BSI Flora of India with details & keys (Volume 3- 1993) (S.N. Biswas): Cratoxylum Blume Hypericum L. Section 1. Adenosepalum Spach Section 2. Ascyreia Choisy Section 3. Brathys (Mutis ex L.f.) Choisy Subsection 1. Brathys Subsection 2. Spachium R. Keller Section 4. Hypericum Triadenum Rafin.
