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Science 9/21/14

Rubbing part 2

blade the flat part of a leaf
vein the tubelike structure of a leaf blade that offers support to the leaf and transports materials to and from the leaf.
venation pattern the design of leaf veins
Rubbing allows us to see the leaf venation
Leaf characteristics include shape, venation and margin
Leaf blades come in many shapes
Linear leaf blades are long and slender
Cordate leaf blades are heart shaped
Deltoid leaf blades are triangular
Leafs can be grouped based on venation type parallel, palmate and pinnate
Parallel leaves have veins that look like many straight lines all running in the same direction.
Types of parallel leaves Iris, lily bamboo corn all grass
Types of palmate leaves sycamore, broadleaf and maple
Types of pinnate leaves cottonwood, elm, fruit and nut trees magnolia
palmate leaves have several main veins ahtat all start from one point near the base. The veins resemble the palm of the hand and tigers.
pinnate leaves have one main vein with many large veins that branch off sideways all along the main vein. They look like feathers.
Leaf margins or edges can be smooth, toothed, jagged, scalloped, wavy or sawlike.
What are the 3 types of venation patterns? Parallel, Palmate, and Pinnate
Margin the edge of a leaf
Created by: Evans206