Rosopsida
Encyclopedia
Rosopsida Batsch
August Batsch
Dr August Johann Georg Karl Batsch was a German naturalist. He was a recognised authority on mushrooms, and also described new species of ferns, bryophytes, and seed plants.- Life and career :...

 1788 is a botanical name
Botanical name
A botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if it concerns a plant cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants...

 for a group of flowering plant
Flowering plant
The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

s recognized at the rank of class. The name is derived from that of the included family Rosaceae
Rosaceae
Rosaceae are a medium-sized family of flowering plants, including about 2830 species in 95 genera. The name is derived from the type genus Rosa. Among the largest genera are Alchemilla , Sorbus , Crataegus , Cotoneaster , and Rubus...

. The name has not been used in most of the more influential recent classification systems, such as the Cronquist system
Cronquist system
The Cronquist system is a taxonomic classification system of flowering plants. It was developed by Arthur Cronquist in his texts An Integrated System of Classification of Flowering Plants and The Evolution and Classification of Flowering Plants .Cronquist's system places flowering plants into two...

, the Thorne system, the Takhtajan system
Takhtajan system
A system of plant taxonomy, the Takhtajan system of plant classification was published by Armen Takhtajan, in several versions from the 1950s onwards. It is usually compared to the Cronquist system. Key publications:-External links:* Takhtajan system at...

 or the APG II system. As circumscribed in the Reveal system
Reveal system
A modern system of plant taxonomy, the Reveal system of plant classification was drawn up by the botanist J.L. Reveal , professor emeritus at the Norton Brown Herbarium, Maryland .The last update of the system was made in 1999...

 it is a subset of the dicots, a paraphyletic group recognized at various ranks in other systems, and includes:
  • subclass Caryophyllidae
    Caryophyllidae
    Caryophyllidae is a botanical name at the rank of subclass. At the moment there is no complete consensus about what orders it includes, except that it presumably contains the order Caryophyllales...

    subclass Hamamelididae
    Hamamelididae
    Hamamelididae is a botanical name at the rank of subclass. A well-known system that used this name is the Cronquist system, although in the disallowed spelling Hamamelidae...

    subclass Dilleniidae
    Dilleniidae
    Dillenidae is a botanical name at the rank of subclass....

    subclass Rosidae
    Rosidae
    Under the International Code of Botanical Nomenclature , Rosidae is a botanical name at the rank of subclass. Circumscription of the subclass will vary with the taxonomic system being used; the only requirement being that it includes the family Rosaceae....

    subclass Cornidae
    subclass Lamiidae
    subclass Asteridae
    Asteridae
    Asteridae is a clade of plants, known for their flowers. Asteridae has been ranked as a subclass, but this ranking has varied depending on the taxonomy being used...



Reveal's circumscription of the group corresponds largely to Cronquist's class Magnoliopsida
Magnoliopsida
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.-Cronquist and...

 (but minus subclass Magnoliidae
Magnoliidae
Magnoliids are a group of about 9,000 species of flowering plants, including magnolias, nutmeg, bay laurel, cinnamon, avocado, black pepper, and many others. They are characterized by trimerous flowers, pollen with one pore, and usually branching-veined leaves.-Classification:Traditionally,...

) and to the eudicots
Eudicots
Eudicots and Eudicotyledons are botanical terms introduced by Doyle & Hotton to refer to a monophyletic group of flowering plants that had been called tricolpates or non-Magnoliid dicots by previous authors...

 of the APG II system minus Ranunculales
Ranunculales
Ranunculales is an order of flowering plants. Of necessity it contains the family Ranunculaceae, the buttercup family, because the name of the order is based on the name of a genus in that family. Ranunculales belongs to a paraphyletic group known as the basal eudicots...

and some other early-branching groups.
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