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Brewer's Ragwort

Packera breweri (Davy) W. A. Weber & Á. Löve

Comments

provided by eFloras
Packera breweri is known only from Coast Ranges from San Francisco Bay to Los Angeles County and along the eastern edges of the San Joaquin Valley. Populations are relatively small and sporadic; the plants appear not to hybridize with other species of Packera.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 575,580 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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eFloras.org
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Description

provided by eFloras
Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). Stems 1, glabrous or leaf axils tomentose. Basal leaves (and proximal cauline) petiolate; blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous). Cauline leaves gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). Heads 15–50+ in corymbiform arrays. Peduncles usually ebracteate (rarely with 1–2 bractlets), glabrous. Calyculi inconspicuous. Phyllaries 13 or 21, green, 7–9+ mm, glabrous. Ray florets 8–10+; corolla laminae 10–15+ mm. Disc florets 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. Cypselae 2–2.5 mm, glabrous; pappi 6–7 mm. 2n = 46.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 575,580 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
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eFloras

Synonym

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Senecio breweri Burtt Davy, Erythea 3: 116. 1895
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 575,580 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

Packera breweri

provided by wikipedia EN

Packera breweri is a species of flowering plant in the aster family known by the common name Brewer's ragwort. It is endemic to central California, where it occurs in the woodlands and grasslands of the Central Coast Ranges. They are more frequently found in mid-southern counties of California near the coast, such as Kern or Monterey.[1]

It is a biennial or perennial herb producing one erect stem from a fibrous root and caudex unit. It grows to a maximum height near one meter or slightly taller. It is mostly hairless, but sometimes has tufts of hairs in the leaf axils. The leaves may be up to 30 centimeters long near the base of the plant, their blades so deeply divided into lobes they appear to have leaflets. Each lobe is edged with teeth. Leaves occurring higher on the stem are smaller with narrower lobes.

It tends to flower during its bloom period in April and May.[2] The inflorescence contains many flower heads, each lined with green phyllaries. The head contains many golden yellow disc florets and generally either 8 or 13 narrow yellow ray florets each measuring 1 to 2 centimeters long. The fruit is an achene around a centimeter long, including its pappus of bristles.

References

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Packera breweri: Brief Summary

provided by wikipedia EN

Packera breweri is a species of flowering plant in the aster family known by the common name Brewer's ragwort. It is endemic to central California, where it occurs in the woodlands and grasslands of the Central Coast Ranges. They are more frequently found in mid-southern counties of California near the coast, such as Kern or Monterey.

It is a biennial or perennial herb producing one erect stem from a fibrous root and caudex unit. It grows to a maximum height near one meter or slightly taller. It is mostly hairless, but sometimes has tufts of hairs in the leaf axils. The leaves may be up to 30 centimeters long near the base of the plant, their blades so deeply divided into lobes they appear to have leaflets. Each lobe is edged with teeth. Leaves occurring higher on the stem are smaller with narrower lobes.

It tends to flower during its bloom period in April and May. The inflorescence contains many flower heads, each lined with green phyllaries. The head contains many golden yellow disc florets and generally either 8 or 13 narrow yellow ray florets each measuring 1 to 2 centimeters long. The fruit is an achene around a centimeter long, including its pappus of bristles.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
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wikipedia EN