Mammillaria pottsii
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Mammillaria pottsii |
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| Scheer in Salm-Dyck |
Mammillaria pottsii is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet pottsii honors John Potts, the director of the mint in Chihuahua, who discovered the species.
description
Mammillaria pottsii grows from the base or branching along the shoots. The cylindrical, blue-green shoots are up to 20 centimeters high and 2.5 to 3 centimeters in diameter. The conical-shaped warts have no milky juice . The axillae are somewhat woolly. The stiff, basal thickened mostly 7 central spines are spread out and curved and brown to bluish-black in color. They become 0.4 to 1.2 inches long. The top one is strongly curved or protruding. The 30 to 45 radial spines are interlocking, white, straight and 0.3 to 0.5 inches long.
The flowers that do not open wide are brownish red. They are 1 to 1.5 inches long and also large in diameter. The red fruits contain black to blackish brown seeds .
Distribution, systematics and endangerment
Mammillaria pottsii is common in the US state of Texas and the Mexican states of Chihuahua , Coahuila , Durango , Nuevo León , San Luis Potosí, and Zacatecas .
It was first described in 1850 by Frederick Scheer in Joseph zu Salm-Reifferscheidt-Dycks Cacteae in horto Dyckensi cultae anno 1849 .
The following described species and varieties are synonymous :
Chilita pottsii (Scheer in Salm-Dyck) Orcutt (1926), Krainzia pottsii (Scheer in Salm-Dyck) Doweld (2000), Mammillaria leona (Poselg.) Buxb. (1951, incorrect name ICBN -Article 11.4), Leptocladodida leona (Poselg.) Buxb. (1962), Mammillaria pottsii var. Gigas Repp. (1987) and Mammillaria pottsii var. Multicaulis Repp. (1987).
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 404 .
- Alwin Berger : Cacti - instructions for culture and knowledge of the most important introduced species . Eugen Ulmer, Stuttgart 1929, p. 278 .
- NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape IV . The Carnegie Institution of Washington, Washington 1923, p. 136 ff . ( online ).
- Ulises Guzmán: Catálogo de cactáceas mexicanas . Universidad National Autonoma de México, Mexico City 2007, ISBN 970-9000-20-9 , pp. 151 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 190.
- ↑ Cacteae in horto Dyckensi cultae anno 1849, secundum tribus et genera digestæ additis adnotationibus botanicis characteribusque specierum in enumeratione diagnostica cactearum doct. Pfeifferi non descriptarum . Henry & Cohen, Bonn 1850, p. 104 (online) .
- ↑ Mammillaria pottsii in the IUCN Red List of Threatened Species 2013.2. Posted by: Heil, K., Terry, M., Goettsch, BK & Corral-Díaz, R., 2009. Retrieved December 26, 2013.
