New drug discoveries have shifted attention from synthetic models and compounds to natural products of plants origin. This is because scientists now believe that drug leads\hit molecule discovery would be more probable in plant and other natural sources like marine and animals which are yet to be fully explored. This drift has promoted, in recent time, researches in plants considered to be of little or no economic or ecological significance (Ibrahim et al., 2010). Naringi crenulata is a member of Rutaceae family Naringi crenulata (Roxb.) Nicols. (Tamil-Mahavilvam) tree of 8-12m tall; trunk with branched thorns; bark dark grey, smooth; blaze yellowish; young branchlets terete, glabrous, thorny; leaves compound, imparipinnate to 15cm long, alternate, rachis with oblonceolate wings, leaflets 5-9, opposite, sessile, elliptic-obovate, apex emarginated or obtuse, base acute, margin crenulate or irregularly serrulate, glandular, glabrous; Flowers in axillary recemose, white, fragrant flowers, Fruit globose berry, 1-4 seeded (Gamble 1935, Sald. & Nicols.1976, Sasidharan 2004, Saldanha 1996). All parts of this tree viz. root, stem, bark, leaf and fruit are used in several ailments. Root is used as remedy for cobrabite Sekhar et al 2011) bodypain (Chiranjibi Pattanaik 2008), colic (Senthil Kumar 2006), vomiting and dysentery (Ramachandran 2010). Stem powder prevents acne and anti aging (Mayuree Kanlayavattanakul 2009). Bark is used as a remedy for puerperal fever (Prayaga murty 2010) and pitta (Ramalingam Ramani 2010). Leaves are used for curing dysentery (Prayaga murty 2010) and epilepsy (Ramalingam Ramani 2010).
The present paper deals with the standardization of leaves on the basis of various Pharmacognostic parameters and the determination of these characters will aid future investigators in their Pharmacological analysis of this species.