THE TYPE COLLECTION OF THE W. P. FRASER HERBARIUM (SASK) OF THE UNIVERSITY OF SASKATCHEWAN. POLIBOTÁNICA, [S. l.], n. 17, p. 131–138, 2004. Disponível em: https://polibotanica.mx/index.php/polibotanica/article/view/693. Acesso em: 29 apr. 2025.