Mammillaria glassii

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Mammillaria glassii
Mammillaria glassii subsp. glassii

Mammillaria glassii subsp. glassii

Systematics
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Cacteae
Genre : Mammillaria
Type : Mammillaria glassii
Scientific name
Mammillaria glassii
RAFoster

Mammillaria glassii is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet honors the American botanist and longtime editor of the American cactus magazine Charles Edward Glass .

description

Mammillaria glassii forms cushions. The spherical to cylindrical shoots are 3 to 10 centimeters high and 3 to 10 centimeters in diameter. The cylindrically shaped warts are without milky sap . The axillae are covered with 20 to 30 white bristles up to 2.5 centimeters long or they are bare. The 1 to 8  central spines are 0.4 to 0.7 inches long. They are protruding, straight or hooked and often very difficult to distinguish from the radial spines. The 50 to 60 radial spines are hair-like white, interlocking and 1 to 1.5 centimeters long.

The light pink flowers , which often do not open completely, are 1.4 centimeters long and 0.3 to 2.2 centimeters in diameter. The fruits, which turn green to pink, are up to 2 centimeters long. They contain black seeds .

Distribution, systematics and endangerment

Mammillaria glassii is common in the Mexican states of Coahuila , Tamaulipas, and Nuevo León .

It was first described in 1968 by Robert Alan Foster .

Synonyms are the following species and varieties:
Mammillaria glassii var. Nominis-dulcis A.B.Lau (1985), Mammillaria ascensionis var. Nominis-dulcis (ABLau) Repp. (19878), Bartschella glassii subsp. nominis-dulcis (ABLau) Doweld (2000), Mammillaria glassii subsp. nominis-dulcis (ABLau) U.Guzmán (2003), Bartschella glasii (RAFoster) Doweld (2000), Mammillaria glassii var. siberiensis A.B.Lau (1985), Bartschella glassii subsp. siberiensis (ABLau) Doweld (2000) and Mammillaria glassii subsp. siberiensis (ABLau) U.Guzmán (2003).

The following subspecies are distinguished:

  • Mammillaria glassii subsp. ascensionis (Repp.) DRHunt :
    It was first described in 1979 as Mammillaria ascensionis by Werner Reppenhagen . David Richard Hunt introduced the species in 1979 as a subspecies to Mammillaria glassii . The subspecies has much stronger shoots, up to 10 centimeters in diameter. The flowers reach a diameter of 1.8 to 2 centimeters. The following subspecies and varieties are synonyms: Mammillaria ascensonis Repp. (1979), Mammillaria glassii var. Ascensionis (Repp.) Glass & RAFoster (1979) and Bartschella glassii subsp. ascensionis (Rep.) Doweld (2000).
  • Mammillaria glassii subsp. glassii :
    The nominate form rarely has a body larger than 3 centimeters in diameter. The flowers are up to 0.35 centimeters in diameter.

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. 382-383 .
  • Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 126 .

Individual evidence

  1. ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 94.
  2. ^ Cactus and Succulent Journal . (Los Angeles), Vol. 40, 1968, p. 132.
  3. ↑ Mammillaria ascensionis spec. nov. In: Kakteen und other Sukkulenten , vol. 30, 1979, issue 3, pp. 61-62.
  4. ↑ DR Hunt: Mammillaria Postscripts . Volume 6, 1997, p. 6.
  5. ^ Mammillaria glassii in the IUCN Red List of Threatened Species 2013.2. Listed by: Fitz Maurice, B, Fitz Maurice, WA, Hernández, HM, Sotomayor, M. & Smith, M., 2009. Retrieved December 26, 2013.

Web links

Commons : Mammillaria glassii  - Collection of images, videos and audio files