大乔木（树高>25m，胸径>40cm）
Big tree (height)>25m,Diameter at breast height>40cm
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树皮薄（皮厚不足5mm）
Bark thickness (thickness <5mm)
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外皮纵裂（裂口宽度与深度5——10mm）
Outer bark longitudinal fissured
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内皮石细胞及花纹不见
Stone cell and figures on inner bark don’t be obvious
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材表平滑
Smooth in log surface
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中国西南
Southwest China
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黄河中下游
Middium, lower reaches of Huanghe River
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长江中下游
Middium, lower reaches of Yangze River
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长江以南各省区
Each province, region in south of Yangze River
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中国华北
Northern China
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