Kiesling R., Catrix J. R., Tessier F., Schweich D., Typification of Opuntia australis (Cactaceae) with an original plate from 1882 and history of the plant’s finding, Boletín de la Sociedad Argentina de Botánica, 2021, 56(1):45-54, doi: 10.31055/1851.2372.v56.n1.30584
The history of the discovery of Pterocactus australis during the voyage of Le Volage in 1882. Analysis of Weber's notes, Heimsch's drawing and herbarium specimens leads to the designation of a neotype and an epitype for the name Opuntia australis. The paper also includes information on habitats and spine variation.