References
Robson, N.K.B. 2002. Studies in the genus Hypericum L.( Guttiferae). 4(2). Section 9. Hypericum sensu lato (part 2): subsection 1. Hypericum series 1. Hypericum. Bull. Nat. Hist. Mus. Lond. (Bot.) 32: 61-123. Google Scholar
Robson, N.K.B. 2002. Studies in the genus Hypericum L.( Guttiferae). 4(2). Section 9. Hypericum sensu lato (part 2): subsection 1. Hypericum series 1. Hypericum. Bull. Nat. Hist. Mus. Lond. (Bot.) 32: 61-123. Google Scholar