OploniaOplonia is a genus of plants in the family Acanthaceae. It includes 21 species native to western South America, the Caribbean, and Madagascar.Species21 species are accepted.Oplonia acicularis Oplonia acuminata Oplonia acunae Oplonia armata Oplonia cubensis Oplonia grandiflora Oplonia hutchisonii Oplonia jamaicensis Oplonia jujuyensis Oplonia linifolia Oplonia microphylla Oplonia minor Oplonia moana Oplonia multigemma Oplonia nannophylla Oplonia polyece Oplonia puberula Oplonia purpurascens Oplonia spinosa Oplonia tetrasticha ''Oplonia vincoides''