Disocactus ackermannii
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Disocactus ackermannii commonly called red orchid cactus is an epiphytic cactus from tropical forests in the states of Veracruz and Oaxaca, Mexico. In cultivation, it has been confused with Disocactus × jenkinsonii, a hybrid between D. phyllanthoides and D. speciosus.[1]
Description
The stems of Disocactus ackermannii consist of a short rounded base, about Template:Convert long, followed by longer flattened leaf-like portions, Template:Convert long and Template:Convert wide with wavy edges. The plant branches from the base and arches downwards, being altogether some Template:Convert long. The scarlet flowers have greenish throats and are funnel shaped, Template:Convert or even longer and up to Template:Convert across. The filaments are red but the base is usually greenish. The anthers are pale rose. The style are red. The stigma is purplish. Fertilized flowers are followed by green to brownish red fruits, Template:Convert long and Template:Convert wide.[2][3]
Range and habitat
Disocactus ackermannii is native to the states of Chiapas, Oaxaca, Puebla, and Veracruz in southern Mexico. It inhabits cloud forests in the Sierra Madre de Oaxaca and Chiapas Highlands between 1,800 and 2,500 meters elevation.[4]
Taxonomy
The species was originally named Epiphyllum ackermannii by Adrian Hardy Haworth in 1829. There are three sets of synonyms:[2]
- Haworth's Epiphyllum ackermannii was successively transferred to Cactus ackermannii (1830), Cereus ackermannii (1837), Phyllocactus ackermannii (1842) and Nopalxochia ackermannii (1935) before the current Disocactus ackermannii (1991).
- Phyllocactus weingartii A.Berger is an independent synonym.
- Nopalxochia conzattianum was named by Thomas Baillie MacDougall in 1947. It was successively transferred to Pseudonopalxochia conzattianum (1959) and Nopalxochia ackermannii var. conzattianum (1981) before the current Disocactus ackermannii var. conzattianum (1991).
Two varieties are currently recognized. D. a. var. ackermannii has longer cladodes (flattened stem portions), Template:Convert long, and longer tepals, Template:Convert long. D. a. var. conzattianum has shorter cladodes, Template:Convert long, shorter hypanthia, Template:Convert long, and shorter tepals, Template:Convert long.[2][3]
Cultivation
In cultivation, Disocactus × jenkinsonii, a hybrid between D. phyllanthoides and D. speciosus, has been confused with D. ackermannii and is often distributed under the name "Phyllocactus ackermannii".Template:Sfn
Disocactus ackermannii has gained the Royal Horticultural Society's Award of Garden Merit.[5][6]
References
External links
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