Disocactus ackermannii
Disocactus ackermannii
Disocactus ackermannii is a species of the genus Disocactus in the cactus family ( Cactaceae ). The specific epithet honors the German cactus growers Georg Ackermann, who introduced the type 1824.
Description
Disocactus ackermannii grows overhanging basal branching and grows up to 1 meter long with no extension shoots. The base of the shoots is turning round and 10 to 18 inches long; flattened at the top and 10 to 70 inches long and 5-7 inches wide with partly wavy shaped edges that are dark green to brownish. The scarlet with green throat and curved funnel-shaped flowers are 11 to 14 inches long. The fruits are ovoid, elongated part, green to reddish brown and 4 inches long and 2 to 2.5 inches in diameter.
Distribution, systematics and hazard
Disocactus ackermannii is common in the Mexican states of Oaxaca, Chiapas and Veracruz and is found at altitudes between 1800-2450 meters.
The first description was in 1829 as Epiphyllum ackermannii by Adrian Hardy Haworth. Ralf Bauer presented the Art 2003 to Disocactus.
Synonyms are the following species and varieties described: 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).
We distinguish the following sub-species and forms:
- Disocactus ackermannii subsp. ackermannii: The nominate form has flattened stems with 35 to 75 centimeters in length. The flowers are 10 to 15 centimeters in diameter. The Perianthsegmente are 7 to 10 inches 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 Art 2003 to Disocactus. The flattened shoots have a length of 10 to 50 centimeters. The flowers are 4.5 to 6 centimeters in diameter. The Perianthsegmente 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 Alexander Johnston. Wilhelm Barthlott put the white flowering form 1991 Disocactus. The form is considered as a cultural elite. ( nom inval. ICBN article 43.1)
In the Red List of Threatened Species IUCN, the type is known as " Least Concern ( LC) ," ie, than not led at risk.