Under the

International Code of Nomenclature for algae, fungi, and plants The ''International Code of Nomenclature for algae, fungi, and plants'' (ICN) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups of organisms, all those "trad ...

(ICN), Rosidae is a

botanical name A botanical name is a formal scientific name conforming to the ''International Code of Nomenclature for algae, fungi, and plants'' (ICN) and, if it concerns a plant cultigen, the additional cultivar or Group epithets must conform to the ''Interna ...

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 Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Rosaceae Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera. The name is derived from the type genus ''Rosa''. Among the most species-rich genera are '' Alchemilla'' (270), ''Sorb ...

. Under Phylocode, Rosidae is a

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English ter ...

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 ''Gunnera manicata'', known as Brazilian giant-rhubarb or giant rhubarb, is a species of flowering plant in the family Gunneraceae from the coastal Serra do Mar Mountains of Santa Catarina, Parana and Rio Grande do Sul States, Brazil. It is a ...

'' nor ''

Helianthus annuus The common sunflower (''Helianthus annuus'') is a large annual forb of the genus ''Helianthus'' grown as a crop for its edible oily seeds. Apart from cooking oil production, it is also used as livestock forage (as a meal or a silage plant), a ...

'' nor '' Saxifraga mertensiana'' nor ''

Stellaria media ''Stellaria media'', chickweed, is an annual and perennial flowering plant in the family Caryophyllaceae.Fernald, M. L. 1950. “Gray's Manual of Botany”. Eight Edition. American Book Company, New York, NY. 1632 pp. It is native to Euras ...

'' nor '' Viscum album''. A well-known example of Rosidae as governed by the ICN was in the Cronquist system. In the 1981, original, version of that system, the circumscription was as follows. Arthur John Cronquist. 1981. ''An Integrated System of Classification of Flowering Plants''. Columbia University Press: New York, NY, USA. * subclass Rosidae The Phylocode definition includes

Crossosomatales The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots. Description Species assigned to the Crossosomatales have in common flowers that are positioned solitarily, wit ...

, Geraniales,

Myrtales The Myrtales are an order of flowering plants placed as a sister to the eurosids II clade as of the publishing of the ''Eucalyptus grandis'' genome in June 2014. The APG III system of classification for angiosperms still places it within the e ...

, Fabidae ( Celastrales, Cucurbitales,

Fabales The Fabales are an order of flowering plants included in the rosid group of the eudicots in the Angiosperm Phylogeny Group II classification system. In the APG II circumscription, this order includes the families Fabaceae or legumes (including ...

, Fagales, Huaceae, Oxalidales, Malpighiales, Rosales and Zygophyllales), Malvidae ( Brassicales, Huerteales, Malvales, and Sapindales) as they are defined in the

APG III system The APG III system of flowering plant classification is the third version of a modern, mostly molecular-based, system of plant taxonomy being developed by the Angiosperm Phylogeny Group (APG). Published in 2009, it was superseded in 2016 by a fu ...

. This definition was formulated in 2007, and is agnostic on the inclusion or exclusion of Picramniales and

Vitales The Vitaceae are a family of flowering plants, with 14 genera and around 910 known species, including common plants such as grapevines (''Vitis'' spp.) and Virginia creeper (''Parthenocissus quinquefolia''). The family name is derived from the g ...

. Philip D. Cantino, James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, and Michael J. Donoghue. 2007. Electronic Supplement: pages E1-E44. To: Cantino et alii. 2007. "Towards a phylogenetic nomenclature of ''Tracheophyta''". ''Taxon'' 56(3):822–846. (see ''External links'' below). Since 2007, the phylogenetic positions of Picramniales and Vitales have been clarified. The position of Picramniales as sister to Malvidae

sensu stricto ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular c ...

requires it to be included among the rosids. Vitales is sister to the clade of all that must be included in the rosids and its inclusion is optional. In APG III, it was included. There is considerable overlap between the two definitions. Some apparent differences are the result of more broadly drawn orders in the second. Apiales, Cornales, Proteales and Santalales, and parts of Rafflesiales (sensu Cronquist) are excluded from the second, and many groups from Cronquist's

Hamamelidae Hamamelididae is an obsolete botanical name at the rank of subclass. Because some hamamelidid members bear aments (''i.e.'', catkins), this subclass has been formerly known as ''Amentiferae''. Based on molecular phylogeny works, Hamamelididae a ...

and Dillenidae are included. In both senses, the term " rosid" applies, as an adjective and noun, to members of the group. In the APG III system, which eschewed formal

s between the ranks of

class Class or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used differently ...

and

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ...

, the term "rosids" is used to define an informal clade corresponding to Rosidae as defined in the Phylocode.

References

{{reflist

External links

* ''Rosidae'' at th
TAMU Lab

Electronic Supplement to Cantino et alii
Plant subclasses bg:Розиди es:Rosidae no:Rosidae pl:Różowe