Synonyms: Boisduvalia andina; Boisduvalia concinna; Boisduvalia subulata; Boisduvalia tocornalii; Boisduvalia volckmannii; Boisduvalia volkmannii; Cratericarpium argyrophyllum; Cratericarpium subulatum; Epilobium concinnum; Megapterium argyrophyllum; Megapterium argyrophyllum var. retusifolium; Nierembergia subdentata (homotypic); Oenothera caespitosa (homotypic); Oenothera concinna; Oenothera gaurodes; Oenothera gauroides; Oenothera humifusa (heterotypic); Oenothera subulata; Oenothera uniflora (homotypic); Oenothera volkmanni