Rubeola linearifolia Rubeola angustifolia Crucianella angustifolia var. chabertii Crucianella angustifolia f. plagiotropica Crucianella chabertii Crucianella mucronata Crucianella spicata Crucianella angustifolia subsp. oxyloba Crucianella angustifolia f. desenspicata Crucianella oxyloba Crucianella angustifolia subvar. confinis
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024