dcsimg

Description

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Plants 8–35 cm. Stems (branches from rhizomes) simple. Leaves 2–4 pairs (basal often persistent on sterile rosettes), mostly cauline; petiolate (at least basal) or sessile; blades oblanceolate to spatulate, 2–7 × 0.5–2.5 cm, margins usually entire, sometimes denticulate, rarely dentate, apices usually acute, sometimes obtuse, faces sparsely puberulent, moderately pubescent distally, stipitate-glandular. Heads 1–3(–5). Involucres turbinate-campanulate. Phyllaries 9–15, linear-oblong to narrowly lanceolate. Ray florets 6–10; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae brown, 4–7 mm, densely hirsute (not stipitate-glandular); pappi white, bristles barbellate . 2n = 38, 76.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 367, 371 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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Arnica rydbergii

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Arnica rydbergii: Brief Summary

provided by wikipedia EN

Arnica rydbergii is a North American species of arnica in the sunflower family, known by the common name Rydberg's arnica or subalpine arnica or subalpine leopardbane. It is native to western Canada (Alberta, British Columbia), and the western United States (Alaska, Washington, Oregon, Utah, Idaho, Montana, Utah, Wyoming, Colorado, South Dakota).

Arnica rydbergii is an herb up to 35 cm (14 inches) tall. Flower heads are yellow, with both ray florets and disc florets. It grows in alpine meadows and rocky slopes at high altitudes in mountainous areas.

The species is named for Swedish-American botanist Per Axel Rydberg, 1860–1931.

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