Thelocactus hexaedrophorus
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Thelocactus hexaedrophorus |
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| ( Lem. ) Britton & Rose |
Thelocactus hexaedrophorus is a species of the genus Thelocactus in the cactus family(Cactaceae). The specific epithet comes from the Greek and means 'cube carrier'.
description
Thelocactus hexaedrophorus grows solitary, spherical, pressed and has a 3 to 7.5 centimeter high body with a diameter of 8 to 15 centimeters and a bluish, olive-green or gray-green color. The 8 to 13 ribs are completely dissolved in warts. The warts are more or less six-sided 8 to 20 millimeters long and 13 to 26 millimeters in size. The areoles are 4 to 13 millimeters long and 2 to 3.5 centimeters apart. The 4 to 8 radial spines are 5 to 60 millimeters long, pure white, ocher, reddish to brown, straight or curved, needle-shaped to sub-like. The central spine is 2 to 3 inches long, stronger and stands upright.
The flowers are large, 5 to 10 inches long and wide. The flower color varies from white to slightly pink. The fruits are green to magenta in color and 7 to 11 millimeters in size and crack open when dry.
Distribution, systematics and endangerment
Thelocactus hexaedrophorus grows on gentle slopes and limestone in the Mexican states: San Luis Potosí , Zacatecas , Tamaulipas and Nuevo León . It was first described as Echinocactus hexaedrophorus in 1839 by Charles Lemaire . Nathaniel Lord Britton and Joseph Nelson Rose placed them in the genus Thelocactus in 1922 . There are a lot of invalid double descriptions and recombinations and a multitude of synonyms .
The following subspecies are distinguished:
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Thelocactus hexaedrophorus subsp. hexaedrophorus ( Lem. ) Britton & Rose :
Plants with longer warts, short areoles and white flowers from San Luis Potosi, Tamaulipas and Nuevo Leon. -
Thelocactus hexaedrophorus subsp. lloydii ( Britton & Rose ) NPTaylor :
The first description was by Nathaniel Lord Britton and Joseph Nelson Rose as Thelocactus lloydii . By Nigel Paul Taylor , the assignment has occurred as a subspecies Thelocactus hexaedrophorus . The subspecies has flatter warts, long areoles, and pale pink flowers from zacatecas.
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (CR) ". H. listed as not endangered.
proof
literature
- Edward F. Anderson : The Cactus Family . Timber Press, Portland (Oregon) 2001, ISBN 0-88192-498-9 , pp. 660 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape V . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30384-8 , p. 2800 .
- Alwin Berger : Cacti - instructions for culture and knowledge of the most important introduced species . Eugen Ulmer, Stuttgart 1929, p. 253 .
- NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape IV . The Carnegie Institution of Washington, Washington 1923, p. 6 ( online ).
- Karl Schumann : Complete description of the cacti (Monographia cactacearum) . J. Neumann, Neudamm 1899, p. 438 ( online ).
Individual evidence
- ↑ Lemaire, Cact. Gen November Sp. , 27: 1839
- ^ NL Britton, JN Rose: Two new genera of Cactaceae . In: Bulletin of the Torrey Botanical Club . Volume 49, 1922, p. 251 ( online ).
- ↑ Britton, Rose: The Cactaceae . Volume 4, 1923, p. 11
- ^ NP Taylor: CCI . Volume 1, 1998, p. 5.
- ↑ Thelocactus hexaedrophorus in the IUCN Red List of Threatened Species 2013.2. Posted by: Sotomayor, M., Gómez-Hinostrosa, C., Hernández, HM & Smith, M., 2009. Retrieved December 14, 2013.
