Mammillaria grusonii
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Mammillaria grusonii is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet honors the inventor, scientist, industrial entrepreneur and cactus collector Hermann Gruson from Magdeburg.
description
Mammillaria grusonii usually grows individually. The spherical to thick cylindrical light green shoots are up to 25 centimeters in diameter. The warts are square and contain milk juice . The axillae are woolly at first later naked. The thorns are straight, reddish, turning white with age. The mostly 2 central spines , one ascending and one descending, are 0.4 to 0.6 centimeters long. The 12 to 14 radial spines are 0.6 to 0.8 inches long.
The light yellow, bell-shaped flowers are up to 2.5 centimeters long and have the same diameter. The fruits are scarlet. They contain brown seeds .
Distribution, systematics and endangerment
Mammillaria grusonii is common in the Mexican states of Coahuila and Durango .
The first description was in 1889 by C. Runge. Synonyms are Mammillaria zeyeriana F. Haage ex K.Schum. (1898), Mammillaria grusonii var. Zeyeriana ( F. Haage ex K.Schum.) E. Kuhn (1980, nom. Inval. ICBN -Article 33.3), Mammillaria pachycylindica Backeb. (1959), Mammillaria grusonii var. Pachycylindica (Backeb.) E. Kuhn (1980, nom. Inval. ICBN -Article 33.3), Mammillaria tesopacensis var. Papasquiarensis Bravo (1966), Mammillaria papasquiarensis (Bravo) Repp. (1987) and Mammillaria durangicola 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. 383-384 .
- Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 128 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 99.
- ↑ Garden flora . Vol. 38, Erlangen 1889, p. 105.
- ↑ Mammillaria grusonii in the IUCN Red List of Threatened Species 2013.2. Posted by: Fitz Maurice, B, Fitz Maurice, WA, Hernández, HM, Sotomayor, M. & Smith, M., 2009. Retrieved December 27, 2013.
