Ionactis alpina

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Ionactis alpina
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Ionactis
Species: I. alpina
Binomial name
Ionactis alpina
(Nutt.) Greene 1897
  • Aster scopulorum A.Gray 1880
  • Chrysopsis alpina Nutt. 1834 not Aster alpinus L. 1753
  • Diplopappus alpinus (Nutt.) Nutt.
  • Leucelene alpina (Nutt.) Greene

Ionactis alpina (formerly Aster scopulorum; common name Lava Ankle-aster) is a species of aster known by the common name lava aster. It is native to western United States from California to Montana,[2] where it grows in dry areas.[3]


Ionactis alpina is a perennial herb growing from a caudex and fibrous root system. It produces a short, mostly erect, hairy stem up to 12 centimeters (4.8 inches) in height. Most of the small leaves are on the lower part of the stem. They are up to about a centimeter (0.4 inches) long, oval to lance-shaped and pointed, somewhat stiff and coated in hairs. [4]

The inflorescence bears solitary flower heads with purple-green phyllaries, 7–21 thin blue, purple, or occasionally white ray florets surrounding 19–50 long yellow disc florets. The fruit is a hairy achene.[4]


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