Aceda de Madeira, vinagrera de monte (Rumex maderensis)

Perennial shrub, with a woody base, up to 1 m. Leaves are entire, up to 8 cm long, ovate-deltoid, hastate or sagittate, rather fleshy and light green. Flowers are greenish and arranged in terminal inflorescences; fruits are reddish-purple. An endemic of Madeira and the Canaries (central and western islands), common in degraded areas of evergreen and fayal-brezal firetree and heath forests, in Canary pine forests and escobonales, from 400-1,500 m; in Madeira it is not usually found beyond 1,000 m. A good colonizer of recent and also historical (in the last 500 years) lava flows.