Sentence Examples with the word Epithem

In other cases the epithem may be absent altogether, the tracheal strand debouching directly on the lacunae of the mesophyll.

The epithem is penetrated by a network of fine intercellular spaces, which are normally filled with water and debouch on one or more intercellular cavities below the epidermis.

The epithem is frequently surrounded by a sheath of cuticularized cells.