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.