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palmleaf thoroughwort

Scientific Name: Conoclinium greggii

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Palmleaf Thoroughwort (Conoclinium dissectum)

The plant known as Palmleaf Thoroughwort, scientifically classified as Conoclinium dissectum, is a North American flowering plant belonging to the sunflower family.

Considerations for Pets

  • Some sources list the plant as being formerly classified as Eupatorium greggii.

Common Names

  • Palmleaf Thoroughwort
  • Palm-leaf Mistflower
  • Blue Mist
  • Mist Flower
  • Gregg's Mistflower
  • Gregg's Eupatorium
  • Texas Ageratum
  • Purple Palmleaf Mistflower

Taxonomy and Nomenclature

  • Scientific Name: Conoclinium dissectum A. Gray
  • Kingdom: Plantae
  • Taxonomic Rank: Species
  • Family: Asteraceae (Sunflower family)
  • Synonyms:
    • Eupatorium greggii A. Gray (former botanical name)
    • Conoclinium greggii (A. Gray) Small
    • Conoclinium dissectum DC.

Distribution and Habitat

  • Native to North America, specifically the southwestern U.S. (e.g., West Texas).
  • Observed in locations such as Tucson and Phoenix.

Morphological Characteristics

  • Leaves are arranged oppositely on the stem.
  • Leaf blades are ovate-deltate to ovate, 1.5–4 cm in size, with attenuate bases.
  • Perennial, reaching approximately 2 feet in height.
  • Produces lavender-blue flowers that cluster together.
  • Only disk flowers present.

Interactions with Other Organisms

  • Attracts wildlife, including Monarch and Queen butterflies, which feed on its nectar.

Quirky Facts

  • The Palmleaf Thoroughwort was previously considered an inactive concept that has since been replaced by Conoclinium greggii.

Traditional Uses

  • People use the dried leaves and flowers to make medicine to reduce swelling.
  • It is also occasionally referred to as Boneset.

Additional Resources

  • Cochise County Cooperative Extension: www.ag.arizona.edu/cochise/mg/
  • Encyclopedia of Life