Bello, A. O., Boatwright, J. S., Bank, M. V. D., & Magee, A. R. (2026). The Cape Gum-bushes: a taxonomic revision of Pteronia (Astereae, Asteraceae). Phytotaxa, 764(1), 1–168. https://doi.org/10.11646/phytotaxa.764.1.1