Are Berkheya and Valeriana both endemic to Africa?
Berkheya Berkheya is a genus of flowering plants in the aster family, Asteraceae, and the subfamily Carduoideae, the thistles. It is distributed in tropical Africa, especially in southern regions. Of about 75 species, 71 can be found in South Africa.
Salvia disermas Salvia disermas is a herbaceous perennial shrub native to South Africa (the Cape Provinces, the Free State and the Northern Provinces), found in streambeds, moist forest, grassland, and disturbed ground. It was originally specified as "rugosa", but was changed to "disermas". It grows throughout west Africa, with its greatest concentration in South Africa, where it is used medicinally as a tea, and as a lotion for treating sores.