References
Robson, N.K.B.. 1985. Studies in the genus Hypericum L. (Guttiferae). 3. Sections 1. Campylosporus to 6a. Umbraculoides. Bull. British Museum of Natural History (Botany) 12: 163–325 Google Scholar
Robson, N.K.B.. 1985. Studies in the genus Hypericum L. (Guttiferae). 3. Sections 1. Campylosporus to 6a. Umbraculoides. Bull. British Museum of Natural History (Botany) 12: 163–325 Google Scholar