Mammillaria deherdtiana
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Mammillaria deherdtiana subsp. deherdtiana |
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| Scientific name | ||||||||||||
| Mammillaria deherdtiana | ||||||||||||
| Farwig |
Mammillaria deherdtiana is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet honors the Belgian gardener Cyriel De Herdt (* 1931).
description
Mammillaria deherdtiana occurs predominantly individually, with a dark green spherical depression at the top. The warts are predominantly conical and about 10 mm long. About 20 to 36 needle-shaped, white radial spines with a length of 3 to 18 mm (sometimes slightly curved) and zero to six light to dark red-brown, sometimes yellowish central spines with a length of 3 to 20 mm sit on the warts .
The relatively large flowers reach a wide-open funnel 50 mm in diameter. In culture, Mammillaria deherdtiana subsp. deherdtiana observed a white flowering species. In the natural environment, Mammillaria deherdtiana supsp blooms in spring . dodsonii and only in early summer Mammillaria deherdtiana supsp. derherdtiana .
The 3 to 4 mm long fruits are light green and spherical half still in the body of the plant, on which the floral parts remain dry. The seeds are dark brown to black and about 2 mm in diameter.
Distribution, systematics and endangerment
Mammillaria deherdtiana is native to the Mexican state of Oaxaca . It occurs at Mitla at altitudes above 3000 meters. Mammillaria deherdtiana subsp. dodsonii even grows about 80 kilometers to the west at an altitude of 3,100 meters.
The first description was in 1969 by Stanley J. Farwig .
Synonyms are the following described species and varieties: Bartschella deherdtiana (Farwig) Doweld (2000), Mammillaria dodsonii Bravo (1970), Mammillaria deherdtiana var. Dodsonii (Bravo) Glass & RA Foster (1979) and Bartschella deherdtiana subsp. dodsonii (Bravo) Doweld (2000).
The following subspecies are distinguished:
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Mammillaria deherdtiana subsp. deherdtiana Farwig :
contact line ratio of warts 8:13. The nominate form has 33 to 36 radial spines with a length of 0.3 to 0.6 centimeters. -
Mammillaria deherdtiana subsp. dodsonii (Bravo) DR Hunt :
The first description was in 1970 by Helia Bravo Hollis as Mammillaria dodsonii . David Richard Hunt introduced the species in 1997 as a subspecies to Mammillaria deherdtiana .
In the Red List of Threatened Species of IUCN is the species as " Vulnerable (VU) ", d. H. listed as endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 378 .
- Ulises Guzmán, Salvador Arias, Patricia Dávila: Catálogo de cactáceas mexicanas . Universidad Nacional Autónoma de México, Mexico City 2003, ISBN 970-9000-20-9 , pp. 121 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 63.
- ^ Farwig: Cactus & Succulent Journal . Volume 41, 1969, p. 28.
- ↑ Bravo: Cactaceas y Succulentas Mexicanas . Volume 15, 1970, p. 3.
- ↑ David R. Hunt: Mammillaria Postscript . Volume 6, 1997, p. 5.
- ↑ Mammillaria deherdtiana in the IUCN Red List of Threatened Species 2013.2. Posted by: Arias, S., Cházaro, M., Hernández, HM & Gómez-Hinostrosa, C, 2009. Retrieved December 25, 2013.
