Arnica L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 189

93. Arnica L. 2

Herbaceous, rhizomatous perennials. Leaves simple, usually mainly basal; cauline few, opposite. Florets yellow. Involucral bracts herbaceous, usually in 2 rows. Receptacle convex, hairy. Ligulate florets female; tubular florets hermaphrodite. Achenes ribbed; pappus of 1 row of simple hairs.

Literature: B. Maguire, Brittonia 4: 386-510 (1943).

Leaves 0-5-2 cm wide, narrowly oblanceolate to elliptic-lanceolate; cauline usually scattered on stem 1. angustifolia

Leaves 2-4 cm wide, obovate or elliptical to oblanceolate; cauline usually crowded near base of stem 2. montana