Drosera filiformis, commonly known as the thread-leaved sundew,[2] is a small, insectivorous, rosette-forming species of perennial herb.

A species of sundew, it is unusual within its genus in that the long, erect, filiform (thread-like)[2] leaves of this plant unroll in spirals – an arrangement similar to the circinate vernation seen in ferns.

D. filiformis occurs naturally in both Canada and the United States; its natural range extends down the eastern seaboard of North America from south western Nova Scotia[2] in the north down through New England to Florida in the south.

Its disjunct distribution on the Atlantic Coast reflects the prehistoric land connection between Nova Scotia and Cape Cod, Massachusetts, which formed an ancient extension of the Atlantic Plain region that likely persisted well into the current interglacial period as an island chain.

All of these cultivars are grown with similar conditions as most other Drosera species: mineral-poor soil and distilled, reverse osmosis, or collected rain water.