Maihueniopsis clavarioides
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Maihueniopsis clavarioides |
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| ( Otto ex Pfeiff. ) EFAnderson |
Maihueniopsis clavarioides is a species of plant in the genus Maihueniopsis from the cactus family(Cactaceae). The specific epithet clavarioides means 'club-like'.
description
Maihueniopsis clavarioides grows geophytically with a large, swollen taproot and a clump of underground shoots . The sparsely branched, dark grayish-brown, not humped sections of shoots grow along the ground or protrude only a little from it. They are 2 to 3 centimeters long, cylindrical to inverted conical, mostly truncated or sunken at the flattened end surface. In nature, the shoot sections are usually annual. The very small areoles are very numerous in the upper part of the shoot sections and are crowded together. Glochids are not trained. The up to ten tiny thorns are arranged in a comb shape and lie on the surface of the shoot. They are 1 millimeter long.
The yellowish green to olive green flowers appear laterally and are up to 4 centimeters long. Your pericarpel is covered with small scales with short hair and bristles in your armpits. The pear-shaped, dark blackish purple, drying fruits do not tear and are 1.5 to 2 centimeters long.
Distribution, systematics and endangerment
Maihueniopsis clavarioides is distributed in the Argentine provinces of San Juan and Mendoza at altitudes from 2000 to 2800 meters on dry slopes and plains with sparse vegetation.
It was first described as Opuntia clavarioides in 1837 by Ludwig Georg Karl Pfeiffer . Edward Frederick Anderson placed the species in the genus Maihueniopsis in 1999 . Nomenclatory synonyms are Cylindropuntia clavarioides (Otto ex Pfeiff.) FMKnuth (1930), Austrocylindropuntia clavarioides (Otto ex Pfeiff.) Backeb. (1942), Puna clavarioides (Otto ex Pfeiff.) R. Kiesling (1982) and Tephrocactus clavarioides (Otto ex Pfeiff.) GDRowley (2006).
In the Red List of Threatened Species of IUCN is the species as " Near Threatened (NT) ", d. H. low risk led. The development of the populations is considered stable.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 362 .
Individual evidence
- ↑ Enumeratio Diagnostica Cactearum hucusque Cognitarum . Berlin 1837, pp. 173-174 (online)
- ^ Edward F. Anderson: Some nomenclatural changes in the Cactaceae, subfamily Opuntioideae . In: Cactus and Succulent Journal . Volume 71, Number 6, Cactus and Succulent Society of America, 1999, p. 325.
- ^ Tephrocactus Study Group . Volume 12, Number 3, 2006, p. 46.
- ↑ Maihueniopsis clavarioides in the IUCN Red List of Threatened Species 2014.3. Posted by: Méndez, E., Trevisson, M., Perea, M., Demaio, P. & Lowry, M., 2013. Retrieved January 17, 2015.
