Botany: Stems and Leaves 2
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- Plants can have both compound and simple types of leaves on a single species individual. T or F
- T. Juvenile leaves occur on younger parts of plants and may differ from adult leaves on more mature parts of plants. Acacia is an example: Juvenile leaves are compound. Adult leaves are simple.
- Each leaf is attached to a stem at a ___A___. The upper angle where a leaf joins a stem is the ___B___.
-
a) DEFINE: AXIL
b) node - in the ___A___ of each leaf is an ___B___ that can grow and develop into a branch with leaves or flowers on it. (fig9.6)
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A) AXIL
B) AXILLARY BUD - ___A___ leaves have a flat, undivided blade that is supported by a stalk called a ___B___. Name an example: __C___
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A) SIMPLE LEAVES
B) PETIOLE
c) redbud, elm, maple, etc. - The petiole is typically supported by rigid, thick-walled _____ cells.
- fiber
- In plants such as silk tree, the petiole includes a jointlike swelling called a ____A___ that enables the leaf to ___B___.
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A) PULVINUS
B) respond and move to environmental stimuli such as light and gravity - The ______ enables the leaf to respond and move to environmental stimuli such as light and gravity.
- PULVINUS
- Leaves of plants such as zinnia and stonecrops lack petioles and are called ______ leaves.
- SESSILE
- Which type of leaf has a blade divided into LEAFLETS that form in one plant.
- A) COMPOUND LEAVES
- Name the two types of compound leaves.
- PINNATELY AND PALMATELY
- ___a__ lack axillary buds, but each compound leaf has a single axillary bud at the base of its ____b____.
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A) LEAFLETS
B) petiole - ___A___ is one of two types of compound leaves and form in pairs along a central, stalk-like RACHIS. examples are: (B)
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A) PINNATELY
B)Ash, walnut, and some roses -
Leaflets of ___A___compound leaves attach at the same point, much as fingers that extend from your palm
Name some examples: ___B___ -
A) palmately
B) horse chestnut, marijuana, lupine, and shamrock - The leaves of a four-leaf clover are actually four _______ of a palmately compound leaf.
- leaflets
- Pinnately compound leaves form in pairs along a central, stalk-like _______.
- rachis