Sacred groves are a very ancient and widespread phenomenon in the old-world cultures, which are small patches of native vegetation traditionally been protected on the grounds of religious faith. Sacred groves have existed in India from the time immemorial as patches of densely wooded areas, venerated on religious grounds. Sacred groves have preserved many rare and endemic wild plant species, many of which hold potential benefit to man in medicine, agriculture and industry. The present work was carried out in Mankara Sacred Grove, Palakkad district, Kerala. Geographically the place lies between 10˚45′0″ N latitude and 76˚26′0″ E longitudes. About 114 plant species belonging to 54 families were collected from here. Plants were enumerated with botanical names, family, habit and local names. It includes 36Trees, 26 Shrubs, 41 Herbs, 2 Creeper and 10 Climbers. The collected plants were preserved as herbarium. Ethnic cultural practices in the sacred groves are also mentioned in this paper.