Abstract: Leaf epidermal micro-morphology of four-fuel wood yielding tree legumes viz., Albizia lebbeck Benth, Cassia fistula Linn, Acacia nilotica Willd and Tamarindus indica Linn has been investigated. The epidermal cells in each case were irregular in shape, being larger in slow growing species i.e. A. nilotica and T. indica. The stomata were hypostomatic, anomocytic and /or paracytic types with frequency, size and stomatal index higher in fast growing species i.e. C. fistula and A. lebbeck. The trichomes present only in fast growing species, were glandular or non-glandular, unicellular, straight or curved. These leaf epidermal characters can also be utilized as markers for fast growing fuel wood plants apart from taxonomical consideration of the taxa.