The endodermis is the boundary between the cortex and the stele. ... In most seed plants, especially woody types, an endodermis is absent from the stems but is present in roots.

Is there an endodermis in a stem if not why not?

It is well known that an endodermis with casparian strip always occurs in roots, but few people are aware that it also occurs in stems and leaves of some vascular plants. ... Etiolation can induce casparian strips in stems and petioles of some herbaceous plants, but results from leaf blades are questionable.

Do leaves have an endodermis?

The leaves are all markedly xeromorphic in character, and an endodermal layer is always present. This state of affairs is in marked contrast to that which obtains in the leaves of most angiosperms where, as a rule, no definite endodermis can be distinguished.