Escobaria duncanii

Escobaria duncanii
Systematics
Order :	Clove-like (Caryophyllales)
Family :	Cactus family (Cactaceae)
Subfamily :	Cactoideae
Tribe :	Cacteae
Genre :	Escobaria
Type :	Escobaria duncanii
Scientific name
	Escobaria duncanii
	( Hester ) Backeb.

Escobaria duncanii is a species of plant in the genus Escobaria from the cactus family(Cactaceae). The specific epithet duncanii honors the American Frank Duncan on whose pit field the species was discovered.

description

Escobaria duncanii grows individually or in groups. The top-shaped, almost spherical to inverted conical green shoots reach heights of growth of 2.5 to 6 centimeters and the same diameter. The shoots are covered by the dense thorns. Their non-solid, cylindrical warts are up to 6 millimeters long. The 30 to 75 white thorns have a darker tip and cannot be divided into central and radial spines. They are slender, fragile, needle-like, straight to curved or twisted, and up to 2 inches long.

The pink flowers are up to 3 inches long. The red, club-shaped fruits are up to 10 millimeters in length.

Distribution, systematics and endangerment

Escobaria duncanii is common in the United States in southern New Mexico and western Texas .

The first description as Escobesseya duncanii by John Pinckney Hester was published in 1945. Curt Backeberg placed the species in the genus Escobaria in 1961 .

Further nomenclature synonyms are Coryphantha duncanii (Hester) LDBenson (1969), Mammillaria duncanii (Hester) D.Weniger (1970, nom. Inval. ICBN -Article 33.3) and Escobaria dasyacantha var. Duncanii (Hester) NPTaylor (1983).

In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.

proof

literature

Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 274 .

Individual evidence

↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 70.
↑ John Pinckney Hester: Escobesseya gen. Nov. In: Desert Plant Life . Volume 17, Pasadena 1945, p. 23.
^ Curt Backeberg: Die Cactaceae: Handbuch der Kakteenkunde . Volume V, 1st edition, Jena 1961, pp. 2966-2967.
↑ Escobaria duncanii in the IUCN Red List of Threatened Species 2013.2. Posted by: Heil, K., Terry, M. & Corral-Díaz, R., 2009. Retrieved December 17, 2013.

Web links

Photos by Escobaria duncanii

[1] Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 70.

[2] John Pinckney Hester: Escobesseya gen. Nov. In: Desert Plant Life . Volume 17, Pasadena 1945, p. 23.

[3] Curt Backeberg: Die Cactaceae: Handbuch der Kakteenkunde . Volume V, 1st edition, Jena 1961, pp. 2966-2967.

[4] Escobaria duncanii in the IUCN Red List of Threatened Species 2013.2. Posted by: Heil, K., Terry, M. & Corral-Díaz, R., 2009. Retrieved December 17, 2013.