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Pale Agoseris

Agoseris glauca (Nutt. ex Pursh) Rafin.

Description

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Stems 0. Leaves erect to decumbent; petioles rarely purplish, petiole margins glabrous or pubescent, not usually ciliate; blades lanceolate to oblanceolate, 2–46 cm, margins usually entire, sometimes dentate, rarely lobed or lacerate, lobes 2–3 pairs or irregularly arranged, lanceolate, spreading, lobules 0, faces glabrous and glaucous or sparsely villous to tomentose. Peduncles not notably elongating after flowering, 5–60(–90) cm in fruit, glabrous or glabrate, or apically puberulent to lanate, sometimes stipitate-glandular. Involucres obconic to hemispheric, 1–3 cm in fruit. Phyllaries in 2–3 series, green or medially rosy purple, often with purple-black spots, midstripe, and/or tips, subequal to unequal, margins glabrous or ± hairy, not usually ciliate, faces glabrous or tomentose, sometimes stipitate-glandular or eglandular; outer erect or spreading, apices adaxially glabrous or hirsuto-villous; inner erect, not notably elongating in fruit. Receptacles epaleate or paleate. Florets 15–150; corollas yellow, tubes 4–18 mm, ligules 6–24 × 2–5 mm; anthers 3–7 mm. Cypselae 7–15 mm, bodies fusiform to narrowly conic, 5–9 mm, tapered to stout beaks 1–4 mm, lengths mostly less than 1/2 times bodies; ribs flattened to ridged, glabrous, or distally scabrous; pappi in 2–3 series, 8–18 mm. 2n = 18, 36
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 323, 325, 326, 328, 329 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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Synonym

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Troximon glaucum Pursh, Fl. Amer. Sept. 2: 505. 1813
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copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 323, 325, 326, 328, 329 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Agoseris glauca

provided by wikipedia EN

Agoseris glauca is a species of flowering plant in the family Asteraceae known by the common names false dandelion,[2] 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),[3] it produces a basal patch of leaves of various shapes which may be as long as the plant is high,[4] but are typically up to 35 cm (14 in).[3]

There is no stem, but from May to September[3] the plant flowers in a stemlike inflorescence which is sometimes erect, reaching heights near .5 metres (1+12 feet) or taller. The flower head is 1–3 cm (121+14 in) wide with layers of pointed phyllaries. The head is ligulate, bearing many yellow ray florets but no disc florets.[4] The rays may become pinkish with age.[2]

The fruit is an achene with a body up to a centimeter long and a pappus, which may be almost 2 cm in length.[4]

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.[3]

Taxonomy

Varieties[1][4]
  • Agoseris glauca var. dasycephala (Torr. & A. Gray) Jeps.
  • Agoseris glauca var. glauca[5]

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.[6] It grows in many habitat types, usually those which are non-forested.[2]

Uses

The plant contains a bitter milky juice, which solidifies into a substance when can be chewed as gum; this may have been done by some Plains Indians.[2]

References

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Agoseris glauca: Brief Summary

provided by wikipedia EN

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.

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Wikipedia authors and editors
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wikipedia EN