BREEDEN, C. Noteworthy collection of Cypripedium reginae (Orchidaceae) in Tennessee, U.S.A. Journal of the Botanical Research Institute of Texas, [S. l.], v. 12, n. 2, p. 707–711, 2018. DOI: 10.17348/jbrit.v12.i2.973. Disponível em: https://journals.brit.org/jbrit/article/view/973. Acesso em: 31 jan. 2023.