Echinocereus viereckii
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Echinocereus viereckii |
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Echinocereus viereckii is a species of plant in the genus Echinocereus from the cactus family(Cactaceae). The specific epithet honors the German plant collector Hans Wilhelm Viereck .
description
Echinocereus viereckii grows upright or more prostrate, branching at the base. The dull, shiny individual light green shoots are often up to 20 centimeters long and 4 to 4.5 centimeters in diameter. They are loosely covered in the apex with a white-yellowish areole felt , which is surmounted upright by a hyaline -yellowish thorn . The 8 to 9 ribs are very sharply separated at the top and run straight down; about 6 to 8 millimeters high. They are strongly indented between the areoles so that they come to sit on mammillaria-like cusps. The 7 to 9 radial spines spread horizontally, mostly very evenly distributed over the areole, mostly 5 to 7 millimeters long. The 4 central spines are thickened at the base and up to 2 centimeters long.
The funnel-shaped flowers are up to 11 centimeters in diameter and are purple-pink. The flower tube is glassy and thorns light golden brown.
Distribution, systematics and endangerment
Echinocereus viereckii is common in the Mexican states of Nuevo León and Tamaulipas .
It was first described in 1934 by Erich Werdermann .
The following species and varieties described are synonyms : Echinocereus morricalii Říha (1974) and Echinocereus viereckii var. Morricalii (Ríha) NPTaylor (1985).
The following subspecies are distinguished:
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Echinocereus viereckii subsp. viereckii Werderm. :
The subspecies comes from Tamaulipas near San Vincente near Jaumave at altitudes between 1500 and 2000 meters. -
Echinocereus viereckii subsp. morricalii (Ríha) NPTaylor :
The subspecies was originally described by Jan Říha in 1974 as Echinocereus morricalii . Nigel Paul Taylor included it as a subspecies to Echinocereus viereckii in 1997 . The subspecies occurs mainly in Nuevo León - southwest of the capital Monterrey in 300–400 meters altitude in shady places. -
Echinocereus viereckii subsp. huastecensis W.Blum, Mich.Lange & Rutow :
The subspecies was described in 1998 by Wolfgang Blum, Michael Lange and Jürgen Rutow. The subspecies occurs mainly in Nuevo Leon at the Huasteca Canon at altitudes between 500 and 550 meters.
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 Cactus Family . Timber Press, Portland (Oregon) 2001, ISBN 0-88192-498-9 , pp. 250-251 .
- Curt Backeberg , Frederik Marcus Knuth : Cactus ABC. En haandbog for fagfolk and amatører . Copenhagen 1936, p. 314 .
- Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 80 .
Individual evidence
- ↑ Werdermann: Kakteenkunde organ of the Deutsche Kakteen-Gesellschaft EV, Berlin 1934, p. 188
- ↑ Říha: Kaktusy (Brno) . Vol. 11, 1974, p. 75.
- ↑ Taylor: Cactaceae Consensus Initiatives . Volume 3, 1997, p. 10.
- ↑ W. Blum et al., Echinocereus (preprint) . 1998, p. 9.
- ↑ Echinocereus viereckii in the Red List of Threatened Species of the IUCN 2013.2. Listed by: Guadalupe Martínez, J., 2013. Retrieved January 20, 2014.
