Synonyms: Dipteracanthus matutinus; Dipteracanthus ocymoides; Dipteracanthus pallidus; Dipteracanthus patulus (homotypic); Dipteracanthus sudanicus; Petalidium patulum (homotypic); Ruellia aromatica (homotypic); Ruellia axillaris (heterotypic); Ruellia bracteophylla; Ruellia concavifolia; Ruellia erecta; Ruellia gongodes; Ruellia huttonii; Ruellia ibbensis; Ruellia matutina (homotypic); Ruellia ocymoides; Ruellia ovata (heterotypic); Ruellia pallida (heterotypic); Ruellia patula var. dumicola; Ruellia patula var. erythraea; Ruellia socotrana; Ruellia sokotrana; Ruellia sudanica