Arenaria digyna Willd. ex Schltdl. Arenaria digyna Willd. ex Schltdl. in Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 7: 201. 1813 sec. The Plant List 2013=Arenaria serpens var. orizabae Rohrb. in Linnaea 37: 371. 1872 syn. sec. ???