Gymnocalycium paraguayense
| Gymnocalycium paraguayense | ||||||||||||
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Gymnocalycium paraguayense |
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| Gymnocalycium paraguayense | ||||||||||||
| ( K.Schum. ) Hosseus |
Gymnocalycium paraguayense is a species of plant in the genus Gymnocalycium from the cactus family(Cactaceae). The specific epithet refers to the distribution area in Paraguay .
description
Gymnocalycium paraguayense initially grows individually and later in groups with shiny green, initially flattened, later spherical shoots and reaches a diameter of 5 to 8 (-12) centimeters. The seven to twelve (rarely from 5) ribs are hardly conspicuous bumpy but divided by transverse furrows with a chin under the bump. The three to nine spread, straight to slightly curved, light brownish-yellow, later light graying thorns are up to 3.5 centimeters (rarely up to 6 centimeters) long.
The white dioecious flowers have a slightly purple-pink throat. They reach a length of up to 6 centimeters and have the same diameter. The 1 to 2 cm long pericarpel is green to olive-green and covered with lighter-edged scales that overflow slightly red at the tips. The style and stigma are white, the stamens pink or whitish and the pollen yellowish.
The green pear- to club-shaped fruits become soft as they ripen. The seeds are brown to black, 1 to 1.6 mm in size and oval.
Distribution, systematics and endangerment
Gymnocalycium paraguayense is distributed in Paraguay in the Paraguarí and Cordillera departments , as well as in the Chaco region at 150 to 300 m in partial shade.
It was first described as Echinocactus paraguayensis in 1903 by Karl Moritz Schumann . Carl Curt Hosseus placed the species in the genus Gymnocalycium in 1939 . The 1898 by Friedrich Ferdinand Haage described varieties Echinocactus denudatus var. Andersohnianus , Echinocactus denudatus var. Delaetianum , Echinocactus denudatus var. Heuschkelianus , Echinocactus denudatus var. Meiklejohnianus , Echinocactus denudatus var. Scheidelianus , Echinocactus denudatus var. Wagnerianus and Echinocactus denudatus var. Wieditziana apply as synonyms .
In the Red List of Threatened Species of IUCN is the species as " Vulnerable (VU) ", d. H. listed as endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 323 .
- Detlev Metzing: Gymnocalycium paraguayense (K. Schumann) Hosseus . In: Cacti and other succulents . Volume 62, number 5, 2011, p. XIXf.
Individual evidence
- ↑ Bulletin de l'Herbier Boissier . 2nd episode, Volume 3, 1903, p. 252, (online) .
- ↑ Archivos de la Escuela de Farmacia de la Facultad de Ciencias Medicas de Cordoba . Volume 9, 1939, p. 106.
- ↑ Ferd. Haage jun .: The varieties of Echinocactus denudatus Lk. Et Otto . In: Monthly for cactus science . Volume 8, Number 3, 1898, pp. 36-37 (online) .
- ↑ Gymnocalycium paraguayense in the IUCN Red List of Threatened Species 2013.2. Listed by: Pin, A. & Oakley, L., 2010. Retrieved March 15, 2014.
