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threadleaf sundew

Scientific Name: Drosera filiformis

Family: Droseraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names: CT (thread-leaf sundew), FL (dew-thread), NY (dewt

       

Drosera filiformis: The Thread-leaved Sundew

Drosera filiformis, commonly known as the Thread-leaved sundew, is a fascinating carnivorous plant native to Eastern North America. Its unique appearance and insect-trapping abilities make it a popular choice for enthusiasts.

Considerations for Pets

  • This plant has sticky hairs lining its leaves, potentially causing temporary discomfort if touched.

Considerations for Children

  • This plant has sticky hairs lining its leaves, potentially causing temporary discomfort if touched.

Taxonomy and Nomenclature

  • Scientific Name: Drosera filiformis Raf.
  • Common Names: Thread-leaved sundew, threadleaf sundew, thread leaved sundew.
  • Family: Droseraceae (Sundew Family)
  • Kingdom: Plantae

Distribution and Habitat

  • Drosera filiformis is native to Eastern North America.
  • It thrives in savannas, bogs, damp ditches, and along the edges of karst ponds.
  • Specific locations mentioned include the coastal plains of North Carolina, Burlington County, New Jersey, and the Florida Panhandle.

Morphological Characteristics and Growth Habits

  • It is a small, rosette-forming, upright, glandular perennial herb.
  • It grows to over 1 foot tall, making it one of the largest sundews.
  • The "thread leaf" name comes from its tall, slender foliage.
  • In summer, it produces thin spikes holding small white or lavender-rose flowers.
  • New leaves may have red tentacles.

Ecological Role

  • Drosera filiformis is a carnivorous plant that captures insects with its glistening, sticky dew.
  • It exhibits intraspecific competition for insect resources.

Interactions with Other Organisms

  • It attracts and traps flying insects with its sticky dew.
  • Mention of a Red-banded Hairstreak being captured by a Drosera filiformis var. tracyi.

Cultivars and Varieties

  • Drosera filiformis 'California Sunset'
  • Drosera filiformis "Florida All-Red" - A stunning red form found in the Florida Panhandle.
  • Drosera filiformis var. tracyi

Further Information

  • Rice, Barry A. (2011) The thread-leaf sundews Drosera filiformis and Drosera tracyi. Carniv. Pl. Newslett. 40(1):4-16 ( PDF ).
  • Dave's Garden community for tips and ideas on gardens, seeds, and plants.
  • USDA-NRCS PLANTS Database
  • Discover Life page about the biology, natural history, ecology, identification, and distribution of Drosera filiformis.