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- Dicotyledonous plants (Class Magnoliopsida) are thought to be the most primitive flowering plants. They are defined by several characteristics. Similar to gnetophytes, all dicots germinate producing two seed leaves, hence dicotyledons.
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Dicotyledonous plants (Class Magnoliopsida) are thought to be the most primitive flowering plants. They are defined by several characteristics. Similar to gnetophytes, all dicots germinate producing two seed leaves, hence dicotyledons.
Magnoliopsida is a valid botanical name for a class of flowering plants. By definition the class will include the family Magnoliaceae , but its circumscription can otherwise vary, being more inclusive or less inclusive depending upon the classification system being discussed.
Traditionally, the dicots have been called the Dicotyledones (or Dicotyledoneae), at any rank. If treated as a class, as they are within the Cronquist system, they could be called the Magnoliopsida after the type genus Magnolia.
According to the latter systems, the Magnoliopsida includes all flowering plants, therefore, including not only the dicotyledons (under a subclass Magnoliidae) but also the monocotyledons (in another subclass Liliidae).
Dicotyledon, or dicot, any member of the flowering plants that has a pair of leaves, or cotyledons, in the embryo of the seed. There are about 175,000 known species of dicots. Most common garden plants, shrubs and trees, and broad-leafed flowering plants such as magnolias and roses are dicots.
- The Editors of Encyclopaedia Britannica
May 3, 2017 · Thus, "flowers" are structures that distinguish plants in the Division Magnoliophyta from plants in the other divisions of the Kingdom Plantae. Observe a flower, and you know you are examining an angiosperm. However, not all angiosperms have obvious, showy flowers.
This is meant to suggest that the Magnoliidae is the most ancestral of the dicot subclasses and that the other subclasses are derived from it (except for the Asteridae, which would be viewed as having been derived from the Rosidae).
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