Disocactus ackermannii
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Disocactus ackermannii |
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| ( Haw. ) Ralf Bauer |
Disocactus ackermannii is a species of the genus Disocactus in the cactus family(Cactaceae). The specific epithet honors the German cactus breeder Georg Ackermann , who introduced the species in 1824.
description
Disocactus ackermannii grows overhanging at the base and is up to 1 meter long without extension shoots. The base of the shoots is round and 10 to 18 centimeters long; flattened in the upper part and 10 to 70 centimeters long and 5 to 7 centimeters wide with partly wavy edges that are dark green to brownish. The scarlet, funnel-shaped flowers with a green throat are 11 to 14 centimeters long. The fruits are egg-shaped, partly elongated, green to reddish brown and 4 centimeters long and 2 to 2.5 centimeters in diameter.
Distribution, systematics and endangerment
Disocactus ackermannii is widespread in the Mexican states of Oaxaca , Chiapas and Veracruz and occurs at altitudes between 1800 and 2450 meters.
It was first described as Epiphyllum ackermannii in 1829 by Adrian Hardy Haworth . Ralf Bauer presented the species to Disocactus in 2003 .
The following species and varieties are synonyms : Epiphyllum ackermannii Haw. (1829), Cactus ackermannii (Haw.) Lindl. (1830), Cereus ackermannii (Haw.) Otto (1837), Phyllocactus ackermannii (Haw.) Salm-Dyck (1841), Nopalxochia ackermannii (Haw.) FMKnuth (1936), Epiphyllum ackermannii fa. candidum Alexander (1947), Nopalxochia ackermannii fa. candida (Alexander) Kimnach (1981), Phyllocactus weingartii A. Berger (1920), Nopalxochia conzattiana T. MacDoug . (1947), Pseudonopalxochia conzattiana (T. MacDougall) Backeb. (1959) (nom inval. ICBN - Article 43.1), Nopalxochia ackermannii var. Conzattiana ( T. MacDoug .) Kimnach (1981), Disocactus ackermannii var. Conzattiana (T. MacDoug.) Barthlott (1991) (nom inval. ICBN - Article 43.1) and Heliocereus conzattianus (T.MacDoug.) Doweld (2002).
The following subspecies and forms are distinguished:
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Disocactus ackermannii subsp. ackermannii :
The nominate form has flattened shoots 35 to 75 centimeters long. The flowers are 10 to 15 centimeters in diameter. The perianth segments are 7 to 10 centimeters long. -
Disocactus ackermannii subsp. conzattianus (T.MacDoug.) Ralf Bauer :
The first description as Nopalxochia conzattianum was made in 1947 by T. MacDougall. Ralf Bauer presented the species to Disocactus in 2003 . The flattened shoots are 10 to 50 centimeters long. The flowers are 4.5 to 6 inches in diameter. The perianth segments are 4 to 6 inches long. -
Disocactus ackermannii f. candidus (Alexander) Barthlott :
The first description as Epiphyllum ackermannii f. candidum was made in 1947 by Edward Johnston Alexander . Wilhelm Barthlott presented the white-flowering form to Disocactus in 1991 . The shape is seen as cultural selection. (nom. invalid ICBN -Article 43.1)
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 . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 183 .
- Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 57 .
Individual evidence
- ↑ Alwin Berger : Cacti - instructions for culture and knowledge of the most important introduced species . Eugen Ulmer, Stuttgart 1929, p. 101 .
- ↑ Karl Schumann : Complete description of the cacti (Monographia cactacearum) . J. Neumann, Neudamm 1899, p. 216 ( online ).
- ^ Philosophical Magazine, or Annals of Chemistry, Mathematics, Astronomy, Natural History and General Science. London : 109. (1829)
- ^ Cactaceae Systematics Initiatives: Bulletin of the International Cactaceae Systematics Group. England , 17:16 (2003)
- ↑ Cactus and Succulent Journal (Los Angeles) 19 (2): 22-23, f. 15-16 22 (1947)
- ^ Cactaceae Systematics Initiatives: Bulletin of the International Cactaceae Systematics Group. England , 17:17 (2003)
- ↑ Cactus and Succulent Journal (Los Angeles) 19:58 (1947)
- ↑ Bradleya . Volume 9, p. 87 (1991)
- ^ Edward F. Anderson : The great cactus lexicon . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 183 .
- ↑ Disocactus ackermannii in the IUCN Red List of Threatened Species 2013.2. Posted by: Arias, S. & Ishiki, M., 2009. Retrieved January 5, 2014.
