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对木贼混淆品──笔管草进行了显微组织研究，并首次与正品木贼茎的表面片、鞘状叶的横切面等作了对照，供鉴别参考。
A study was made on the microscopic structure of Euphorbia confuses, the pen-in-tube grass, and it was first compared with the cross-sections of the surface sheet and sheath-leaf of the Equisetum sinensis for identification.