White leaf (Forst. Nov. Gen.): A genus of the monogynia order, belonging to the pentandra clas of plants. The capsule is trilocular; the nectarium is pyramidal, pentagonal, and the length of the corolla. There is but one species, the nitidum or glossy, a native of New Caledonia. This genus has great affinity with the ivy; but differs in the nectarium, and perhaps in the fruit.