Smyrnium perfoliatum subsp. rotundifolium (Mill.) Bonnier & Layens, Tabl. Syn. Pl. Vasc. France: 135. 1894
Smyrnium perfoliatum subsp. rotundifolium, Tabl. Syn. Pl. Vasc. France: 135. 1894
is new combination for Smyrnium rotundifolium, Gard. Dict., ed. 8: no. 2. 1768
Smyrnium perfoliatum subsp. rotundifolium, Tabl. Syn. Pl. Vasc. France: 135. 1894