark, gum Arabica.
Leaves : Ramal and cauline, alternate, stipulate, stipules modified into ½ to 2" long straight, white thorns, petiolate, compound, bipinnate and paripinnate, pinnae 5-7 pairs, pinnules 10-20 pairs, sessile or subsessile, minute, ovate or oblong, entire, unicostate reticulate.
Inflorescence : Axillary cymose head.
Flowers tiny, clustered together in bright-yellow, round heads.
Bracteate, ebracteolate, sessile or subsessile, complete, actinomorphic, hermaphrodite, hypogynous, pentamerous, yellow, very small.
Calyx made up of 4 to 5 sepals, gamosepalous, campanulate, odd sepal anterior, valvate, minute in size.
Corolla made up of 4 or 5 petals, gamopetalous, tubular, about double the size of the calyx, valvate, yellow.
Androecium consists of many stamens, polyandrous, filaments filiform, longer than corolla, dithecous, basifixed, introrse, yellow.
Gynoecium is monocarpellary, superior, unilocular, ovules many, marginal placentation, shortly stalked ovary, style long, stigma flat and minute.