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Shale Barren Ragwort

Packera antennariifolia (Britt.) W. A. Weber & Á. Löve

Comments

provided by eFloras
Packera antennariifolia is known only from shale barrens or shale-derived soils in central Appalachia. Plants growing on steep slopes have stouter, more horizontal caudices and more extensive fibrous roots than specimens from other locations. Specimens from shale-derived soils, not growing directly on shale barrens, have weakly lobulate leaves and noticeably less hairiness.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 577, 578 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

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Perennials, 20–40+ cm; rhizomatous (rhizomes branched, horizontal to suberect). Stems 1 (sometimes from rosettes, rosettes sometimes clustered), tomentose. Basal leaves petiolate; blades broadly lanceolate to elliptic or spatulate, 20–40+ × 10–20+ mm, bases tapering, margins entire or subentire to dentate distally (faces tomentose). Cauline leaves abruptly reduced (petiolate or sessile; narrowly lanceolate to sublyrate, sharply toothed to pinnatisect or entire). Heads 6–12+ in corymbiform arrays (lateral cymiform arrays sometimes originating in leaf axils). Peduncles bracteate, densely lanate to sparsely tomentose. Calyculi inconspicuous. Phyllaries 13 or 21, green, 5–7 mm, densely tomentose (apices scarious). Ray florets 8–10(–13); corolla laminae 5–10 mm. Disc florets 25–35+; corolla tubes 3–4 mm, limbs 1.5–2 mm. Cypselae 1–1.5 mm, hirtellous on ribs; pappi 4–5 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: 577, 578 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

Synonym

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Senecio antennariifolius Britton in N. L. Britton and A. Brown, Ill. Fl. N. U.S. 3: 478,fig. 4040. 1898
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: 577, 578 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 antennariifolia

provided by wikipedia EN
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Packera antennariifolia: Brief Summary

provided by wikipedia EN

Packera antennariifolia, the shale barren ragwort, is a species of the genus Packera and family Asteraceae.

It is endemic to Maryland, Pennsylvania, Virginia, and West Virginia. It is found in the Appalachian Mountains.

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