| Gymnocalycium robustum | |
|---|---|
| |
| Conservation status | |
 Least Concern (IUCN 3.1) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Genus: | Gymnocalycium |
| Species: | G. robustum |
| Binomial name | |
| Gymnocalycium robustum R. Kiesling, O. Ferrari & Metzing 2002 | |
Gymnocalycium robustum is a species of Gymnocalycium from northern Córdoba and southern Santiago del Estero, Argentina.
Description
Gymnocalycium robustum grows as a solitary cactus with gray, gray-green, or slightly mauve-colored, flattened spherical stems. It reaches 8 to 11 cm in diameter and 3 to 5 cm in height. The plant has 9 to 11 broad, flat, blunt ribs that are distinctly cross-grooved and divided into low, chin-like protrusions. It lacks a central spine. There are 5 to 7 stiff radial spines up to 1.5 cm long, one pointing downward and the others sideways. When dry, the spines are chalk-white; when moist, they are yellowish with brown tips and bases. The broad, funnel-shaped flowers are white with a pink throat, measuring up to 6 cm long (occasionally up to 7 cm) and 6 cm in diameter. The fruits are club-shaped or rarely spindle-shaped, gray in color, 4 to 4.5 cm long, and 1.5 to 1.8 cm in diameter.
Distribution
Gymnocalycium robustum is native to southern Santiago del Estero and Córdoba Province of Argentina, growing on granite rocks at elevations of 300 to 600 meters.
Taxonomy
It was first described in 2002 by Roberto Kiesling, Omar Ferrari, and Detlev Metzing.
References
- "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. 2010-09-21. Retrieved 2023-12-08.
- "Gymnocalycium robustum in Tropicos".
- Anderson, Edward F.; Eggli, Urs; Anderson, Edward F. (2005). Das große Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. p. 326. ISBN 3-8001-4573-1.
- Vallicelli, Valentino (2013-08-04). "Gymnocalycium robustum". LLIFLE. Retrieved 2024-12-09.
This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.
- "Gymnocalycium robustum R.Kiesling, O.Ferrari & Metzing". Plants of the World Online. Retrieved 2024-12-09.
External links
Media related to Gymnocalycium robustum at Wikimedia Commons
Data related to Gymnocalycium robustum at Wikispecies
