Gustafsson, Mats H. G., Winter, Klaus, and Bittrich, Volker. 2007. "Diversity, phylogeny and classification of Clusia." In Clusia. A Woody Neotropical Genus of Remarkable Plasticity and Diversity. (Ecological Studies 194). Luttge, Ulrich, editor. 95–116. Berlin: Springer. https://doi.org/10.1007/978-3-540-37243-1.
Clusia L., with over 300 species, is one of the largest genera of the Clusiaceae (Guttiferae). According to a recent classification system (Stevens 2005), the family comprises the subfamilies Clusioideae and Kielmeyeroideae. In earlier classifications it has often also included Hypericum L. and related genera, the Hypericoideae (Engler 1925; Thorne 1976 [using the name Hypericaceae]; Cronquist 1981). There is, however, growing evidence that the Hypericoideae do not form a monophyletic group with other Clusiaceae (Gustafsson et al. 2002; Davis et al. 2005), and in, e.g., the classification system by P. F. Stevens (Stevens 2006), they are treated as a separate family, Hypericaceae. In the following, the name Clusiaceae is therefore used in the narrow sense, excluding Hypericum and its relatives.
