Opuntia microdasys
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| ( Clay. ) Whistle. |
Opuntia microdasys is a species of plant in the genus Opuntia ( Opuntia ) from the cactus family(Cactaceae). The specific epithet microdasys is derived from the Greek adjective "μικρός" (micros) for small and "δασύς" (dasys) for thickly haired . Spanish common names are "Cegador", "Nopal cegador" and "Nopalillo Cegador".
description
Opuntia microdasys is shrubby and has many branches. It forms low cushions with a height of up to 1 meter. The elongated to round, pale green shoot sections are finely haired and 8 to 15 centimeters long. The striking, large, round areoles stand close together. They have numerous golden yellow or brownish glochids . Thorns are usually absent, but very rarely.
The yellow flowers have a reddish hue and reach up to 4 centimeters in diameter. The spherical, dark red fruits are covered with many areoles bearing dense glochids.
The number of chromosomes is 2n = 22.
Distribution, systematics and endangerment
Opuntia microdasys is widespread in the Mexican Chihuahua desert . The distribution area extends south to the state of Hidalgo .
It was first described as Cactus microdasys in 1827 by Johann Georg Christian Lehmann (1792–1860). Ludwig Georg Karl Pfeiffer placed them in the genus Opuntia in 1837 . A synonym is Opuntia macrocalyx .
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
- Opuntia microdasys . In: Edward F. Anderson : The Cactus Family . Timber Press: Portland (Oregon), 2001, p. 508, ISBN 0-88192-498-9
- Opuntia microdasys (Lehmann) Pfeiffer In: NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . Washington, 1919, Vol. I, pp. 120-122
- Opuntia microdasys (Clay.) Whistle. In: Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd edition, 1982, Volume I, p. 575, ISBN 3-437-30380-5
Individual evidence
- ^ Opuntia microdasys at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Index Seminum Hortus Hamburg . 1827, p. 16.
- ↑ Enumeratio Diagnostica Cactearum hucusque Cognitarum . 1837, p. 154.
- ^ Opuntia microdasys in the IUCN Red List of Threatened Species 2014.3. Posted by: Bárcenas Luna, R., Goettsch, BK, Gómez-Hinostrosa, C., Guadalupe Martínez, J. & Sánchez, E., 2013. Accessed January 9, 2015.
