Hermannia joubertiana leaves

The leaves of Hermannia joubertiana are wedge-shaped to inversely lance-shaped, i.e. oblanceolate. There is fine toothing on the margins of the narrow leaves in picture, while some lower leaves may be pronouncedly three-toothed. The blades appear slightly fleshy, their surfaces shiny. Longitudinal in-folding occurs along the leaf midribs that may curve down towards the tips. The leaf-tips are sometimes red, also the upper margins. 

Leaf stipules, nearly half as long as the leaves, are present at the petiole base. The leaves, red upper stems and flower calyces are all notably hairy (Privett and Lutzeyer, 2010; iNaturalist; JSTOR).