Martínez-Azorín, M.; Crespo, M. B.; Dold, A. P.; Wetschnig, W.; Pinter, M.; Pfosser, M.; van Jaarsveld, E. Sagittanthera (Hyacinthaceae, Urgineoideae), a New Buzz Pollinated Genus from the Eastern Cape Province of South Africa. Phytotaxa 2013, 98, 43–54.