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Petal
Anther
Angiosperm Perfect FlowerPerfect flowers have both male (staminate) and female (pistillate) reproductive parts
Filament
Sepal
Stamen StigmaStyleOvaryOvule
Pistilor
Carpel
Peduncle
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Male PartsFemale Parts
Terminal Bud
Leaf Scar
Lateral Bud
Bud Scale - three are visible in this drawing
Terminal Bud Scale Scar
One year’s growth
Vascular Bundle Traces
PithLenticel
Angiosperm Woody Stem
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Bud scales are small scale-like modified leaves that cover the bud during its winter dormancy. When the terminal bud breaks dormancy in the spring, these bud scales are shed, leaving behind the scars where they were attached.
Leaf Arrangement
Alternate Opposite Whorled
Alternate – Leaves and buds are spaced in alternating fashion along the stemOpposite – Leaves and buds are directly across from each other on the stemWhorled – Three or more leaves and buds are present at a single node
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Stipule
Petiole
Bud
Midrib
Stem
Simple Leaf
KEY POINT: A leaf will ALWAYS have a bud at the base of the petiole.
If it does not have a bud, it is leaflet, not a leaf.
Blade
Leaf
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Compound Leaf
Leaflet
Rachis
Bud
Stem Petiolule
No Bud
Leaflet
Because the bud is at the base of the rachis, not at the base of the petiolule, this diagram does not show seven simple leaves, but instead a single compound leaf comprised of seven leaflets
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Types of Compound Leaves
Pinnately Compound Palmately Compound
Bud Bud
In a palmately compound leaf, each leaflet is attached to a common point on the rachis, but leaflets in a pinnately compound leaf are not.
To Practice Quiz
Practice QuizName a flower part then click on the letter to see if you are correct
A
BC
D
E
FGH
I
Show Male (Staminate) Parts Show Female (Pistillate) Parts
To Practice Quiz on Twig Parts
Petal
Next Flower Part
All the petals are collectively referred to as the corolla
Anther
Next Flower Part
Anthers produce pollen required for pollination
Filament
Next Flower Part
Sepal
Next Flower Part
Sepals are collectively called the calyx
Stigma
Next Flower Part
When pollination occurs, pollen attaches to the stigma
Style
Next Flower Part
A tube from the pollen extends through the style to each ovule to deliver the male gamete to the ovule
Ovary
Next Flower Part
Ovule
Ovules develop into seeds when fertilized by pollen
Next Flower Part
Peduncle
Next Flower Part
Anther
Male (Staminate) Flower Parts
FilamentStamen
Next Flower Part
StigmaStyleOvaryOvule
Pistilor
Carpel
Female (Pistillate) Flower PartsFlowers can have multiple pistils (also called carpels) that can be
separate or fused together
Next Flower Part
A
F
B
E
C
I
G
H
D
Twig Practice QuizName a flower part then click on the letter to see if you are correct
To Leaf Practice Quiz
Terminal Bud
Next Stem Part
Lateral Bud
Next Stem Part
Terminal Bud Scale Scar from last year’s terminal bud
Next year’s terminal bud scale scar will appear here when the scale falls off
One year’s growth
Next Stem Part
Lenticel
Lenticels are thought to allow air into the plant interior
Next Stem Part
Bud Scale(One of three visible)
Bud Scale(One of five visible)
Next Stem Part
Leaf Scar
Leaf Scar
A leaf scar shows where the previous year’s leaf was attached to the stem
Next Stem Part
Vascular Bundle Traces
The vascular bundle traces show where the zylem entered the leaf petiole
Next Stem Part
Pith
The Pith is the central core of the stem
Next Stem Part
Leaf Practice Quiz
How many leaves are in this diagram? Answer
Leaf Practice Quiz
There is only one leaf pictured here. If this diagram pictured seven simple leaves, there would be a bud at the base of every leaf. Since there is only one bud this must be a single compound leaf
Bud
Next Question
Leaf Practice Quiz
What are the names of A, B and C? Answer
A
B
C
Leaf Practice Quiz
To answer this correctly you must first identify which is a simple leaf and which is a compound leaf by looking for the leaf bud.
In a simple leaf, the blade is attached to the petiole. In a compound leaf, the leaflet is attached to the petiolule. The petiolule is attached to the rachis.
A. Petiole
B. Rachis
C. Petiolule
Next Question
Leaf Practice Quiz
Which is a palmately compound leaf and which is a pinnately compound leaf?
Answer
A B
Leaf Practice Quiz
A – Pinnately Compound
A B
B – Palmately Compound
Next Question
Leaf Practice Quiz
Which leaf arrangement is opposite, alternate, and whorled?
Answer
A B C
Leaf Practice Test
C - AlternateA - Opposite B - Whorled
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