Denmoza
Denmoza rhodacantha
Denmoza rhodacantha is the only species of the monotypic genus Denmoza in the cactus family ( Cactaceae ). The botanical name of the genus is an anagram of the name of the Argentine province of Mendoza, the place where the Art
Description
Denmoza rhodacantha grows individually and has spherical to short cylindrical shoots that reach a height of up to 1.5 meters and a diameter of 20 to 30 centimeters. Not less than 30 ribs are high, and wide at the base to 1 centimeter. The areoles are initially separated later confluent and bring brownish red, then gray expectant thorns, which are very different in young and old plants. The central spine, which may be absent, is 2 to 3 inches long. The 8 to 10 pfriemlichen spines are slightly curved. The areoles from which spring the flowers bring forth both a number of long, brown bristles and up to 7 inches long thorns.
The near the shoot tip produced, at the opening day, tubular, disymmetrischen flowers are scarlet. The curved corolla tube usually is slightly widened over occupied with small, tamped shed Perikarpell. The person sitting on red stamens anthers and the style protrude at least 10 mm from the tube. The nectar chamber is closed by a wreath of hair on back formed staminodes.
The spherical trimmed with tufts of hair-like thorns fruits are ripe, dry and tear sideways from above on. They contain shiny black -brown seeds of about 1.3 millimeters in diameter.
Denmoza rhodacantha is pollinated by hummingbirds.
Distribution, systematics and hazard
Denmoza rhodacantha is widespread on the eastern slopes and foothills of the Andes in the provinces of Mendoza to Salta at altitude 800-2800 meters in the northwest and western Argentina.
The first plants were probably discovered in 1821 by John Gilles, near the city of Mendoza. They got the name Cactus coccinea, which was never described valid. The first description of the species as Echinocactus rhodacanthus was made in 1834 by Joseph Salm- Dyck Reifferscheidt. Nathaniel Lord Britton and Joseph Nelson Rose introduced in 1922 for the type of the genus Denmoza.
The International cactus systematics group of the International Organization for Sukkulentenforschung had Denmoza rhodacantha 1986 initially placed in the genus Cleistocactus before they recognized this in 1999 as an independent genus.
By recombinations in the genera Cereus, Cleistocactus, Echinopsis, Oreocereus and Pilocereus numerous synonyms created for the species A synonym for the genus is Demnosa Fric.
In the Red List of Threatened Species IUCN, the type is known as " Least Concern ( LC) ," ie, than not led at risk.