Arnica

(Arnica montana)

Basic Identification

Common Names
Arnica
Mountain arnica
Leopard’s bane
Mountain tobacco

Botanical Name
Arnica montana

Other medicinal species occasionally used include:
Arnica chamissonis

Plant Family
Asteraceae (Daisy family)

Parts Used

• Flowers (primary medicinal part)
• Occasionally roots or whole flowering tops in some traditional systems

Arnica is primarily used externally in herbal medicine.

Habitat and Native Range

Arnica is native to:
• mountainous regions of Europe
• alpine meadows and upland grasslands

It naturally grows in:
• cool mountain climates
• open meadows
• rocky soils
• acidic grasslands

Arnica prefers:
• full to partial sun
• well-drained soil
• cooler climates
• low-fertility mountain soils

Wild populations have declined in some regions due to overharvesting and habitat loss, making cultivated sources increasingly important.

Overview

Arnica is one of the most well-known topical herbs in Western herbalism for supporting bruising, muscular soreness, tissue trauma, and inflammatory swelling. It has a long traditional history of use following physical strain, falls, overexertion, sprains, and blunt injuries.

Unlike many internally used medicinal herbs, arnica is primarily valued for external application. It is considered a classic first-aid herb for soft tissue support and is commonly included in salves, oils, creams, compresses, and liniments designed to soothe injured or overworked tissues.

Despite its popularity, arnica is considered a relatively strong herb and is generally not used internally in standard herbal practice due to toxicity concerns at larger doses.

Basic Uses

Arnica is commonly used for:

• Bruising and discoloration
• Sprains and strains
• Muscle soreness and stiffness
• Swelling after injury
• Overworked muscles and joints
• Blunt tissue trauma
• Minor inflammatory pain
• Sports recovery support
• External circulatory stagnation and congestion

Botanical Description / Morphology

Growth Habit

Perennial herb, typically growing 8–24 inches tall, with upright flowering stems arising from a low basal rosette.

Arnica prefers alpine and meadow environments and often grows in scattered clumps rather than dense colonies.

Stem

• Upright and slender
• Light green to reddish-green
• Slightly hairy or glandular
• Usually unbranched or minimally branched

Leaves

Basal Leaves

Arrangement: Opposite, forming a low rosette

Shape: Oval to lance-shaped

Texture:
• Softly hairy
• Slightly leathery

Color: Medium green

Stem Leaves

• Smaller and fewer than basal leaves
• Opposite arrangement
• Sessile (without stalks)

Venation

• Prominent parallel-like veins visible on leaves

Flowers

Type: Composite flower (daisy family)

Color: Bright yellow to orange-yellow

Petals:
• Narrow ray florets
• Slightly irregular or tousled appearance

Center: Golden-yellow disc florets

Flower heads are usually solitary or few in number atop each stem.

Roots

• Rhizomatous root system
• Fibrous roots extending from underground rhizomes

This allows slow spreading over time in suitable environments.

Key Identifying Features

• Bright yellow daisy-like flowers
• Low basal leaf rosette
• Softly hairy stems and leaves
• Opposite leaf arrangement
• Mountain meadow habitat
• Slightly aromatic resinous scent when crushed

Similar Species / Lookalikes

• Other yellow daisy-family flowers (Asteraceae)
→ may resemble arnica superficially

• Calendula (Calendula officinalis)
→ cultivated medicinal flower with broader petals and different leaf structure

• Senecio species
→ some yellow composites may resemble arnica but are not interchangeable

Correct identification is especially important because some yellow-flowered members of the Asteraceae family may be toxic or inappropriate substitutes.

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