Cortex (pl.cortices or cortexes) A primary tissue in roots and stems of vascular plants derived from the corpus meristem, that extends inwards from the epidermis to the phloem.

• 皮层：在维管植物的根和茎中来源于原体分生组织的一种初生组织。从表皮向内一直延伸到韧皮部。