Dumaw, K. E., Pryer, K. M., Windham, M. D., & Hay, N. M. (2025). Herbarium specimens reveal a significantly earlier flowering trend for Cypripedium acaule (Orchidaceae) in North Carolina (U.S.A.). Journal of the Botanical Research Institute of Texas, 19(3), 211–221. https://doi.org/10.17348/jbrit.v19.i3.1424