Mammillaria duoformis
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Mammillaria duoformis |
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| RTCraig & EYDawson |
Mammillaria duoformis is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet duoformis means 'two shapes'.
description
Mammillaria duoformis usually grows in groups. The shoots are cylindrical in shape. They grow up to 9 inches high and 3 to 4 inches in diameter. The warts do not contain milky juice . Milky juice, on the other hand, is present in the body. The axillae are covered with bristles. The 4 central spines are pink-ocher at the base, blackish brown above. They are 1 to 1.2 centimeters long, the bottom is straight or hooked and a little longer. The 18 to 20 radial spines are slender, needle-like, straight, chalky-white to light yellow near the tip, and below that they are orange-brown. They are 0.5 to 0.7 inches long.
The bright, scarlet flowers are up to 1.5 inches long and up to 1.2 inches in diameter. The light brownish-pink colored fruits contain brown seeds .
Distribution, systematics and endangerment
Mammillaria duoformis is common in the Mexican states of Morelos , Oaxaca and Puebla .
It was first described in 1948 by Robert T. Craig and Elmer Yale Dawson .
Synonyms are the following species and varieties described:
Mammillaria pseudorekoi var. Duoformis (RTCraig & EYDawson) E.Kuhn (1984, nom inval.. ICBN -Article 33.3), Mammillaria hamata clay. (1832), Mammillaria duoformis var. Rectiformis R.T. Craig & EYDawson (1948), Mammillaria duoformis var. Typica R.T. Craig & EYDawson (1948, nom. Inval. ICBN -Article 24.3), Mammillaria rossiana Heinr. (1958, nom. Inval. ICBN -Article 8.4), Mammillaria heeriana Backeb. (1961, nom. Inval. ICBN article 32.1c), Mammillaria erythrocalix Buchenau (1966), Mammillaria claviformis Repp. (1987) and Mammillaria duoformis var. Xuchiapensis Repp. (1987).
In the Red List of Threatened Species of the IUCN , the species is called " Data Deficient (DD) ", i. H. with insufficient data.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 379 .
- Ulises Guzmán: Catálogo de cactáceas mexicanas . Universidad National Autonoma de México, Mexico City 2007, ISBN 970-9000-20-9 , pp. 123 .
Individual evidence
- ^ Allan Hancock Foundation . Publications. Occasional papers. Los Angeles, No. 2, 1948, p. 59
- ↑ Mammillaria duoformis in the IUCN Red List of Threatened Species 2013.2. Posted by: Arias, S., Valverde, T. & Zavala-Hurtado, A., 2009. Retrieved December 27, 2013.
