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gulf coast swallow-wort

Scientific Name: Cynanchum angustifolium

Family: Asclepiadaceae

Category: Dicot

Growth: Vine, Forb/herb

Duration: Perennial

Other Names:

       

Gulf Coast Swallow-wort (Cynanchum angustifolium)

Cynanchum angustifolium, commonly known as Gulf Coast Swallow-wort, is a native vine found along the Gulf Coast of the United States.

Considerations for Pets

  • This plant is a member of the milkweed family (Asclepiadaceae/Apocynaceae).
  • It's a climbing vine, which may present a hazard if pets become entangled.

Scientific Classification

  • Scientific Name: Cynanchum angustifolium Pers.
  • Common Name: Gulf Coast Swallow-wort
  • Synonym: Seutera angustifolia (mentioned as a previous name in the provided text)
  • Family: Asclepiadaceae (also listed as Apocynaceae in the text, a more recent classification)
  • Kingdom: Plantae
  • Taxonomic Rank: Species

Distribution and Habitat

  • Found along the Gulf Coast (AL, FL, GA).
  • Grows in dunes, salt marshes, coastal hammocks, brackish areas, and along roadsides.

Ecological Role

  • May suppress native plants by shading them when growing in masses.
  • The text mentions the dependence of the invasive nonnative vine pale swallow-wort on AMF (arbuscular mycorrhizal fungi), suggesting a potential influence on coastal transition ecosystems along the northern Gulf of Mexico.

Morphological Characteristics

  • Climbing vine.
  • Long flower stalks and notched inner flower structures (based on partial sentence and context).
  • Seed pods are produced.

Interactions with Other Organisms

  • Serves as a nectar source for insects.
  • Host plant for caterpillars.
  • Monarch butterflies may lay eggs on swallow-wort species (though the text is referencing other species of swallow-wort).
  • Thread-waisted wasps (Sphecidae family, Prionyx) drink nectar from its blooms.

Landscape Uses

  • Primarily recommended for natural landscapes and habitat restorations.
  • Suitable for butterfly gardens in wet, brackish areas along the coast.

Resources and Further Information

  • Discover Life: Offers information on biology, natural history, ecology, identification, and distribution.
  • Dave's Garden: A community-based gardening website.
  • National Wetland Plant List.
  • Aquatic and Wetland Plants of the Western Gulf Coast (Stuyzenbaker, 1999).
  • USDA Plants Database (mentioned as "Sce: USDA").
  • World Register of Marine Species (mentioned as "Sce: World Register of Marine Species").