1. The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.
地下茎加粗过程中形成三生结构,其异常结构是由于次生韧皮部外侧发生的额外形成层所致,其起源于薄壁细胞;

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2. The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.
地下茎加粗过程中形成三生结构,其异常结构是由于次生韧皮部外侧发生的额外形成层所致,其起源于薄壁细胞;

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