Blepharis

Blepharis is a genus of plant in family Acanthaceae. It contains around 128 species found in seasonally dry to arid habitats from Africa through Arabia to Southeast Asia. In section Acanthodium, there are 13–15 species that use the C₄ carbon fixation pathway. Phylogenetic analysis suggests that this pathway evolved up to three times independently in the genus over the last five million years.