Melocactus zehntneri
| Melocactus zehntneri | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
_Luetzelburg_Rio_Grande_do_Norte,_Brasil.jpg)
Melocactus zehntneri Rio Grande do Norte |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Melocactus zehntneri | ||||||||||||
| ( Britton & Rose ) Luetzelb. |
Melocactus zehntneri is a species of the genus Melocactus in the cactus family(Cactaceae). The specific epithet zehntneri honors the Swiss biologist Leo Zehntner (1864–1961).
description
Melocactus zehntneri grows with different green tinted, often blue , hemispherical to cylindrical, very variable in shape shoots that reach heights of 11 to 48 centimeters with diameters of 9 to 25 centimeters. There are ten to 22 sharp-edged ribs . The yellow, brown or reddish thorns are drowned out gray with the exception of the tip. Some are hooked on seedlings. The up to four upwardly curved central spines, which can also be missing, are 1.5 to 4.5 centimeters long. The 1.9 to 4.5 centimeters long seven to eleven radial spines are slightly to strongly bent back. The lowest of them are the longest. The cephalium , which consists of sparse to plentiful white to creamy white wool and dense, fine, light pink-red bristles , is up to 11 centimeters or more high and has a diameter of 6 to 10 centimeters.
The light to deep pink flowers are up to 2.5 centimeters long and 0.4 to 1.3 centimeters in diameter. They do not protrude from the cephalium. The light to deep lilac pink fruits are 1.2 to 2 centimeters long.
Distribution, systematics and endangerment
Melocactus zehntneri is very widespread in the Brazilian states of Piauí , Ceará , Rio Grande do Norte , Paraíba , Pernambuco , Alagoas and Bahia .
It was first described as Cactus zehntneri in 1922 by Nathaniel Lord Britton and Joseph Nelson Rose . Philipp von Luetzelburg placed the species in the genus Melocactus in 1923 .
Melocactus douradaensis is now listed as a subspecies of Melocactus zehntneri :
Melocactus zehntneri ssp. douradaensis (Hovens & Strecker) PJ Braun & Heimen
Another long-thorn subspecies is
Melocactus zehntneri subsp. arcuatispinus (Buining & Brederoo) PJ Braun & Esteves
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. 431-432 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 265.
- ^ NL Britton , JN Rose : The Cactaceae . Descriptions and Illustrations of Plants of the Cactus Family . tape III . The Carnegie Institution of Washington, Washington 1922, p. 236 ( online ).
- ^ Philipp von Luetzelburg: Estudo Botanico do Nordéste . Volume 3, 1923, p. 111.
- ^ PJ Braun & G. Heimen: A new status of Melocactus douradaensis . In: Cacti and other succulents, Volume 71, Number 4, pp. 108-110. 2020
- ↑ Braun, PJ & Esteves Pereira, E. 2002: Cacti and other succulents in Brazil - Schumannia, Volume 3. ISBN 3-89598-830-8
- ↑ Melocactus zehntneri in the IUCN Red List of Threatened Species 2013.2. Posted by: Machado, M., Taylor, NP, Braun, P. & Zappi, D., 2010. Retrieved January 2, 2014.
further reading
- Juliano Ricardo Fabricante, Leonaldo Alves de Andrade, Fábio José Marques: Caracterização populacional de Melocactus zehntneri (Britton & Rose) Luetzelburg (Cactaceae) ocorrente em um inselbergue da Caatinga paraibana . In: Biotemas . Volume 23, Number 1, 2010, pp. 61-67, DOI: 10.5007 / 2175-7925.2010v23n1p61 .
