Packera pauciflora — Details

Alpine Groundsel learn more about names for this taxon

Overview

Distribution

National Distribution

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Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

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Heads of Packera pauciflora are usually discoid. Its range and habitat overlap those of P. indecora; the two can be difficult to distinguish. Disjunction from principal distribution to Sierra Nevada of California is 1200 km.
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Description

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Perennials, 20–40+ cm; fibrous-rooted (caudices weakly spreading, horizontal to erect). Stems 1 or 2–3, clustered, glabrous or glabrate. Basal leaves (relatively thick and turgid) petiolate; blades elliptic-ovate, ovate, or subreniform, 20–40+ × 10–30+ mm, bases tapering to subcordate, margins dentate to crenate (proximal cauline leaves petiolate; margins dissected to pinnatifid). Cauline leaves gradually reduced (sessile, subentire). Heads 1–6+ in open to compact, subumbelliform arrays. Peduncles bracteate (bractlets cyanic or reddish), glabrous or sparsely tomentose distally. Calyculi conspicuous (bractlets deep red or at least apices deep red to purple). Phyllaries 13 or 21, deep red or green (then tips deep red to purple), 7–10 mm, glabrous. Ray florets 0 or 8–13; corolla laminae (deep orange-yellow) 5–7 mm. Disc florets 60–80+; corolla tubes 1.5–2.5 mm, limbs 2.5–3.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 3–4.5 mm. 2n = 46, 130+.
  • Flora of North America @ eFloras.org
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Diagnostic Description

Synonym

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Senecio pauciflorus Pursh, Fl. Amer. Sept. 2: 529. 1813; S. aureus Linnaeus var. discoideus Hooker; S. discoideus (Hooker) Britton; S. lembertii Greene
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SENECIO is a large genus, and a technical manual should be consulted for positive identification. S. DEBILIS and S. INDECORUS have more deeply lobed lower leaves and are generally found at lower elevations.

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Type Information

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Type collection for Senecio lemberti Greene
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): J. Lembert
Year Collected: 1895
Locality: Yosemite., California, United States, North America
  • Type collection: Greene, E. L. 1896. Pittonia. 3: 89.
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Conservation

Conservation Status

NatureServe Conservation Status

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Rounded Global Status Rank: G4 - Apparently Secure

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National NatureServe Conservation Status

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Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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Wikipedia

Packera pauciflora

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Packera pauciflora is a species of flowering plant in the aster family known by the common name alpine groundsel. It is native to northern North America, where it can be found in parts of western and eastern Canada and the northwestern United States. It grows in subalpine and alpine climates, such as mountain meadows.

It is a perennial herb producing one or more erect stems up to half a meter tall from a thick caudex and fibrous root system. The basal leaves have thick, toothed blades up to 4 centimeters long, and those higher on the stem have smaller, more dissected leaves. The inflorescence bears a single flower head or an umbel-shaped array of up to 6 heads. Each head has green to reddish or purplish phyllaries, many disc florets, and often several ray florets. The florets may be most any shade of red, orange, or yellow.

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