Ramachandran, A.; Soosairaj, S.; Jayakumar, S. Distribution and Description of <I>Indigofera trita< I> L.F. Spp. <I>Subulata< I> (Vahl Ex Poir) Ali - A Rare Plant in the Kolli Hill of Tamil Nadu. Indian Forester 2006, 132, 507-508.