Pharmacognostic Studies of the Leaves of Hyptis Suaveolens Linn. (Labiatae) (Poit), Okonta, Eleje Oboma, Onyekere Peculiar Feenna, Ugwu Patience Ngozi, Udodeme Helen Ogechukwu, Chukwube Vincent Obisike, Odoh Uchenna Estella, and Ezugwu Christopher Obodike , Pharmacognosy Journal, May 2021, Volume 13, Issue 3, p.698-705, (2021)