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The Formosan blue berry (Vaccinium wrightii) belongs to Ericaceae (the Heath family). It is a small evergreen tree that is distributed from Japan's Nansei Islands to Taiwan. It grows in mountainous forests, forest edges, and grasslands, reaching a height of 1 to 3 m. It branches profusely from the base; the branches are round with smooth bark, and young branches are reddish-brown. The leaves are elliptical and leathery, with sharp serrations along the margins, and are arranged alternately. From around February to April, racemes emerge from the upper leaf axils, bearing white, slightly reddish flowers that hang downward. The corolla is small, ranging from urn-shaped to bell-shaped, with a shallow 4-5 lobed tip. The fruit is a spherical berry that ripens to black; it is sweet and sour and edible. The Japanese name "Guima" is derived from the Okinawan dialect. It is also known by the alternative name "Hime-sha-shanbo". In Taiwanese Chinese, it is called "大葉越橘".
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