Comparative Powder Microscopic and HPTLC Studies on Stem barks of Symplocos racemosa Roxb. and Symplocos crataegoides Ham, Govindarajan, Nartunai, Cheekala Uma Maheswara, Arcot Shantha, Sundaramoorthy Susikumar, Shanmugam Murugammal, Duraisamy Ramasamy, Cheemalapati Venkata Narasimhaj, and Raju Ilavarasan , Pharmacognosy Journal, June/2016, Volume 8, Issue 4, p.346-351, (2016)