Xyridaceae is the
botanical nameA botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if the plant is a cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants...
of a
familyIn biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus...
of flowering plants. Such a family has been recognized by many taxonomists and is known as the Yellow-eyed-grass Family.
The
APG II systemA modern system of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in*Angiosperm Phylogeny Group . An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical...
, of 2003 (unchanged from the
APG systemA modern system of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistic analysis of the DNA sequences of three genes, two chloroplast genes and one gene...
, of 1998), also recognizes this family, and assigns it to the order
PoalesPoales is a large order of flowering plants in the monocotyledons, and includes families of plants such as the grasses, bromeliads, and sedges. Sixteen plant families are currently recognized by botanists to be part of Poales....
in the clade
commelinidsIn plant taxonomy, the name commelinids is used by the APG II system for a clade within the monocots, which in its turn is a clade within the angiosperms...
, in the monocots. This treatment in APG II represents a slight change from the
APG systemA modern system of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistic analysis of the DNA sequences of three genes, two chloroplast genes and one gene...
, of 1998, which had recognized the family Abolbodaceae for some of the plants included here: that family was unplaced as to order, but was assigned to this same clade (although APG used the spelling "commelinoids").
The family contains almost three hundred species in five genera, but most of the species are found in the genus
XyrisXyris is the botanical name of a genus of flowering plants in the Yellow-eyed-grass family. The genus counts over two hundred fifty species, with the center of distribution in the Guiana's....
(see also
AbolbodaAbolboda is a genus of flowering plants, traditionally and nowadays assigned to family Xyridaceae. It comprises about 17 species in South America, on marshy savanna.List of species...
).
Xyridaceae is the
botanical nameA botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if the plant is a cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants...
of a
familyIn biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus...
of flowering plants. Such a family has been recognized by many taxonomists and is known as the Yellow-eyed-grass Family.
The
APG II systemA modern system of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in*Angiosperm Phylogeny Group . An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical...
, of 2003 (unchanged from the
APG systemA modern system of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistic analysis of the DNA sequences of three genes, two chloroplast genes and one gene...
, of 1998), also recognizes this family, and assigns it to the order
PoalesPoales is a large order of flowering plants in the monocotyledons, and includes families of plants such as the grasses, bromeliads, and sedges. Sixteen plant families are currently recognized by botanists to be part of Poales....
in the clade
commelinidsIn plant taxonomy, the name commelinids is used by the APG II system for a clade within the monocots, which in its turn is a clade within the angiosperms...
, in the monocots. This treatment in APG II represents a slight change from the
APG systemA modern system of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistic analysis of the DNA sequences of three genes, two chloroplast genes and one gene...
, of 1998, which had recognized the family Abolbodaceae for some of the plants included here: that family was unplaced as to order, but was assigned to this same clade (although APG used the spelling "commelinoids").
The family contains almost three hundred species in five genera, but most of the species are found in the genus
XyrisXyris is the botanical name of a genus of flowering plants in the Yellow-eyed-grass family. The genus counts over two hundred fifty species, with the center of distribution in the Guiana's....
(see also
AbolbodaAbolboda is a genus of flowering plants, traditionally and nowadays assigned to family Xyridaceae. It comprises about 17 species in South America, on marshy savanna.List of species...
). The species are mostly tropical and subtropical.
The
Cronquist systemA system of plant taxonomy, the Cronquist system is a scheme for the classification of flowering plants . This system 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...
, of 1981, also recognized such a family and placed it in the order
CommelinalesCommelinales is the botanical name of an order of flowering plants. It's considered that the Commelinales together with Zingiberales evolved in the Late Cretaceous around 80 millions of years ago...
in the subclass
CommelinidaeCommelinidae 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 Commelinaceae...
in class
LiliopsidaLiliopsida is a botanical name for the class containing the family Liliaceae . It is considered synonymous with the name monocotyledon. Publication of the name is credited to Scopoli : see author citation...
in division Magnoliophyta.
The
Wettstein systemA system of plant taxonomy, the Wettstein system recognised the following main groups, according to* I. phylum Schizophyta*::: 1. classis Schizophyceae*::: 2. classis Schizomycetes* II. phylum Monadophyta* III. phylum Myxophyta...
, last update in 1935, placed the family in order Enantioblastae.
Xyris torta or Twisted Yellow-Eyed Grass is on
MinnesotaMinnesota is a state in the Midwestern region of the United States. The twelfth largest state by area in the U.S., it is the twenty-first most populous, with 5.2 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the...
's
endangered speciesAn endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters. Also it could mean that due to deforestation there may be a lack of food and/or water...
list.
External links