en.do.der.misn.Botany (名词)【植物学】 The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.内皮层:皮层的最内层,在根、茎的导管组织周围形成一道叶鞘(茎衣)来源:endo- endo-(epi)dermis (epi)dermis