| Oxytheca | |
|---|---|
 | |
| Oxytheca perfoliata | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Subfamily: | Eriogonoideae |
| Genus: | Oxytheca Nutt. |
| Species | |
Oxytheca is a genus of plants in the family Polygonaceae with seven species found in dry and temperate parts of the Americas. [1] The taxonomy of this genus is in flux, with some species often listed under tentative new names. [2]
Species include:
The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus Polygonum, and was first used by Antoine Laurent de Jussieu in 1789 in his book, Genera Plantarum. The name may refer to the many swollen nodes the stems of some species have, being derived from Greek [poly meaning 'many' and gony meaning 'knee' or 'joint']. Alternatively, it may have a different origin, meaning 'many seeds'.
Coccoloba is a genus of about 120–150 species of flowering plants in the family Polygonaceae, which is native to the Neotropics. There is no overall English name for the genus, although many of the individual species have widely used common names.
Eriogonum is a genus of flowering plants in the family Polygonaceae. The genus is found in North America and is known as wild buckwheat. This is a highly species-rich genus, and indications are that active speciation is continuing. It includes some common wildflowers such as the California buckwheat.
Ericameria is a genus of North American shrubs in the family Asteraceae.
Benedictus Hubertus Danser, often abbreviated B. H. Danser, was a Dutch taxonomist and botanist. Danser specialised in the plant families Loranthaceae, Nepenthaceae, and Polygonaceae.
Rumex palustris, or marsh dock, is a plant species of the genus Rumex, found in Europe. The species is a dicot belonging to the family Polygonaceae. The species epithet palustris is Latin for "of the marsh" which indicates its common habitat.
Viguiera is a genus of flowering plants in the family Asteraceae. The name honours French physician L. G. Alexandre Viguier (1790–1867). It contains around 150 species, which are commonly known as goldeneyes and are native to the New World. These are herbs to bushy shrubs that bear yellow or orange daisy-like flowers.
Triplaris is a genus of plants in the family Polygonaceae. Ant tree is a common name for plants in this genus.
Oxyria is a genus of plants in the family Polygonaceae with three accepted species as of March 2019. It has a circumboreal distribution.
Koenigia is a genus of plants in the family Polygonaceae. The genus Aconogonon has been merged into Koenigia.
Calligonum is a genus of plants in the family Polygonaceae with about 80 species across the Mediterranean Sea region, Asia and North America.
Ribes divaricatum is a species in the genus Ribes found in the forests, woodlands, and coastal scrub of western North America from British Columbia to California. The three accepted varieties have various common names which include the word "gooseberry". Other common names include coast black gooseberry, wild gooseberry, Worcesterberry, or spreading-branched gooseberry.
John Thomas Howell was an American botanist and taxonomist. He became an expert of Eriogonum (buckwheat) species, which are widely represented in the native California flora.
Pteroxygonum is a plant genus in the family Polygonaceae. As of March 2019, two species are recognized. Their native range is from Tibet to southeast China.
Reynoutria is a genus of flowering plants in the family Polygonaceae. The genus is native to eastern China, Eastern Asia and the Russian Far East, although species have been introduced to Europe and North America. Members of the genus, including R. japonica and its hybrid with R. sachalinensis, are highly invasive plants.
Polygonoideae is a subfamily of plants in the family Polygonaceae. It includes a number of plants that can be highly invasive, such as Japanese knotweed, Reynoutria japonica, and its hybrid with R. sachalinensis, R. × bohemica. Boundaries between the genera placed in the subfamily and their relationships have long been problematic, but a series of molecular phylogenetic studies have clarified some of them, resulting in the division of the subfamily into seven tribes.
Acanthoscyphus is a monotypic genus in the family Polygonaceae that contains the single species Acanthoscyphus parishii, which is sometimes called Parish's oxytheca. This species is native and endemic to southern California.
Paphiopedilum parishii is a species of orchid found in northern and western Thailand, Laos, Myanmar, Yunnan and Assam, in montane forests at 1200–2200 m above sea level. It is named after Charles Samuel Pollock Parish, an English botanist and avid plant collector who had a particular interest in the flora of Myanmar.
Johanneshowellia is a genus of flowering plants belonging to the family Polygonaceae.
Charles Samuel Pollock Parish (1822–1897) was an Anglo-Indian clergyman and botanist who served as chaplain to the forces of the Honourable East India Company in Burma. With his wife Eleanor he collected and painted plants, chiefly orchids, identifying and naming a number of species new to science. Several species are named in his honour.
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