in botany: A genus of plants of the clas of diandria, and order of monogynia; and in the natural system arranged under the 24th order, Corycidae. The calyx is ringent, with a nectarium resembling a spur; the corolla diphyllous and equal; the capsule unilocular. There are nine species; two of which are natives of Britain. They have been applied to no particular use.