Derrick has taught biology and chemistry at both the high school and college level. He has a master's degree in science education.
Definition of Monocotyledon Plants
Cotyledons are a significant part of the embryo found in a seed. They are the first parts of a seedling to emerge from the soil when it germinates. Monocotyledons are plants that have only one cotyledon. They also have other characteristics, such as flower parts in multiples of threes. This means they could have three, six or nine petals, or they could have sepals that make up their flowers. They also have adventitious roots. These are roots that can grow from almost any part of the plant that comes into contact with the soil, such as the stem. Also, if you look closely at the leaves of a monocotyledon plant, you will see that the veins of the leaves are parallel.
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Examples of Monocotyledon Plants
Do you like to eat onions? The part of the onion plant that we actually eat is a group of compressed leaves. If you look closely at them, you will see that the veins of the leaves all run parallel, demonstrating that the onion is a monocotyledon plant.
Garlic is also a monocotyledon. As the plant begins to grow, one cotyledon emerges from the soil. It also has the trademark parallel veins in the leaves.
Lilies are very popular flowers. If you look closely at a lily flower, you will notice they have six sepals, six petals and six stamens. This number is significant because it is a multiple of three. All monocotyledons have flower parts in multiples of three.
Another example of a monocotyledon plant is the spiderwort. If you examine this plant, you will see flower parts in multiples of three and veins inside of the leaves that run parallel to one another.
Tulips are classic examples of monocotyledons.
One characteristic of monocotyledon plants is adventitious roots. These are roots that do not grow underground from one point like the traditional roots most people envision that plants have. If you are ever in the tropics and see a royal palm tree, you will see its adventitious prop roots that help support the tree. These roots make the royal palm a monocotyledon.
Let's review. Monocotyledons are any plants that have flower parts in multiples of three, leaf veins that run parallel and adventitious roots. Common examples include tulips, onions, garlic and lilies.
When you have finished studying this lesson on monocotyledon plants, make sure that you can:
- Characterize monocotyledons
- Recite some examples of monocotyledons
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Monocotyledon Plants: Examples, Definition & Pictures
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