Pterocactus fischeri
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Pterocactus fischeri |
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| Britton & Rose |
Pterocactus fischeri is a species of the genus Pterocactus from the cactus family(Cactaceae).
description
Pterocactus fischeri forms several unbranched, cylindrical shoots. They are tuberous, greenish-brown and are up to 15 centimeters long and 1 to 1.5 centimeters in diameter. The numerous, yellowish glochids are 0.3 to 0.4 centimeters long. The four brown or black central spines have a yellowish tip, they are only present on the upper ends of the shoots and are 1 to 5 centimeters long. 12 or more whitish, bristle-like radial spines are formed, which are up to 6 millimeters long.
The copper-colored to brownish, sometimes also purple or copper-yellowish flower reaches a diameter of up to 2.5 centimeters. The heavily tuberous fruits are 2 to 2.5 centimeters in diameter.
Distribution, systematics and endangerment
Pterocactus fischeri is distributed in southern and central Argentina in the provinces of Neuquén , Río Negro and in the southern part of Mendoza at altitudes of 500 to 1000 meters. The species was first described in 1919 by Nathaniel Lord Britton and Joseph Nelson Rose .
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered. The development of the populations is considered stable.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 553 .
Individual evidence
- ↑ The Cactaceae . Volume 1, 1919, pp. 31-32 ( online ).
- ↑ Pterocactus fischeri in the IUCN Red List of Threatened Species 2014.3. Posted by: Kiesling, R., 2013. Retrieved January 16, 2015.
