Status of Endangered and Threatened Sand Area Species of the Illinois Flora. Illinois Natural History Survey Bulletin, Champaign, IL, v. 39, n. 1-6, p. 259–296, 2011. DOI: 10.21900/j.inhs.v39.103. Disponível em: https://iopn.library.illinois.edu/journals/inhs/article/view/103.. Acesso em: 19 may. 2024.