ANTIDESMA, in botany, a genus of the dioecia pentandria class. The calix of the male consists of 5 leaves; it has no corolla: The calix of the female is entire, gaping a little on one side; it has no corolla, but two stili, and a double valved capsule inclosed in the calix. There is but one species of the antidesma, viz. the alexetria, a native of India.