Botanical Name - Trachyspermum ammi Category - Spices/Medicinal Form - Dry Part Used - Seeds General Information - Ajwain (Trachyspermum ammi L. Sprague) is an annual aromatic and herbaceous plant of the family Apiaceae. It is an erect annual herb with a striate stem and originated in the eastern regions of Persia and India. Its fruits are small, and grayish-brown in color. Ajwain has several other common names in English, including carom, Ethiopian cumin, wild parsley, and bishop;s weed.