Coriaria myrtifolia (redoul): description, toxicity, uses and distribution

Characteristics

C. myrtifolia typically forms a bushy plant with opposite, leathery leaves and inflorescences of small, often inconspicuous flowers that develop into colorful accessory structures that resemble berries. Important identifying features include leaf shape and arrangement, woody stems, and the bright color of the fruiting structures. The plant contains bioactive compounds that make some parts toxic to humans and animals.

Distribution and habitat

Redoul grows on rocky slopes, scrubland and open woods in Mediterranean climates where summers are dry and winters mild. It is adapted to well-drained soils and can tolerate drought. Its native range includes regions of the Iberian Peninsula and neighboring Mediterranean areas.

Uses and cultural history

Traditionally, the tannin-rich leaves were collected and applied in leather processing. Craftspeople used them as a tanning agent to treat leather and prepare animal skins. The foliage has also been mentioned in local ethnobotanical records as a source of natural tannins and dyes. Contemporary use is limited, and commercial tanning now relies on other materials.

Toxicity and precautions

The fruits and some other tissues are poisonous and have caused intoxication when eaten. For that reason the plant should be handled with care and not used as food. If ingestion or unexplained symptoms occur after exposure, seek medical advice. For more information about the species' toxic fruit see fruit information and general safety notes at plant toxicity. Practical handling and identification resources are available here.

• Key historical use: leaf tannins for tanning and leather work (tanning sources).
• Notable caution: attractive fruit are not edible and can be harmful (safety reference).

Distinctions: Coriaria species vary in toxicity and appearance; correct identification is important before any traditional use. Conservation status depends on local populations and habitat pressures, and wild plants should not be harvested indiscriminately.