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a genus of plants of the family Hamamelida-ceae (sometimes attributed to the family Altingiaceae). They are tall deciduous trees with palmatilobate leaves. The small flowers, which are diclinous and lack perianths, are gathered into heads. There are five or six species, distributed in North and South America and in Asia. These trees all exude an aromatic balsam called storax when their bark is damaged. The storax obtained from Liquidambar orientalis and sweet gum (L. styraciflua) is used commercially. Both of these species, which are ornamental, are cultivated on the Black Sea Shore of the Caucasus.