Pygmaeocereus bylesianus
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Pygmaeocereus bylesianus |
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| Andreae & Backeb. |
Pygmaeocereus bylesianus is a species of plant in the genus Pygmaeocereus from the cactus family(Cactaceae). The epithet of the species honors the British cactus collector Ronald S. Byles .
description
Pygmaeocereus bylesianus grows with spherical to short cylindrical dark green shoots up to 8 centimeters long and 2 centimeters in diameter. The shoots branch out at the base and form small pads. There is a fleshy tap root . The 12 to 14 ribs are initially notched and later divided into clear cusps . The 10 to 15 radiating dark thorns turn gray with age. They are 3 to 7 millimeters long and usually not distinguishable into central and radial spines. Occasionally 1 to 2 to 2 centimeters long central spines are formed.
The broad, funnel-shaped, white flowers are 6 inches long. They have a very slim and long flower tube. The spherical fruits are red and about 15 millimeters in size. They are thick-walled and tear open lengthways or dry up.
Distribution, systematics and endangerment
Pygmaeocereus bylesianus is distributed in the Peruvian region of Arequipa at altitudes of 50 to 1000 meters.
The first description was in 1957 by Wilhelm Andreae and Curt Backeberg .
In the Red List of Threatened Species of IUCN is the species as " Critically Endangered (CR) ", d. H. listed as critically endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 556 .
Individual evidence
- ↑ National Cactus and Succulent Journal . Volume 12, 1957, pp. 86-87.
- ↑ Pygmaeocereus bylesianus in the Red List of Threatened Species of the IUCN 2013.2. Posted by: Cáceres, F., 2013. Retrieved April 20, 2014.
