SZELĄG, Z.

Hieracium umbellonigritum (Asteraceae), a new hybridogenous species from the Sudetes in Poland

. Phytotaxa, Auckland, New Zealand, v. 589, n. 3, p. 289–292, 2023. DOI: 10.11646/phytotaxa.589.3.8. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.589.3.8. Acesso em: 6 dec. 2025.