Four genera and more than 100 species: Frigid zone to tropical tropical regions of both hemispheres; 2 genera native to Australia.
Drosera - A genus of ca. 90 species worldwide; 54 species occur naturaly in Australia.
Marchant, N.G., Aston, H.I. & George, A.S. in George, A.S. (Ed) (1982), Flora of Australia 8.