Galium circaezans var. montanum Galium rotundifolium var. circaezans Galium circaeoides Galium circaezans var. glabellum Galium circaezans var. glabrum Galium circaezans var. hypomalacum Galium circaezans var. circaezans Galium circaezans var. typicum Galium boreale Galium brachiatum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024