Trachyspermum roxburghianum (also known as Carum roxburghianum) is a flowering plant in the family Apiaceae. It is grown extensively in the South Asia, Southeast Asia, and Indonesia. Its aromatic dried fruits, like its close relative ajwain, are often used in Bengali cuisine but are rarely used in the rest of India. The fresh leaves are used as an herb in Thailand and it is used medicinally in Myanmar.The small dried fruits, mistakenly referred to as seeds, are similar in appearance to those of ajwain, celery, and caraway. Because of their similarity in both appearance and flavor, it is often confused or substituted with celery seed.Radhuni, as it's known in Bengali, is often confused with celery and is known as wild celery in English. It is known as ajmod in Hindi from which the name for ajwain is also derived. It is also known as kant-balu in Burmese, and phak chi lom in Thai although this name may also refer to a variety of celery.