Pulsatilla pratensis subsp. nigricans (Störck) Zämelis in Acta Horti Bot. Univ. Latv. 1: 100. 1926
Pulsatilla pratensis subsp. nigricans in Acta Horti Bot. Univ. Latv. 1: 100. 1926
is new combination for Pulsatilla nigricans, Libell. Pulsat.: 7. 1771
Pulsatilla pratensis subsp. nigricans in Acta Horti Bot. Univ. Latv. 1: 100. 1926