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tackstem

Scientific Name: Calycoseris

Family: Asteraceae

Category: Dicot

Growth:

Duration:

Other Names:

       

Calycoseris wrightii: White Tackstem

Calycoseris wrightii, commonly known as White Tackstem, is an annual spring wildflower found in the southwestern United States.

Considerations for Pets

  • The plant has tack-shaped gland hairs on its upper stems and bracts.
  • Yellow Tackstem (Calycoseris parryi), a related species, contains milky sap.

Common Names

  • White Tackstem
  • White Cupfruit

Taxonomy and Nomenclature

  • Scientific Name: Calycoseris wrightii A. Gray
  • Family: Asteraceae (Aster family)

Distribution and Habitat

  • Native to the southwestern United States.
  • Often found in desert regions such as the Mojave and Sonoran Deserts.
  • Grows in sandy soil.

Morphological Characteristics and Growth Habits

  • It is an annual spring wildflower.
  • Reaches up to 12 inches in height.
  • Characterized by tack-shaped gland hairs on their upper stems and bracts.
  • Mostly basal leaves divided.

Related Species

  • The genus Calycoseris contains two species.
  • Calycoseris parryi (Yellow Tackstem) is the other species.

Further Information

  • Encyclopedia of Life