1·The differentiation of the cells derived from the primordial meristem formed protoderm, ground meristem and procambium strand.
其衍生细胞分化为原表皮、基本分生组织和原形成层。
2·Leaf buttress a leaf primordium, appearing as a protuberance on the side of the stem apex, produced by periclinal division of the tunica and corpus, and associated with a procambium.