Secondary xylem consists of pitted vessels, parenchyma fibers and rays.

次生木质部由孔纹导管 、 薄壁组织及射线所组成.

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The secondary xylem of root is well developed, and there is supernumerary cambium around the vessels.

块根的次生木质部发达, 导管周围存在额外形成层.

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The study on the stem secondary xylem of Symplocos paniculata , reveals the wooddiffuse - porous wood.

研究白檀茎次生木质部结构研究, 其为散孔材.

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