Noun | 1. | genus Myrciaria - a genus of tropical American trees and shrubs of the myrtle family dicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination jaboticaba, jaboticaba tree, Myrciaria cauliflora - small evergreen tropical tree native to Brazil and West Indies but introduced into southern United States; grown in Brazil for its edible tough-skinned purple grapelike fruit that grows all along the branches |