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erica
''Erica'' , is a genus of roughly 860 species of flowering plants in the family Ericaceae. The English common names "heath" and "heather" are shared by some closely related genera of similar appearance. The genus ''Calluna'' was formerly included in ''Erica'' – it differs in having even smaller scale-leaves (less than 2–3 mm long), and the flower corolla being consisting of separate petals. ''Erica'' is sometimes referred to as "winter (or spring) heather" to distinguish it from ''Calluna'' "summer (or autumn) heather".
==Description==
Most of the species are small shrubs from high, though some are taller; the tallest are ''E. arborea'' (tree heath) and ''E. scoparia'' (besom heath), both of which can reach up to tall. All are evergreen, with minute, needle-like leaves 2–15 mm long. Flowers are sometimes axillary, and sometimes borne in terminal umbels or spikes, and are usually outward or downward facing. The seeds are very small, and in some species may survive in the soil for decades.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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