Up 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
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Fig.
10.2-6. Transverse section of Indian-pipe stem (Monotropa).
Indian-pipe is parasitic
plant, one that attacks the roots of its host plant. Its body is a
subterranean, irregular mass of tissue that produces an inflorescence stalk that
pushes upward and raises the flowers above the soil surface where they can be
seen by pollinators. This inflorescence stalk is only a temporary structure, and
it has a very “inexpensive” construction: it consists mostly of parenchyma
and the epidermis cells have so little cuticle that it cannot be seen at this
magnification.
Note the lack of stomata: subterranean parasitic
plants carry out no photosynthesis, have no need to absorb carbon dioxide, and
have lost the ability to make stomata.
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