This book presents the results of pharmacognostic investigations of six antidysenteric leafy medicinally important plants of Kerala, India. These plants have also been extensively utilized in different systems like Ayurved, Unani & Vaids of medicine to treat dysentery. In addition to these, histochemical & phytochemical screenings were carried out for secondary metabolites such as tannins, saponins, anthroquinones, glycosides & alkaloids. Along with that anti-microbial activity data using common pathogenic bacteria is also furnished. The subject is divided into six major chapters to have continuity in reading like introduction, review of literature, material & methods, results & discussion etc. Several tables & figures are provided along with for a better understanding of the concept. The reader would certainly appreciate these. This book provides primary but authentic first hand information about the usages of this traditional medicinal knowledge. This information will be helpful in further studies. Also the voluminous data presented here in this book would be of immense use for the up-gradation and validation of age-old knowledge.