Lady Bird Johnson Wildflower Center - The University of Texas at Austin information

 Native Plant Database

Drosera filiformis

Threadleaf sundew

Droseraceae (Sundew Family)

Drosera filiformis (Threadleaf sundew)
Bransford, W.D. and Dolphia
A carnivorous plant with lavender-rose flowers in a 1-sided, elongated cluster on a leafless stalk, curved at tip, rising from erect, thread-like, sticky, basal leaves.

This striking member of the sundew family is distinctive, with its stringy leaves covered with glistening droplets of sticky exudate. Insects trapped in the sticky hairs are digested by plant enzymes. Researchers have found that substantial quantities of protein from the insects end up in the storage roots, demonstrating the importance of this source of nutrients. The southern plants are larger than the northern and are considered by some authorities to be the separate species D. tracyi. The genus name derives from the Greek droseros (dewy) and refers to the sticky droplets on the leaves.

Image Gallery:

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Plant Characteristics

Duration: Perennial
Habit: Herb

Bloom Information

Bloom Color: Purple
Bloom Time: Jun , Jul , Aug , Sep


USA: CT , DE , MD , MA , NJ , NY , NC , PA , RI
Canada: NS
Native Distribution: Nova Scotia; New York and Massachusetts south to New Jersey and Pennsylvania; also in North Carolina and Florida.
Native Habitat: Wet, sandy, coastal areas.

Growing Conditions

Soil pH: Acidic (pH<6.8)


Conspicuous Flowers: yes

Last Update: 2007-01-01