| Pelecyphora hesteri | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Genus: | Pelecyphora |
| Species: | P. hesteri |
| Binomial name | |
| Pelecyphora hesteri (Y.Wright) D.Aquino & Dan.Sánchez | |
Pelecyphora hesteri is a species of flowering plant in the family Cactaceae, native to Texas, United States.
Pelecyphora hesteri grows with many shoots, is often richly branched and forms cushions. The egg-shaped to spherical shoots reach heights of 2.5 to 5 centimeters and diameters of 2.5 to 3.5 centimeters. Their wide and conspicuous warts are 7 to 12 millimeters long. The one to four white central spines are similar to the marginal spines and are up to 1.5 centimeters long. The twelve to 22 white marginal spines are 0.7 to 1.5 centimeters long.
The light pink to light purple flowers are 1.5 centimeters in diameter and up to 2.3 centimeters long. The green to yellowish, almost spherical fruits are 6 to 7 millimeters long. When ripe they become dry. [1]
Pelecyphora hesteri is distributed in Brewster County, Texas, in the United States.
The first description as Coryphantha hesteri by Ysabel Wright was published in 1932. [2] The specific epithet hesteri honors the American cactus lover John Pinckney Hester from Fredonia, one of the leading researchers of the Big Bend area. Franz Buxbaum placed the species in the genus Escobaria in 1951. [3] Further nomenclature synonyms are Escobesseya hesteri (Y.Wright) Hester (1945, nom. inval. ICBN article 34.1), Mammillaria hesteri (Y.Wright) D.Weniger (1970, nom. inval. ICBN article 34.1) and Escobaria hesteri (Y.Wright) Buxb..
In 1984, the International Organization for Succulent Plant Study set up a working party, now called the International Cactaceae Systematics Group, to produce a consensus classification of the cactus family, down to the level of genus. Their classification has been used as the basis for systems published since the mid-1990s. Treatments in the 21st century have generally divided the family into around 125–130 genera and 1,400–1,500 species, which are then arranged in a number of tribes and subfamilies. However, subsequent molecular phylogenetic studies have shown that a very high proportion of the higher taxa are not monophyletic, i.e. they do not contain all of the descendants of a common ancestor. As of August 2023, the internal classification of the family Cactaceae remained uncertain and subject to change. A classification incorporating many of the insights from the molecular studies was produced by Nyffeler and Eggli in 2010.
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Pelecyphora missouriensis, the Missouri foxtail cactus and formerly Coryphantha missouriensis, is a species of low-growing North American cacti.
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Pelecyphora cubensis is a species of flowering plant in the family Cactaceae, native to Cuba.
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Pelecyphora dasyacantha is a species of flowering plant in the family Cactaceae, native to the Mexico.
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Pelecyphora zilziana is a species of flowering plant in the family Cactaceae, native to Mexico.
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Pelecyphora duncanii is a species of flowering plant in the family Cactaceae, native to the southern United States.
Pelecyphora robbinsiorum is a species of flowering plant in the family Cactaceae.
Media related to Pelecyphora hesteri at Wikimedia Commons
Data related to Pelecyphora hesteri at Wikispecies