Extract from 2008 Droseraceae classification. This extract from the 2008 Droseraceae classification includes four of the species belonging to the genus Drosera. In the 2008 classification no synonyms are provided for many of the Drosera species. Two of the species shown - Drosera filiformis and Drosera rotundifolia - have varieties (Drosera filiformis var. filiformis, etc.). The classification includes another genus (Dionaea) but we have not given any of the species for that group.