| Noun | 1. | Loganiaceae - a dicotyledonous family of plants of order Gentianales dicot family, magnoliopsid family - family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination Gentianales, order Gentianales - an order of dicotyledonous plants having gamopetalous flowers; Gentianaceae; Apocynaceae; Asclepiadaceae; Loganiaceae; Oleaceae; Salvadoraceae genus Logania, Logania - type genus of the Loganiaceae; Australian and New Zealand shrubs sometimes cultivated for their flowers genus Buddleia - shrubs or trees of warm regions Gelsemium, genus Gelsemium - evergreen twining shrubs of Americas and southeastern Asia |