| Agoseris glauca | |
|---|---|
| |
| Mount Rainier National Park | |
| Conservation status | |
 Secure (NatureServe) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Agoseris |
| Species: | A. glauca |
| Binomial name | |
| Agoseris glauca (Pursh) Raf. | |
| Synonyms | |
Synonymy
| |
Agoseris glauca is a species of flowering plant in the family Asteraceae known by the common names false dandelion, pale agoseris, prairie agoseris, and short-beaked agoseris. It is native to western North America.
Description
Agoseris glauca is a perennial herb which varies in general appearance. Growing up to 70 centimeters (28 inches), it produces a basal patch of leaves of various shapes which may be as long as the plant is high, but are typically up to 35 cm (14 in).
There is no stem, but from May to September the plant flowers in a stemlike inflorescence which is sometimes erect, reaching heights near .5 metres (1+1⁄2 feet) or taller. The flower head is 1–3 cm (1⁄2–1+1⁄4 in) wide with layers of pointed phyllaries. The head is ligulate, bearing many yellow ray florets but no disc florets. The rays may become pinkish with age.
The fruit is an achene with a body up to a centimeter long and a pappus, which may be almost 2 cm in length.
Similar species
Other species in the genus known as false dandelion or mountain dandelion, as well as true dandelions, can be distinguished from A. glauca by differences in their fruit.
Taxonomy
- Varieties
- Agoseris glauca var. dasycephala (Torr. & A. Gray) Jeps.
- Agoseris glauca var. glauca
Distribution and habitat
The plant is native to western and northwestern North America from Alaska east to the Northwest Territories and Ontario, southeast to California, Arizona, and New Mexico. It grows in many habitat types, usually those which are non-forested.
Uses
The plant contains a bitter milky juice, which solidifies into a substance that can be chewed as gum; this may have been done by some Plains Indians.
References
- ^ The Plant List search for Agoseris glauca
- ^ Taylor, Ronald J. (1994) . Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 160. ISBN 0-87842-280-3. OCLC 25708726.
- ^ Spellenberg, Richard (2001) . National Audubon Society Field Guide to North American Wildflowers: Western Region (rev ed.). Knopf. pp. 353–354. ISBN 978-0-375-40233-3.
- ^ Flora of North America, Agoseris glauca
- CalFlora Database: Agoseris glauca var. glauca
- CalFlora taxon report, University of California: Agoseris glauca
External links
Media related to Agoseris glauca at Wikimedia Commons- Jepson Manual Treatment — Agoseris glauca
- USDA Plants Profile for Agoseris glauca
- USGS NPWRC Profile
- Agoseris glauca — Calphotos Photo gallery, University of California
| Taxon identifiers | |
|---|---|
| Agoseris glauca |
|
| Troximon glaucum | |
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