Cereus mortensenii
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| ( Croizat ) DRHunt & NPTaylor |
Cereus mortensenii is a species of plant in the genus Cereus from the cactus family(Cactaceae).
description
Cereus mortensenii grows tree-shaped, is richly branched and reaches heights of growth of up to 8 meters. Often a clear trunk is formed. The cylindrical, initially bluish shoots later turn blue-green. They have a diameter of up to 8 centimeters. There are nine sharp ribs . The areoles on them are mostly covered with wool, and hairs are formed near the shoot tips . The one or two strong central spines are yellowish to gray and reach a length of 3 to 4 centimeters. The five to seven thin, pointed radial spines are brownish to gray and 1 to 1.5 centimeters long. In the upper part of the shoot a clearly pronounced pseudocephalium is formed.
The creamy white flowers are up to 6 centimeters long and up to 3.5 centimeters in diameter. A persistent remnant of flowers adheres to the depressed spherical fruits .
Distribution, systematics and endangerment
Cereus mortensenii is common in the Venezuelan state of Lara . The first description as Pilocereus mortensenii was published in 1960 by Léon Camille Marius Croizat . David Richard Hunt and Nigel Paul Taylor placed them in the genus Cereus in 1991 .
In the Red List of Threatened Species of IUCN is the species as " Near Threatened (NT) ", d. H. listed as low risk.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 109 .
Individual evidence
- ^ Novedades Cientificas, Contribuciones Occasionales del Museo de Historia Natural La Salle. Botanica series . Number 1, Caracas 1960, p. 3.
- ↑ Bradleya . Volume 9, 1991, p. 85.
- ↑ Cereus mortensenii in the IUCN Red List of Threatened Species 2013.2. Posted by: Nassar, J., 2011. Retrieved January 1, 2014.