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Ordinary epidermis
Guard cells
Thick cuticle
Thicker cuticle
Thin cuticle
Parasitic plant
Petal epidermis
Sclerified epidermis
Papillose epidermis
Sculptured cuticle
Elaborate cuticle
Cuticular horns
Radial walls
Cuticle proper
No epidermis
Epidermal peels
Cycad peel
Paradermal
Typical stoma
Sunken stoma
Stomatal orientation 1
Unusual orientation 2
Artifact
Stomata and fibers
Stomatal crypts
Crypts, mag.
Crypt margin
Non-crypt
Water lily
Stomatal channels
Groove, hi mag
Subsidiary cells
Ledges
Papillae
Trichome
Uniseriate hair
Peltate hair, mag
Peltate, lo mag
Branched hairs
Trichome base
Lithocyst, Ficus
Lithocysts, hemp
Bulliform cells
Grass epidermis
Multiple epi
Uniseriate?
Peperomia

Fig. 10.3-4. Transverse section of leaf Dracaena fragrans (no common name). This is a very typical view of stomata, visible in a transverse section of a leaf. The vertical arrow indicates a stomatal complex: there are two subsidiary cells (sc) visible here, and two guard cells that look like little more than smudges on the inner sides of the subsidiary cells. Above the stoma is a white space with no cells, that is a substomatal cavity that is open enough that the carbon dioxide molecules will diffuse quickly away from the stomatal pore and be less likely to accidentally diffuse back out of the stoma. The diagonal arrow indicates another open area; undoubtedly it too has a stoma that opens into it, but that stoma must be a little farther back in the epidermis or it was a little farther forward and has been cut away in a preceding section. And almost certainly, that substomatal chamber is connected to the other chamber whose stoma is indicated by the arrow: the chambers are part of an interconnected space.