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In page Melastoma affine:

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It is found as a shrub to 2 m (6.6 ft) in height. The leaves are ovate and measure 6 to 12 cm (2.5 to 4.5 in) in length, and 2–4 cm (1–1.5 in) wide. Covered in fine hair they have longitudinal veins. Appearing in spring and summer, the flowers occur on the ends of branchlets and are purple with five petals and sepals.[1] There are two sets of distinctive stamens, five opposite the petals and five opposite the sepals. The antesepalous ones have long anthers with a bilobed appendage at their base.[2] It produces 8mm long purple fruits that split open to expose a redish to purple flesh with many small seeds.[3] The common name "blue tongue" refers to the edible purplish-black pulp within the fruit capsules which stains the mouth blue.[4]