Black kokum (wild mangosteen) is native to south India. It has a slightly sweet and sour aroma and imparts a refreshing sour taste, similar to tamarind. Kokum can be used to enhance coconut-based curries, especially fish curries or vegetable dishes such as Okra or Dal.
Coriander seed, which are actually the dried fruit of the coriander plant, is used as a spice. Typically used ground, coriander seed has a spicy, citrus flavor. Coriander seed is used extensively in Indian, Middle Eastern and Asian cuisines. Whole coriander seed is sometimes used in pickling and brining.