Phylohydrax is a genus of plants in the family Rubiaceae. Its species are native to Madagascar, Tanzania and South Africa.
Taxonomy The genus Phylohydrax was established by Christian Puff in 1986 to accommodate two species previously placed in the genus Hydrophylax. The two genera were distinguished on morphological grounds, in particular the detailed structure of the flowers. Phylohydrax species are heterostylous unlike those of Hydrophylax. Puff placed the genus in the tribe Spermacoceae, a placement supported by more recent sources.
Species , Plants of the World Online accepted two species: Phylohydrax carnosa (Hochst.) Puff – Madagascar, South Africa Phylohydrax madagascariensis (Willd. ex Roem. & Schult.) Puff – Tanzania, Madagascar
References
External links Photo of herbarium specimen at Missouri Botanical Garden, collected near Durban, South Africa, Lewis, Walter Hepworth - 6291, Phylohydrax carnosa Photo of herbaruim specimen at Missouri Botanical Garden, collected in Madagascar, Miller, James Spencer - 3840, Phylohydrax madagascariensis