Rosidae

Rosidae

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

Under Phylocode Rosidae is a clade defined as the most inclusive crown clade containing "Rosa cinnamomea" ["sensu" L. 1753 "non" L. 1759] but not "Berberidopsis corallina" nor "Dillenia indica" nor "Gunnera manicata" nor "Helianthus annuus" nor "Saxifraga mertensiana" nor "Stellaria media" nor "Viscum album". cite journal | last= Cantino | first= Philip D. | coauthors= James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, & Michael J. Donoghue | year=2007 | title= Towards a phylogenetic nomenclature of "Tracheophyta" | journal=Taxon | volume=56 | issue=3 | pages=E1-E44 | url = http://www.ingentaconnect.com/content/iapt/tax/2007/00000056/00000003/art00020]

A well-known usage of the former sense is in the Cronquist system; in the 1981, original, version of that system the circumscription was:

* subclass Rosidae

The Phylocode definition includes Crossosomatales, Geraniales, Myrtales, Fabidae (Celastrales, Cucurbitales, Fabales, Fagales, Huaceae, Oxalidales, Malpighiales, Rosales and Zygophyllales), Malvidae (Brassicales, Dipentodontaceae, Gerrardinaceae, Malvales, Sapindales, and Tapisciaceae), "probably" Picramniaceae, and "possibly" Vitaceae.

There is considerable overlap between two definitions (some apparent differences are the result of the use of more broadly drawn orders in the second), but Apiales, Cornales, Proteales and Santales and parts of Rafflesiales are excluded from the second, and many groups from Cronquist's Hamamelidae and Dillenidae are included.

In both senses the term rosid applies, as an adjective and noun, to members of the group. In the APG and APG II systems, which eschewed formal formal botanical names between the ranks of class and order the term rosids is used to define an informal clade corresponding to the PhyloCode (Cantino "et al") sense.

References

External links

"Rosidae" at the [http://www.csdl.tamu.edu/FLORA/tfplab/rosidae.htm TAMU Lab]


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