Gymnocalycium robustum
From Wikipedia, the free encyclopedia
| Gymnocalycium robustum | |
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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.[2]
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.[3]
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.[4]
