Rauhocereus riosaniensis
| Rauhocereus riosaniensis | ||||||||||||
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Rauhocereus riosaniensis |
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| Scientific name of the genus | ||||||||||||
| Rauhocereus | ||||||||||||
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| Rauhocereus riosaniensis | ||||||||||||
| Backeb. |
Rauhocereus riosaniensis is the only plant species of the monotypic genus Rauhocereus in the cactus family(Cactaceae). The botanical name of the genus honors the German botanist and cactus specialist Werner Rauh . The epithet of the species refers to the place where the species was found, the valley of the Río Saña .
description
The mostly shrubby Rauhocereus riosaniensis , usually branching from the bottom , often forms thickets up to 4 meters high. The upright, columnar shoots are bluish-green and 8 to 15 centimeters in diameter. The 5 to 6 ribs are broken up into many warts. From the woolly areoles arise 2 to 8 strong, up to 5 centimeters long thorns . The lower ones are initially reddish, the upper ones yellowish. Later they all turn grayish-white.
The bell-shaped flowers appear near the tip of the shoot. They open at night, are eight to ten centimeters long and up to five centimeters in diameter. The flower cup and the flower tube are covered with small scales and curly brown hair.
The red, fleshy fruits are egg-shaped with a persistent flower remnant. They contain small, egg-shaped, glossy black seeds .
Distribution, systematics and endangerment
Rauhocereus riosaniensis is widespread in northern Peru in the Amazonas and Cajamarca regions at altitudes of 500 to 1000 meters.
The first description of the species and its single species was carried out in 1957 by Curt cheek mountain . The genus is closely related to Browningia .
There are two subspecies :
- Rauhocereus riosaniensis subsp. riosaniensis
- Rauhocereus riosaniensis subsp. jaenensis
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.
proof
Individual evidence
- ↑ Curt cheek mountain: Descriptiones Cactearum Novarum . Jena 1956, p. 5.
- ↑ Rauhocereus riosaniensis in the Red List of Threatened Species of the IUCN 2013.2. Posted by: Ostalaza, C. & Cáceres, F., 2013. Retrieved April 20, 2014.
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 558 .
