Harveya is a genus of root holoparasites in Orobanchaceae, distributed throughout southern Africa. Preliminary studies of herbarium material indicate that 19-25 species of Harveya inhabit South Africa, the center of diversity for this genus. Morphometric analysis of herbarium material was performed to establish species boundaries and morphological characters have been used to generate a preliminary phylogeny of this genus. Future work will involve inclusion of molecular data into phylogenetic analysis, a monograph based on natural groupings, and investigation of the evolution of photosynthetic loci in this holoparasite.

Key words: Harveya, holoparasite, Orobanchaceae, parasite, phylogeny