Pharmacognostic, Phytochemical and Physicochemical Investigations of Hypericum hookerianum Wight & Arn. (Hypericaceae) of Palni Hills, India, M, Mahendrakumar, S Nirmalraj, M Ravikumar, B Bharath, S Seeni, and K Perinbam , Pharmacognosy Journal, September 2017, Volume 9, Issue 6, p.750-756, (2017)