Mammillaria hutchisoniana
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Mammillaria hutchisoniana |
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| ( HEGates ) Boed. |
Mammillaria hutchisoniana is a species of the genus Mammillaria inthe cactus family (Cactaceae). The epithet of the species honors the American cactus collector Theodore (Ted) Hutchison (1904–1974). The subspecies louisae is named after its mother Louisa Hutchison , who discovered this subspecies.
description
The plants grow individually or with multiple shoots . The individual cylindrical shoots are olive green and reach heights of up to 15 centimeters with diameters of 4 to 6 centimeters. The short, conical warts are olive green and do not contain milky juice . The axillae are bare or barely woolly. The 4 brownish central spines have a purple tip and are 7 to 10 millimeters long. The lowest central spine is hooked. The 10 to 20 upright, slender and needle-like radial spines are initially purple to black and later turn white. Their length is between 5 and 8 millimeters.
The slightly pink to cream-colored or white flowers have a dark central stripe and reach a diameter of 25 to 30 millimeters. The club-shaped, scarlet-red fruits are 20 millimeters long and contain black, dotted seeds less than 1 millimeter in diameter.
Distribution, systematics and endangerment
It becomes the two subspecies
- Mammillaria hutchisoniana subsp. hutchisoniana
- Mammillaria hutchisoniana subsp. louisae
distinguished.
Mammillaria hutchisoniana subsp. hutchisoniana is characterized by a variable number of radial spines and cream-colored flowers, while Mammillaria hutchisoniana subsp. louisae usually has about 11 radial spines and white to pink flowers with a purple-pink central stripe.
Mammillaria hutchisoniana subsp. hutchisoniana is widespread on the Mexican Baja California Peninsula , while Mammillaria hutchisoniana subsp. louisae is restricted to the area on the coast near the island of Socorro .
The first description of Mammillaria hutchisoniana subsp. hutchisoniana as Neomammillaria hutchisoniana was made in 1934 by Howard Elliott Gates . Friedrich Bödeker placed them in the genus Mammillaria in 1936 . Further synonyms exist through recombinations in the genera Chilita and Ebnerella . Mammillaria hutchisoniana subsp. louisae was described for the first time in 1960 by George Edmund Lindsay as Mammillaria louisae and in 1997 was transferred to the rank of a subspecies by David Richard Hunt .
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 . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 388 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape V . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30384-8 , p. 3297 f .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 112.
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 141.
- ^ Cactus and Succulent Journal . Volume 6, No. 4, Los Angeles 1934
- ↑ In: Curt Backeberg, Frederic Marcus Knuth: Kaktus-ABC . P. 387, 1936
- ^ Cactus and Succulent Journal . Volume 32, p. 169. Los Angeles 1960
- ↑ Mammillaria Postscripts . Volume 6, No. 5, 1997
- ↑ Mammillaria hutchisoniana in the IUCN Red List of Threatened Species 2013.2. Posted by: León de la Luz, JL, Gómez-Hinostrosa, C. & Hernández, HM, 2009. Retrieved December 23, 2013.
Web links
- Distribution map , description and photos for the subspecies hutchinsoniana at www.mammillarias.net
- Distribution map , description and photos for the subspecies louisae at www.mammillarias.net