Stöcklin J., Darwin and the Plants of the Galápagos-Islands, Bauhinia, 2009, 21:33-48, doi: 10.12685/bauhinia.1687
A review of the history of Galápagos flora studies, Darwin's collections, endemism and variation in island vegetation. The cactus section presents the growth forms of Brachycereus and Jasminocereus, and prickly pear variation. Brachycereus is described as a pioneer of exposed lava. The year of the paper follows the printed edition from 2009, while the later portal date refers to digital availability.