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MOUNTAIN AVENS Dryas octopetala (Rosaceae) Height to 6cm. Creeping, perennial undershrub. Found on basic rocks, in mountains and, locally, at to sea level. FLOWERS are 3-4cm across with 8 or more white petals and a mass of yellow stamens (Jun-Jul). FRUITS are dry and 1-seeded, with feathery plumes. LEAVES are dark green, oblong and toothed. STATUS-Locally common in Scotland and W Ireland.