Botanical name – Sinapis arvensis Common names - Wild mustard ; Charlock ; Field mustard . Tamil name – KATTUK KATUKU ‘forest mustard’ Tender leaves are edible; Edible oil is made from seeds and this oil is also utilized in soaps and for lighting;Flowers are cooked for garnishing ; Sprouted seeds are used in sandwitches; Used in Bach flower remedies for shifting state from 'Black depression', 'Melancholia' and 'Gloom'. In photo - Tender pods of Wild mustard ; Look at a caterpiller moving towards a pod downwards at the top ! Yes this plant is a host of caterpiller !