1. Angiosperm Perfect Flower
Perfect flowers have both male (staminate) and female (pistillate) reproductive parts
Petal
Male Parts
Anther
Female Parts
Stamen
Filament
Stigma
Style
Pistil or
Carpel
Ovary
Ovule
Sepal
Peduncle
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2. Angiosperm Woody Stem Terminal Bud One year’s growth Lateral Bud
Terminal Bud Scale Scar
Bud Scale - three are visible in this drawing
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 Scar
Vascular Bundle Traces
Pith
Lenticel
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3. Leaf Arrangement Alternate Opposite Whorled
Alternate – Leaves and buds are spaced in alternating fashion along the stem
Opposite – Leaves and buds are directly across from each other on the stem
Whorled – Three or more leaves and buds are present at a single node
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4. Simple Leaf Midrib Blade Leaf Petiole Stipule Bud Stem
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.
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5. Compound Leaf Leaflet No Bud Rachis Leaflet Petiolule Stem Bud
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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6. Types of Compound Leaves
Bud
Bud
Pinnately Compound
Palmately Compound
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.
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7. Name a flower part then click on the letter to see if you are correct
Practice Quiz
Name a flower part then click on the letter to see if you are correct A B C E F G H D I
Show Male (Staminate) Parts
Show Female (Pistillate) Parts
To Practice Quiz on Twig Parts

8. All the petals are collectively referred to as the corolla
Next Flower Part

9. Anthers produce pollen required for pollination
Next Flower Part

10. Filament
Next Flower Part

11. Sepals are collectively called the calyx
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12. When pollination occurs, pollen attaches to the stigma
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13. A tube from the pollen extends through the style to each ovule to deliver the male gamete to the ovule
Style
Next Flower Part

14. Ovary
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15. Ovules develop into seeds when fertilized by pollen
Next Flower Part

16. Peduncle
Next Flower Part

17. Male (Staminate) Flower Parts
Anther
Stamen
Filament
Next Flower Part

18. Female (Pistillate) Flower Parts
Flowers can have multiple pistils (also called carpels) that can be separate or fused together
Stigma
Style
Pistil or
Carpel
Ovary
Ovule
Next Flower Part

19. Name a flower part then click on the letter to see if you are correct
Twig Practice Quiz
Name a flower part then click on the letter to see if you are correct A I B C E F D G H
To Leaf Practice Quiz

20. Terminal Bud
Next Stem Part

21. Lateral Bud
Next Stem Part

22. Next year’s terminal bud scale scar will appear here when the scale falls off
One year’s growth
Terminal Bud Scale Scar from last year’s terminal bud
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23. Lenticels are thought to allow air into the plant interior
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24. Bud Scale
(One of five visible)
Bud Scale
(One of three visible)
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25. A leaf scar shows where the previous year’s leaf was attached to the stem
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26. The vascular bundle traces show where the zylem entered the leaf petiole
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27. The Pith is the central core of the stem
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28. Leaf Practice Quiz
How many leaves are in this diagram?
Answer

29. Leaf Practice Quiz
Bud
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
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30. Leaf Practice Quiz A C B
What are the names of A, B and C?
Answer

31. Leaf Practice Quiz A. Petiole C. Petiolule B. Rachis
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.
Next Question

32. Leaf Practice Quiz A B
Which is a palmately compound leaf and which is a pinnately compound leaf?
Answer

33. Leaf Practice Quiz A B A – Pinnately Compound B – Palmately Compound
Next Question

34. Leaf Practice Quiz A B C
Which leaf arrangement is opposite, alternate, and whorled?
Answer

35. Leaf Practice Test A - Opposite B - Whorled C - Alternate
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