Yellow bee-plant (Peritoma lutea [Hook.] Raf.) is a member of family Cleomaceae, the spiderflower family (Vanderpol and Iltis 2010). Recent molecular work leaves the status of the species and its genus and family in question (e.g., Hall 2008; Iltis et al. 2011; Roalson et al. 2015), but for this review, nomenclature follows the Flora of North America (Vanderpool and Iltis 2010).