Flora 55: 354 (1872). Type: France, Poitiers, Ligugé, 1872, M. Weddell (H-Nyl 27208 - lectotype; H-Nyl 27211, H-Nyl 27271 - isolectotypes). Lectotypified by Guderley (1999: 222). Coordinates: 46°31'2"N, 0°19'52"O.
Coordinates: 46°31'2"N, 0°19'52"O.