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26 Cards in this Set
- Front
- Back
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four basic leaf shapes
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broad, flat leaves; long, narrow leaves; needle-like leaves; and scaly leaves
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the most common leaf patterns
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opposite, alternate, or whorled
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opposite leaves
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leaves are opposite when they grow in pairs from a point on the stem, but from different sides
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alternate leaves
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alternate leaves are individual leaves that grow in an alternationg patern along the stem
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whorled leaves
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a whorl consists of three or more leaves growing from the same point or node on the stem
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rosette
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a cluster of leaves growing around the base of a plant
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leaf margins
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leaf edges
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entire
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leave that have margins that are smooth and unbroken
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toothed
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leaves that sometimes have small, sharp teeth and sometimes have large, blunt teeth
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wavy
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edges that are curved bumps that resemble ripples on the surface of a lake
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lobed
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a leaf that has extensions of itself (like your ear lobe)
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petiole
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a stalk to which a blade is attached
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blade
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the broad, flat portion of a leaf
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simple leaves
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leaves which have only one blade attached to a petiole
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compound leaf
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a leaf that has more than one blade joined to a petiole
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leaflets
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the multiple blades of a compound leaf
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sessile
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leaves which have no petioles but instead attach directly to the stem
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venation
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vein patterns
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three types of venation
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parallel, pinnate, and palmate
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parallel venation
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the main veins run seemingly parallel to each other
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what type of venation do monocots have?
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parallel venation
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what type of venation do dicots have?
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branching venation
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pinnate venation
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has small veins branching from one main vein
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palmate venation
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has small veins branching from more than one main vein
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palmately compound
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what a compound leaf is called when all the leaflets attach to a common point at the tip of the petiole
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pinnately compound
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what a compound leaf is called if the leaflets are located at intervals along the petiole
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