PA Themes
Leaf Types
Leaf Margins
Definitions
Leaf Arrangement
100
Pennsylvania's State Tree
What is the Hemlock?
100
A leaf composed of a number of leaflets on a common stalk
What is a compound leaf?
100
A leaf that is smooth around the entire edge.
What is entire?
100
Leaf-like part of a compound leaf.
What is a leaflet?
100
Most common leaf arrangement
What is alternate?
200
Pennsylvania's State Fish
What is the Brook Trout?
200
A leaf that is not divided into parts.
What is a simple leaf?
200
A margin notched like a saw, with teeth pointing up toward the apex (tip).
What is serrate?
200
A small paired usually leaflike outgrowth occurring at the base of a leaf or its stalk.
What is stipules?
200
Least common leaf arrangement
What is whorled?
300
Pennsylvania's state dog
What is the Great Dane?
300
A leaf resembling an open hand, having lobes radiating from a common point.
What is a palmate leaf?
300
A Margin with deep rounded edges
What is lobed?
300
The stalk by which a leaf is attached to a stem. Also called leafstalk.
What is a Petiole?
300
When leaves are arranged in a alternating pattern along a stem.
What is alternate?
400
Pennsylvania's state insect
What is the firefly?
400
A leaf resembling a feather, having the leaflets on each side of a common axis.
What is a pinnate leaf?
400
When a leaf has triangular, “tooth-like” edges.
What is dentate?
400
A large strengthened vein along the midline of a leaf.
What is the midrib?
400
Leaves are arranged on a stem directly across from each other.
What is opposite?
500
Pennsylvania's state fossil
What is the trilobite?
500
Leaf type found on PA's state tree
What is scalelike?
500
A Margin notched like a saw with teeth pointing toward the apex (tip), and on each of those teeth there are even smaller teeth.
What is double-serrate?
500
The stalk of a pinnately compound leaf.
What is the rachis?
500
When 3 or more leaves are attached at a single node along a stem.
What is whorled?
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