Gossypianthus in Icon. Pl. 3: 251. 1840 sec. Clemants (2003)
Close relationships between Gossypianthus Hook. and Guilleminea Kunth and a merger of both genera were long-disputed (Mears 1967; Eliasson 1988). Phylogenetic analysis of plastid (Sánchez del-Pino & al. 2009) and nuclear sequences (Ortuño & Borsch, unpubl. data) show that they are more distantly related and do not form sister groups.