Escobaria
Escobaria is a genus of flowering plants of the cactus family ( Cactaceae ). The botanical name honors the Mexican brothers Rómulo Escobar Zermann (1882-1946) and Numa Pompilio Escobar Zermann ( 1874-1949 ).
Description
The species of the genus Escobaria are low-growing, single or cushion bildene plants with down - spherical to cylindrical stems. You do not have nectar glands and no ribs. The warts on old plants are often corky. The elongated areolae extending from the tip to the center warts. The usually short, fine spines are upright and wrap the plant a dense.
The flowers often do not open fully. The corolla tube is short and bald. The perianth is ciliate on the edges.
The usually bare and red, sometimes green or pink fruits are spherical or oblong. They contain broad - oval to circular, brown or blackish brown, dotted seeds 1.0 to 1.7 millimeters in diameter.
Systematics and distribution
According to Nigel Paul Taylor the genus Escobaria into three sections and groups can be divided. Following species belong to the genus:
- Section Pleurantha N.P.Taylor: Escobaria chihuahuensis Britton & Rose Escobaria chihuahuensis subsp. chihuahuensis
- Escobaria chihuahuensis subsp. henricksonii ( Glass & R.A.Foster ) N.P.Taylor
- Escobaria tuberculous ( Engelm. ) Britton & Rose
- Sneedii group: Escobaria albicolumnaria Hester
- Escobaria laredoi ( Glass & R.A.Foster ) N.P.Taylor
- Escobaria orcuttii Boed. Escobaria orcuttii var orcuttii
- Escobaria orcuttii var koenigii Castetter, P.Pierce & KHSchwer.
- Escobaria orcuttii var macraxina Castetter, P.Pierce & KHSchwer.
- Escobaria sneedii subsp. sneedii
- Escobaria sneedii subsp. leei (Rose ex Boed. ) D.R.Hunt
- Escobaria alversonii ( J.M.Coult. ) N.P.Taylor
- Escobaria deserti ( Engelm. ex S.Watson ) Buxb.
- Escobaria hesteri ( Y.Wright ) Buxb.
- Escobaria vivipara ( Nutt. ) Buxb.
- Escobaria emskoetteriana ( Quehl ) Borg
- Dasyacantha group: Escobaria dasyacantha ( Engelm. ) Britton & Rose Escobaria dasyacantha subsp. dasyacantha
- Escobaria dasyacantha subsp. chaffeyi ( Britton & Rose) N.P.Taylor
- Escobaria cubensis ( Britton & Rose) D.R.Hunt
- Escobaria missouriensis ( Sweet) D.R.Hunt Escobaria missouriensis subsp. missouriensis
- Escobaria missouriensis subsp. asperispina ( Boed. ) N.P.Taylor
The type species of the genus Mammillaria is tuberculous. Synonyms of the genus are Neobesseya Britton & Rose, Fobea Fric, Escobesseya Hester, Cochiseia WHEarle and Escocoryphanta Doweld.
Escobaria is common in southern Canada and south of the western states of the United States to the north of Mexico. Escobaria cubensis is home to the only species of the genus in Cuba.
Botanical history
The genus Escobaria 1923 erected by Nathaniel Lord Britton and Joseph Nelson Rose in The Cactaceae. It included then eight species, six of which were published as original descriptions in the same plant. Two of the species came from Karl Moritz Schumann subgenus of the genus Mammillaria coryphantha. The genus has since moved quite a taxonomic past. Alwin Berger accepted 1929 Illustrated manuals succulent plants: cacti the genus only in the context of the genus coryphantha. John Pinckney Hester took both classes in 1945 to the new genus Escobesseya together.
Since the publication by Franz Buxbaum in 1951, the genre has been recognized in varying extent. Your Position in the systematics of cactus changed but still several times.
Two species that were formerly Escobaria, now form the separate genus Acharagma.