Sunken stomata in Pinus (Gymnopsermae)

Photo Google Wikimedia Commons
Cross section: Pinus needle magnification: 400x
A single layered epidermis of lignified cells is covered by a heavy waxy cuticle. Numerous sunken stomata are scattered over the entire epidermal surface. They are bounded by pairs of subsidiary cells, and open internally to a sub-stomatal cavity and externally to a respiratory cavity or vestibule.
The underlying hypodermis consists of several layers of thick-walled sclerenchyma, particularly well-developed at ridges.

10 February 2014, Berkshire Community College Bioscience Image Library

3,264 × 1,840 (5.58 MB)

Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s