Mammillaria theresae
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Mammillaria theresae |
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| Cutak |
Mammillaria theresae is a species of plant in the genus Mammillaria in the cactus family(Cactaceae). The epithet of the species honors the American Therese Bock, the wife of the cactus collector John Bock from Sharon , the discoverer of the species.
description
Mammillaria theresae usually grows solitary and rarely branched. The spherical to cylindrical, olive-green shoots reach a height of 4 centimeters and a diameter of 1 to 3 centimeters and turn into a strong taproot. The axillae , which are not very woolly, are located between the cylindrical warts . A central spine is not formed. The translucent white to yellowish white, about 22 to 30 radial spines are feathery and up to 2 millimeters long.
The funnel-like and purple-purple flowers have a length of 3.5 to 4.5 centimeters and a diameter of 3 centimeters. The club-shaped fruits are embedded in the plant body and are up to 10 millimeters long. They contain black seeds .
Distribution, systematics and endangerment
Mammillaria theresae is common in northwest Mexico in the state of Durango . The plants were first discovered in 1966 by the American Therese Bock on a vacation trip below the Coneto Pass at an altitude of 2100 to 2500 meters.
The first description was in 1967 by Ladislaus Cutak .
The following species and varieties described are synonyms :
Mammillaria saboae var. Theresae (Cutak) GDRowley (1979) and Cochemiea theresae (Cutak) Doweld (2000).
In culture there is a pure white flowering form of the species, which is often referred to as a variety.
In the Red List of Threatened Species of IUCN is the species as " Critically Endangered (CR) ", d. H. listed as critically endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 412 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 239.
- ↑ To the cover picture In: Cacti and other succulents . Volume 33, No. 1, 1982, front cover.
- ^ Cactus and Succulent Journal . Volume 39, 1967, pp. 237-241.
- ↑ CACTUS ART NURSERY
- ↑ Mammillaria theresae in the IUCN Red List of Endangered Species 2013.2. Posted by: Fitz Maurice, B, Fitz Maurice, WA, Hernández, HM & Sotomayor, M., 2009. Retrieved December 25, 2013.
