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27 Cards in this Set
- Front
- Back
tiny hairs on the surface of leaf blades
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trichomes
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blade is attached to a stem like appendege called
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petiole
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if the blade doesnt have a petiole attaching it to the stem
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sessile
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leaf like structures at attachment point of stem
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stipules
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phyllotaxy
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alternate, spiral, opposite, or whorled
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1 leaf per node
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spiral phyllotaxy
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2 leaves per node
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opposite phyllotaxy
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3 or more leaves per node
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whorled phyllotaxy
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arrangement of leaves on a twig
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phyllotaxy
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veins branch randomly like a net
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dicot, reticulate vinnation
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two main dicot leaf venation patterns
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pinnate and palmate venation
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single blade not divided into leaflets
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simple leaves
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blade divided into smaller leaflets
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compound leaves
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leaflets originating at single point at the end of a petiole
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palmately compound
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leaflets come off a central extension of the petiole
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pinnately compound
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extention of a petiole
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rachis
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3 types of tissue in dicot leaves
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epidermis, mesophyll, and veins
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tightly packed parenchyma cells
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palisade mesophyll
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loosly packed parenchyma cells
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spongy mesophyll
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spongy mesophyll function:
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store starch
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monocot tissues
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epidermis, buliform cells, 1 mesophyll layer, bundle sheaths
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plants found in arid conditions
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xerophytes
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plants found in wet conditions, floating
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hydrophytes
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starshaped cells
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astrosclerids
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plants in normal conditions
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mesophytes
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in the main vein of the leaf, where is xylem and phloem found?
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xylem- on top of leaf, phloem- on bottom
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spongy mesophyll cells that have lots of air spaces in them are called
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aerenchema cells
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