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Family of flowering plants From Wikipedia, the free encyclopedia
The Polygalaceae or the milkwort family are made up of flowering plants in the order Fabales. They have a near-cosmopolitan range, with about 27 genera and ca. 900 known species[2] of herbs, shrubs and trees. Over half of the species are in one genus, Polygala, the milkworts.
Polygalaceae | |
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Securidaca longipedunculata | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fabales |
Family: | Polygalaceae Hoffmanns. & Link[1] |
Type genus | |
Polygala | |
Tribes | |
Distribution of the Polygalaceae | |
Synonyms | |
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The family was first described in 1809 by Johann Hoffmansegg and Johann Link.[3] In 1896, Robert Chodat split it into 3 tribes. A fourth tribe was split off from the tribe Polygaleae in 1992.[4] Under the Cronquist classification system, Polygalaceae were treated in a separate order of their own, Polygalales. Currently, according to the Angiosperm Phylogeny Group, the family belongs in Fabales.
Polygalaceae are annual or perennial herbs, shrubs, trees or lianas.[5] Its zygomorphic, hermaphrodite, bisexual flowers have 3-5 petals and 5 sepals.[6][7] Its leaves are usually alternate, but may be opposite, fascicled, or verticillate.[6] Each flower usually contains 8 stamens, though this may range from 3 to 10. They are usually in 2 series.[7] The fruits of each plant can be a capsule, samara, or drupe.[6]
The Polygalaceae comprise the following genera,[6] with tribes based on various sources.[8][9][10][11][12][13]
Modern molecular phylogenetics suggest the following relationships:[13][14][15][16][17][18]
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