Claim: There are at least three species of Jovellana (a genus of flowering plants in the family Calceolariaceae. ) that are cultivated as ornamental garden plants, and they are frost-hardy down to −5 °C (23 °F), but in cultivation, they require a sheltered position in full sun.
Evidence: Jovellana is a genus of flowering plants in the family Calceolariaceae. At least three species are cultivated as ornamental garden plants. They are frost-hardy down to −5 °C (23 °F), but in cultivation they require a sheltered position in full sun.