Mammillaria dioica

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Mammillaria dioica
Mammillaria dioica

Mammillaria dioica

Systematics
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Cacteae
Genre : Mammillaria
Type : Mammillaria dioica
Scientific name
Mammillaria dioica
K.Brandegee
Flowers of Mammillaria dioica

Mammillaria dioica is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet means 'dioecious'.

description

Mammillaria dioica grows solitary or sprouting. The blue-green, cylindrical shoots with a rounded apex are up to 33 centimeters high and 3 to 7 centimeters in diameter. The short, cylindrically shaped warts are firm and without milky sap . The wool-covered axillae have 4 to 15 bristles that are as long as the warts. The 1 to 4  central spines (sometimes missing) are brown to brownish black, needle-like, protruding, strong. They are similar to the radial spines, the bottom hooked, the top straight ascending and 0.8 to 1.5 centimeters long. The 11 to 22 radial spines are needle-like, straight, white and 0.5 to 0.7 inches long.

The flowers are funnel-shaped 1 to 3 centimeters long and functionally dioecious ( diocese ), as the name suggests. They are white to yellowish white, sometimes with a red central stripe. The fruits are club-shaped or ovate and scarlet. They contain black seeds .

Distribution, systematics and endangerment

Mammillaria dioica is found in the US state of California and the Mexican states of Sonora , Baja California, and Baja California Süd .

The first description was in 1897 by Mary Katharine Brandegee .

Synonyms are the following species, varieties and forms described:
Neomammillaria dioica (K.Brandegee) Britton & Rose (1923), Ebnerella dioica (K.Brandegee) Buxb. (1951), Chilita dioica (K.Brandegee) Buxb. (1954, nom. Inval. ICBN -Article 33.3), Cochemiea dioica (K.Brandegee) Doweld (2000), Mammillaria fordii Orcutt (1902), Mammillaria incerta Parish ex Jepson (1936), Mammillaria dioica var. Incerta (Parish ex Jepson ) Munz (1957), Mammillaria dioica fa. incerta (Parish ex Jepson) Neutel. (1986), Mammillaria goodridgii var. Rectispina E.Y.Dawson (1952) and Mammillaria rectispina (EYDawson) 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. 379 .
  • 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. 158 ( online ).
  • Ulises Guzmán: Catálogo de cactáceas mexicanas . Universidad National Autonoma de México, Mexico City 2007, ISBN 970-9000-20-9 , pp. 122 .

Individual evidence

  1. ↑ Mary Katharine Brandegee: Notes on cacteae I . In: Erythea . Volume 5, 1897, p. 115, (online) .
  2. ↑ Mammillaria dioica in the IUCN Red List of Threatened Species 2013.2. Posted by: Burquez Montijo, A. & Felger, RS, 2010. Retrieved December 23, 2013.

Web links

Commons : Mammillaria dioica  - collection of images, videos and audio files