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The ontogeny of pinna epidermis and stomatal apparatus in Encephalartos gratus Prain have been observed with LM and SEM. 用光學(xué)顯微鏡和掃描電鏡對合意非洲鐵羽片表皮及氣孔器的發(fā)育過程進(jìn)行觀察研究。