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Heartleaf Arnica Arnica cordifolia

   

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Heartleaf Arnica
© Frank S. Balthis

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Alternate name: Heartleaf Leopardbane

Family: Asteraceae, Aster view all from this family

Description Stems with 2-4 pairs of heart-shaped leaves are topped by 1-3 broad yellow heads. Plants in patches.
Flowers: heads 2-3 1/2" (5-8.8 cm) wide; with 10-15 rays each and many tiny disk flowers; bracts of head have long spreading hairs.
Leaves: those on separate, short shoots largest, 1 1/2-5" (3.8-12.5 cm) long, with long petioles attached at notch; those on flowering stem with short or no petioles.
Fruit: seed-like, with a tuft of white or pale tan hairs at top.
Height: 4-24" (10-60 cm) tall.

Flower April-June, occasionally to September.

Habitat In lightly shaded woods.

Range From Alaska to southern California; east to the Rocky Mountains from Canada to New Mexico; also in northern Michigan.

Discussion In alpine areas or in open places along roads, the leaves may be narrower and without the notch at the base of the blade. All western species have paired leaves on the stems, but only this one has heart-shaped leaves.

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