Mammillaria evermanniana

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Mammillaria evermanniana
Systematics
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Cacteae
Genre : Mammillaria
Type : Mammillaria evermanniana
Scientific name
Mammillaria evermanniana
( Britton & Rose ) Orcutt

Mammillaria evermanniana is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet honors the director of the Museum of the California Academy of Sciences Barton Warren Evermann (1853–1932), who led the scientific expedition to the Gulf of California in 1921.

description

Mammillaria evermanniana usually grows individually. The spherical to short and thick cylindrical shoots are light green. They grow to be 5 to 7 centimeters in diameter. The conically shaped warts are without milky juice . The axilla are densely woolly especially in the young state and staffed with bristles. The 3  central spines sometimes almost protrude. They are white with a dark tip and up to 1 centimeter long. The 12 to 15 radial spines are needle-like white with a dark tip and 0.8 to 1 centimeter long.

The yellowish cream-colored flowers with a greenish tone and sometimes pinkish-brown central stripes are up to 1 centimeter long and large in diameter. The red fruits contain brown seeds .

The species is closely related to Mammillaria johnstonii .

Distribution, systematics and endangerment

Mammillaria evermanniana is widespread in the Mexican state of Baja California Sur on Isla Cerralvo in the Sea of ​​Cortés .

It was first described in 1923 as Neomammillaria evermanniana by Nathaniel Lord Britton and Joseph Nelson Rose . Charles Russell Orcutt introduced the species to Mammillaria in 1926 .

Synonyms are the following described species and varieties:
Neomammillaria evermanniana Britton & Rose (1923), Mammillaria sonorensis var. Evermanniana (Britton & Rose) Kuhn (1980, nom. Inval. ICBN article 33.3) and Mammillaria nolascana Radley (1940, nom. Inval . ICBN -Article 34.1a).

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. 380-381 .
  • Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 124 .

Individual evidence

  1. ↑ a b N. L. Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape VI . The Carnegie Institution of Washington, Washington 1923, p. 97 ( online ).
  2. ↑ J. Lüthy: Taxonomic investigation of the genus Mammillaria , special issue of the working group for Mammillarienfreunde (AfM), Frankenthal 1995
  3. ↑ Cactography . National City and San Diego, CA 1926, p. 7.
  4. ↑ Mammillaria evermanniana in the Red List of Threatened Species of the IUCN 2013.2. Posted by: León de la Luz, JL, Gómez-Hinostrosa, C. & Hernández, HM, 2012. Accessed December 27, 2013.

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