The anatomy of a typical dicot stem shows clear distinction into different regions. The primary structure shows (i) epidermis, (ii) hypodermis, (iii) cortex which is generally narrow, (iv)Endodermis, (v) Pericycle, (vi)stele and (vii) pith. In general the dicotyledon stems have the following distinct features:
(i) Hypodermis is collenchymatous.
(ii) Pericycle is sclerenchymatous either in continuous layer or discontinuous patches.
(iii) Vascular bundles are arranged in a ringlike manner.
(iv) Vascular bundles are collateral or bicollateral, open and generally lack bundle sheath.
(v) Pith is broad.