babool

from The Collaborative International Dictionary of English v.0.48

Babul \Ba*bul"\, Babool \Ba*bool"\, n. [See {Bablah}.] (Bot.)
   Any one of several species of {Acacia}, esp. {Acacia
   Arabica}, which yelds a gum used as a substitute for true gum
   arabic.
   [1913 Webster]

         In place of Putney's golden gorse
         The sickly babul blooms.                 --Kipling.
   [Webster 1913 Suppl.]