Celtis jessoensis
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Celtis jessoensis, known as the Japanese hackberry or Jesso hackberry (from an archaic reading of "Ezo": Hokkaidō), is a species of hackberry native to Japan and Korea. It is a deciduous tree growing to 20–25 m (66–82 ft) tall. The leaves are 5–9 cm (2.0–3.5 in) long and 3–4 cm (1.2–1.6 in) broad, with a sharply serrated margin, glaucous beneath and downy on the leaf veins.