Stenocereus martinezii
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| Stenocereus martinezii | ||||||||||||
| ( JGOrtega ) Buxb. |
Stenocereus martinezii is a species of plant in the genus Stenocereus in the cactus family(Cactaceae). The specific epithet martinezii honors Maximiliano Martinez (1888–1964), plant connoisseur and author of the Mexican flora. Spanish common names are "Pitahayo" and "Pitayo".
description
Stenocereus martinezii grows tree-shaped with numerous branched shoots and reaches heights of 5 to 7 meters. A trunk up to 1 meter high with a diameter of up to 25 centimeters is formed. The more or less cylindrical shoots have a diameter of 8 to 20 centimeters. There are ten to twelve ribs on which there are conspicuous dark reddish-brown areoles . The single, greyish to black central spine - rarely up to three central spines are present - is horizontally protruding to a little sideways. It is 2 to 5 inches long. The four to nine, rarely up to eleven, weak radial spines are grayish and 2 to 6 millimeters (rarely up to 12 millimeters) long.
The funnel-shaped, whitish and yellowish tinged flowers open at night and stay open until the next day. They are 5 to 7 inches long and have a diameter of 3.1 to 6.6 inches. The spherical to egg-shaped, green fruits reach a diameter of 3 to 4.5 centimeters. As they ripen, they become increasingly red. The pulp is red.
Distribution, systematics and endangerment
Stenocereus martinezii is distributed in the Mexican state of Sinaloa in deciduous forests at altitudes around 100 meters.
It was first described as Lemaireocereus martinezii in 1930 by Jesús González Ortega . Franz Buxbaum placed the species in the genus Stenocereus in 1961 .
In the Red List of Threatened Species of IUCN is the species as " Endangered (EN) ," d. H. listed as endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 603 .
Individual evidence
- ↑ Walter Haage: Cacti from A to Z . Anaconda Verlag, Cologne 2008, p. 375.
- ↑ Flora Indigena de Sinaloa . 1930, without page numbers.
- ↑ Botanical Studies . Volume 12, Jena 1961, p. 100.
- ↑ Stenocereus martinezii in the IUCN Red List of Threatened Species 2013.2. Posted by: Terrazas, T., Cházaro, M. & Arreola, H., 2009. Retrieved January 26, 2014.