Gymnocalycium marianae
| Gymnocalycium marianae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Gymnocalycium marianae | ||||||||||||
| Perea , Ferrari , Las Peñas & R. Kiesling |
Gymnocalycium marianae is a species of plant in the genus Gymnocalycium from the cactus family(Cactaceae).
description
Gymnocalycium marianae grows individually, with dark green, spherical or pressed spherical shoots that reach heights of up to 16 centimeters with a diameter of 11 centimeters. The 13 to 16 pointed ribs are 13 millimeters deep and 11 millimeters wide at their base. The cusps, separated by a transverse furrow, are pointed under the areoles. On the above-ground part of the rung there are 4 to 6, sometimes up to 10, 5 millimeters long and 3 millimeters wide areoles per rib . When young they are covered with white-yellow hair and later gray and less hairy. The rigid, blackish to gray thorns are darkly colored at their base. The five to eleven, straight or curved radial spines are 1.5 centimeters to 2.0 centimeters long and stand in two to five pairs directed sideways and a single one is directed downwards. The single, straight central spine is up to 2.5 centimeters long, but can also be missing. The beet-like root becomes up to 3 centimeters long and reaches a diameter of 2 centimeters. It forms numerous lateral fiber roots.
The bell-shaped flowers appear near the apex of the plant, often several at the same time in a ring. They reach a length of 3.5 to 5 centimeters and a diameter of 3 to 5 centimeters. The outside of the flower tube is dull green and has rounded scales with a white border. The scales are about 5 millimeters long and gradually get longer to 10 millimeters. The outer petals are green with a white border. They gradually get larger and merge into the 1.5 to 2 centimeters long and 0.5 to 0.7 centimeters wide, spatulate and slightly pointed, red, magenta-red, pink to orange colored petals. The flowering time extends over several days and the flower color changes. The inwardly curved stamens are about 15 millimeters long and consist of red stamens and yellow anthers. They are in two groups, the first at the top and the second with a higher number of spirals in the inner part of the flower tube. The cylindrical and red colored pen is up to 15 millimeters long. It bears the 9-lobed and yellow-colored scar on its tip . It is up to 4 millimeters long.
The spherically-clipped seeds are 1.2 to 1.5 millimeters long and large in diameter. The egg-shaped hilum micropylar region is terminal and is hardly sunk. The black and wrinkled seed coat has a protective layer that is peeling off and therefore appears brownish.
Distribution, systematics and endangerment
Gymnocalycium marianae is widespread in the Argentine province of Catamarca and there in the department of Andalgalá at altitudes of 1800 meters on stony slopes in dry valleys.
It was first described in 2009 by Mario Perea, Omar Ferrari, Laura Las Peñas, Roberto Kießling.
In the Red List of Threatened Species of IUCN is the species as " Vulnerable (VU) ", d. H. listed as endangered.
proof
literature
- Mario Perea, Omar Ferrari, Laura Las Peñas, Roberto Kiesling: A new, red flowering Gymnocalycium species from Catamarca In: Cacti and other succulents . Volume 60, Number 2, 2009, pp. 35-42.
Individual evidence
- ↑ Gymnocalycium marianae in the IUCN Red List of Threatened Species 2013.2. Posted by: Perea, M., 2010. Retrieved March 15, 2014.