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FNA | Family List | FNA Vol. 21 | Asteraceae | Arnica

1. Arnica acaulis (Walter) Britton, Sterns & Poggenb., Prelim. Cat. 30. 1888.

Common leopardbane

Doronicum acaule Walter, Fl. Carol., 205. 1788

Plants 20–80 cm. Stems simple. Leaves 2–4(–6) pairs, nearly all basal; sessile; blades (with 3, 5, or 7 prominent, subparallel veins) broadly elliptic, ovate, or rhombic, 4–15 × 1.5–8 cm, margins mostly entire, apices mostly obtuse, faces hirsute and stipitate-glandular (cauline leaves 0 or 1–2, distalmost often alternate, much reduced). Heads 3–20. Involucres campanulate. Phyllaries 12–18, narrowly ovate. Ray florets 10–16; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae dark gray to dark brown, 5–7 mm, glabrous or sparsely stipitate-glandular; pappi white, bristles barbellate. 2n = 38.

Flowering Apr–Jun. Sandy pine woods and clearings, often in damp soils, chiefly on Coastal Plain; 0–300 m; Del., D.C., Fla., Ga., Md., N.J., N.C., Pa., S.C., Va.


 

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