I investigated medicinal plant through photographing at Royal Botanical Garden, Seethawaka Botanical Garden and Henarathgoda Botanical Garden in Sri Lanka. From the 3 botanical gardens 245 species in 77 family of plants were investigated. The most cultivated plant family in the 3 places was Leguminosae, followed by Euphorbiaceae, Malvaceae, Rutaceae, Rubiaceae, Acanthaceae, Compositae and Lamiaceae. Abrus precatorius, Cissus quadrangularis, Erythroxylum moonii and Plumbago indica were found in the 3 places in common.