Neobuxbaumia macrocephala
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Neobuxbaumia macrocephala |
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| ( FACWeber ex K.Schum. ) EYDawson |
Neobuxbaumia macrocephala is a species of the genus Neobuxbaumia in the cactus family(Cactaceae).
description
Neobuxbaumia macrocephala usually branches out, but sometimes also grows individually and reaches heights of 7 to 15 meters. The trunk has a diameter of 30 to 60 centimeters. The columnar, cloudy green shoots are up to 12 meters long and have a diameter of 30 to 40 centimeters. The 17 to 26 ribs are low and blunt. One of the one to three, 4 to 5 centimeters long central spines is flattened. The spread out, grayish eight to twelve radial spines are up to 1 centimeter long. The terminal pseudocephalium consists of large areoles that have abundant yellow wool and numerous bristles.
The cylindrical to tubular flowers appear circular from the pseudocephalium near the shoot tips. They are white, 1.2 to 1.6 inches long and 2.1 to 2.8 inches in diameter. Your pericarpel and the flower tube are covered with small bumps and wide scales. The purple-red, spherical fruits are up to 2 centimeters long and covered with scales.
Distribution, systematics and endangerment
Neobuxbaumia macrocephala is distributed in the Mexican state of Puebla in the Tehuacán Valley .
It was first described as Cephalocereus macrocephalus in 1897 by Karl Moritz Schumann . Elmer Yale Dawson placed the species in the genus Neobuxbaumia in 1952 .
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 438-439 .
Individual evidence
- ↑ General description of the cacti . 1897, p. 197.
- ^ Cactus and Succulent Journal . Volume 24, Los Angeles 1952, p. 173.
- ↑ Neobuxbaumia macrocephala in the IUCN Red List of Threatened Species 2013.2. Posted by: Arias, S., Zavala-Hurtado, A. & Valverde, T., 2009. Retrieved January 25, 2014.
further reading
- Héctor Godínez-Alvarez, Alfonso Valiente-Banuet: Demography of the columnar cactus Neobuxbaumia macrocephala: a comparative approach using population projection matrices . In: Vegetatio . Volume 174, number 1, 2004, pp. 109-118, doi : 10.1023 / B: VEGE.0000046052.35390.59 .
- A. Valiente-Banuet, A. Rojas-Martínez, M. Del Coro Arizmendi, P. Dávila: Pollination biology of two columnar Cacti (Neobuxbaumia mezcalaensis and Neobuxbaumia macrocephala) in the Tehuacan Valley, central Mexico . In: American Journal of Botany . Volume 84, Number 4, 1997, pp. 452-455, online .
- Ligia Esparza-Olguín, Teresa Valverde, Elena Vilchis-Anaya: Demographic analysis of a rare columnar cactus (Neobuxbaumia macrocephala) in the Tehuacan Valley, Mexico . In: Biological Conservation . Volume 103, number 3, 2002, pp. 349-359, doi : 10.1016 / S0006-3207 (01) 00146-X .
