Maihueniopsis darwinii
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Maihueniopsis darwinii |
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| Maihueniopsis darwinii | ||||||||||||
| ( Hensl. ) F. Knight |
Maihueniopsis darwinii is a species of plant in the genus Maihueniopsis from the cactus family(Cactaceae). The epithet of the species honors its discoverer Charles Darwin .
description
The cushion-forming Maihueniopsis darwinii grows low lying at heights of up to 4 centimeters. Their slightly warty limbs are spherical to egg-shaped and are up to 4 centimeters long. The 18 to 20 large felty areoles are evenly distributed. 10 to 12 spines arise from the upper areoles . 4 to 6 of them are straight, upright or spread out, sometimes a little flattened, yellow to reddish yellow and are up to 4 centimeters long.
The flowers are up to 2 inches long. The flower cup is covered with areoles, the upper thorns of which are up to 4 centimeters long. The yellow petals are broad, trimmed at the top and usually end in a small point. The 2 centimeter long ovary has large woolly areoles. The stylus is thick, the stigma 9-rayed.
The yellow to yellow-orange, cylindrically-clipped fruits are up to 4 centimeters long and reach a diameter of 2.5 centimeters. They have glochids and thorns at the top .
Distribution, systematics and endangerment
Maihueniopsis darwinii is widespread in southern Argentina and grows on stony plains up to altitudes of 2000 meters.
Charles Darwin found the style first at Puerto Deseado and later at Puerto San Julián in 1834 . The first description as Opuntia darwinii was in 1837 by John Stevens Henslow . Alberto Vojtěch Frič assigned the species to the genus Tephrocactus in 1934 before it was placed in the genus Maihueniopsis by Friedrich Ritter in 1980 .
There are numerous synonyms .
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered. 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. 363 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape I . Gustav Fischer Verlag, Stuttgart New York 1982, ISBN 3-437-30380-5 , p. 267 ff .
Individual evidence
- ^ John Stevens Henslow: Description of Two New Species of Opuntia; with Remarks on the Structure of the Fruit of Rhipsalis. In: Magazine of Zoology and Botany . Volume 1, p. 466. 1837 online
- ^ Möller's German Gardener Newspaper . Volume 49, p. 105, Erfurt 1934
- ↑ Friedrich Ritter: Cacti in South America: Results of my 20 years of field research . Volume 2, p. 389, 1980
- ↑ Maihueniopsis darwinii in the IUCN Red List of Threatened Species 2014.3. Posted by: Demaio, P., Kiesling, R., Lowry, M., Méndez, E., Saldivia, P., Faundez, L. & Walter, HE, 2013. Retrieved January 17, 2015.
