Hugh Knott:
Hypericum elodes (Marsh St John's-wort)
Hugh Knott:
Hypericum elodes (Marsh St John's-wort)
Hugh Knott:
Hypericum perforatum (Perforate St John's-wort)
Hugh Knott:
Hypericum hirsutum (Hairy StJohn's-wort)
Hugh Knott:
Hypericum pulchrum (Slender St John's-wort)
Hugh Knott:
Hypericum pulchrum (Slender St John's-wort)
Hugh Knott:
Hypericum androsaemum (Tutsan)