| Ionactis alpina | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Ionactis |
| Species: | I. alpina |
| Binomial name | |
| Ionactis alpina (Nutt.) Greene 1897 | |
| Synonyms | |
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Ionactis alpina (formerly Aster scopulorum; common name lava ankle-aster) is a species of flowering plant in the family Asteraceae known by the common name lava aster. It is native to western United States from California to Montana, where it grows in dry areas.
Description
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 centimetres (4+3⁄4 in) in height. Most of the small leaves are on the lower part of the stem. They are up to about 1 cm (3⁄8 in) long, oval to lance-shaped and pointed, somewhat stiff and coated in hairs.
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.
References
- The Plant List, Ionactis alpina (Nutt.) Greene
- Biota of North America Program 2014 county distribution map
- University of Waterloo (Canada), Astereae Lab, Ionactis alpina Lava Ankle-aster
- ^ Flora of North America, Ionactis alpina (Nuttall) Greene, 1897. Lava ankle-aster
External links
- Jepson Manual Treatment - Ionactis alpina
- United States Department of Agriculture Plants Profile; Ionactis alpina
- Ionactis alpina in the CalPhotos photo database, University of California, Berkeley
| Taxon identifiers | |
|---|---|
| Ionactis alpina |
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| Chrysopsis alpina | |
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