DICKINSON, T. A.; HAN, S. What is Suksdorf’s hawthorn? Revision of the Western North American 20-stamen black-fruited hawthorns (Crataegus series Douglasianae, Rosaceae subtribe Malinae). Journal of the Botanical Research Institute of Texas, [S. l.], v. 17, n. 1, p. 151–189, 2023. DOI: 10.17348/jbrit.v17.i1.1292. Disponível em: https://journals.brit.org/jbrit/article/view/1292. Acesso em: 22 jul. 2024.