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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. All dicots have other similar characteristics.
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).
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The remaining dicots (palaeodicots or basal angiosperms) may be kept in a single paraphyletic class, called Magnoliopsida, or further divided. Some botanists prefer to retain the dicotyledons as a valid class, arguing its practicality and that it makes evolutionary sense.
In some schemes, the eudicots are treated as a separate class, the Rosopsida (type genus Rosa ), or as several separate classes. The remaining dicots (palaeodicots) may be kept in a single paraphyletic class, called Magnoliopsida, or further divided.
- MagnoliopsidaBrongniart
- Plantae
- Magnoliophyta
Magnoliopsida is a valid botanical name for a class of flowering plants. [1] . 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. Magnolia flowers. Classification. Cronquist and Takhtajan systems.
A Dicots. In the dicots, C 4 photosynthesis is taxonomically diverse, indicating numerous independent origins (Table II). At least 86 dicot genera contain C 4 species, with the Chenopodiaceae
May 3, 2017 · Class Magnoliopsida (dicots) Members of the Class Magnoliopsida are defined partly on the basis of the seed or seedling having two cotyledons, most obvious at germination.
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