Mammillaria discolor
| Mammillaria discolor | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mammillaria discolor |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Mammillaria discolor | ||||||||||||
| Haw. |
Mammillaria discolor is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet discolor means 'different colored, colorful'.
description
Mammillaria discolor grows individually with flattened, spherical, blue-green shoots and a sunken apex. It reaches heights of 3 to 4.5 centimeters and a diameter of 6 to 11 centimeters. The egg-shaped to conical warts do not contain any milky juice . Wool is sparse in the axillae or they are completely bare. The 4 to 7 dark brown, strong, straight and needle-like central spines become lighter with age. They are 1 to 1.2 millimeters long. The 10 to 28 needle radial spines are glassy white or slightly yellow and 8 to 9 millimeters long.
The funnel-shaped flowers do not open wide. They are white with a pink central stripe, 2 to 2.7 centimeters long and reach a diameter of 1.2 to 1.6 centimeters. The club-shaped fruits are greenish white with a pink base and contain brown seeds .
Distribution, systematics and endangerment
Mammillaria discolor is common in the Mexican states of Oaxaca , México , Hidalgo , Veracruz, and Puebla .
It was first described in 1812 by Adrian Hardy Haworth .
The following subspecies are distinguished:
-
Mammillaria discolor subsp. discolor :
The nominate form has 20 to 28 radial spines. Synonyms are the following described species: Neomammillaria discolor (Haw.) Britton & Rose (1923), Chilita discolor (Haw.) Orcutt (1926) and Mammillaria aciculata Otto ex Pfeiff. (1837). -
Mammillaria discolor subsp. esperanzaensis (Boed.) DRHunt :
The first description was made in 1933 as Mammillaria esperanzaensis by Friedrich Bödeker David Richard Hunt presented the species in 1997 as a subspecies to Mammillaria discolor . The subspecies has 10 to 20 radial spines and is only found in Esperanza in the Mexican state of Puebla. The following species is known as a synonym: Mammillaria esperanzaensis Boed. (1933).
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. 379 .
Individual evidence
- ^ Adrian Hardy Haworth: Synopsis plantarum succulentarum . London 1812, p. 177, (online) .
- ↑ Fr. Bödeker: Ein Mammillarien -vergleich-Schlüssel , 1933, p. 40
- ↑ DR Hunt: Mammillaria Postscripts , No. 6, 1997, p. 7
- ↑ Mammillaria discolor in the IUCN Red List of Threatened Species 2013.2. Posted by: Hernández, HM, Gómez-Hinostrosa, C. & Cházaro, M., 2009. Retrieved December 26, 2013.
