Senecio pseudoarnica


Linnaea 6: 240. 1831.

Basionym: Arnica maritima Linnaeus Sp. Pl. 2: 884. 1753,
Synonyms: S. pseudoarnica var. rollandii Victorin S. rollandii
Treatment appears in FNA Volume 20. Treatment on page 568. Mentioned on page 545.

Perennials, (15–)20–60(–100) cm (caudices erect). Herbage arachno-tomentose to sericeous-lanate (especially on abaxial faces of phyllaries), unevenly glabrescent. Stems single (turgid). Leaves evenly distributed (proximal withering before flowering); subsessile or petiolate; blades obovate to oblanceolate, 5–15(–25) × 2–6(–10) cm, bases tapered, margins serrate-dentate to denticulate or subentire (distal leaves slightly smaller). Heads 1–5(–15+) in corymbiform arrays (involucres notably large, 20–40 mm diam.). Calyculi of 6–10 linear bractlets (longest nearly equaling phyllaries). Phyllaries ± 21, 8–15 mm (sometimes purplish or pinkish-tinged), tips greenish. Ray florets usually ± 21, rarely 0; corolla laminae 20–25 mm. Cypselae glabrous. 2n = 40.

Phenology: Flowering summer.
Habitat: Sandy-gravelly ocean shores and upper beaches
Elevation: 0 m



St. Pierre and Miquelon, B.C., N.B., Nfld. and Labr., N.S., Que., Alaska, Maine, ne Asia.


Rayless individuals of Senecio pseudoarnica have been recognized as var. rollandii or forma rollandii (Victorin) Fernald; they are not otherwise distinctive.

Selected References


Lower Taxa

... more about "Senecio pseudoarnica"
Theodore M. Barkley† +
Lessing +
Arnica maritima +
St. Pierre and Miquelon +, B.C. +, N.B. +, Nfld. and Labr. +, N.S. +, Que. +, Alaska +, Maine +  and ne Asia. +
Sandy-gravelly ocean shores and upper beaches +
Flowering summer. +
Illustrated +
S. pseudoarnica var. rollandii +  and S. rollandii +
Senecio pseudoarnica +
species +