Drosera filiformis Raf. - Thread-leaved Sundew


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Drosera filiformis - (image 1 of 3)



Family: Droseraceae


Acid bogs or fens and sandy shores.




Near the coast from Nova Scotia and CT, south to MD, southeastern NC, and parts of Florida.


Perennial. Leaves erect, covered in glandular hairs that exude a sticky substance; blade of leaves filiform, up to 30 cm long and 1 mm in diameter; flowers 4-12, on a scape up to 25 cm; sepals 4-7 mm; petals 7-10 mm, pink to lavender, broadly ovate; stamens 5; ovary superior; fruit a 5-6 mm capsule; seeds dark brown, 0.5-0.8 mm.


Flowers May to September

Wetland indicator: OBL

These little plants are very photogenic. The sticky hairs are used to trap insects. The plants are able then to use the nitrogen from the insects to compensate for low available nitrogen in their acidic habitats.


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY


Mellichamp, T.L. 2015. Droseraceae. In: Flora of North America North of
Mexico, Vol. 6. Oxford University Press, New York and Oxford.




 Michael Hough 2018