Acacia leiocalyx (Black Wattle, Early Flowering Black Wattle, Lamb's Tail Wattle, Curracabah) grows in Queensland, Australia and as far south as Sydney in N.S.W. It is widespread and common in eucalypt woodlands, especially on well-drained, shallow soils.
The vegetation of Tower Hill was originally a diverse collection of Manna Gum, Blackwood, Black Wattle, Swamp Gum and Drooping Sheoak.
This natural area is threatened by pollution as well as by invasive alien weeds such as Kikuyu grass and the Black Wattle tree.
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According to the draft ecological plan, floral species such as Indian almond, black wattle, sacred fig, madras thorn, Indian mulberry, neem, banyan, magizham, Indian cork tree, punnai, sirukkambil, karumugai, shenbagam, bayur tree, kadamba, pavazha malli, vetiver grass, palmorasa, agave, lemon grass and subabul would be part of species along the nature trail which would play a role in erosion management.
From 1948 through the 1960s the Tamil Nadu Forest Department planted large areas of indigenous grasslands along the road with black wattle for producing tanning agents for use in the leather industry.