Galium × carmineum explained

Galium × carmineum, common name carmine bedstraw, is a species of the Rubiaceae.^[1] It is apparently of hybrid origin though established in the wild, a 3-way cross between G. anisophyllon × G. pumilum × G. rubrum. It is native to mountainous regions of France, Switzerland and Italy (Lombardia, Trentino-Alto Adige, Veneto, Emilia-Romagna, Toscana).^{[2] [3]}

Notes and References

1. Beauverd, Gustave. 1937. Bulletin de la Société Botanique de Genève, Sér. 2 27: 92.
2. http://apps.kew.org/wcsp/namedetail.do?name_id=85981 Kew World Checklist of Selected Plant Families, Galium × carmineum
3. http://luirig.altervista.org/flora/taxa/index1.php?scientific-name=galium+carmineum Altervista Flora Italiana, Galium × carmineum