acanthaceous
/ˌakənˈθeɪʃəs/Botany
adjective
Of the nature of an acanthus; (in later use) specifically belonging to or characteristic of the family Acanthaceae, comprising chiefly tropical shrubs and vines and having the genus Acanthus as the type genus.
Origin
Mid 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. From post-classical Latin acanthaceus + -ous.