Jasminocereus thouarsii
Jasminocereus thouarsii on Santa Cruz
Jasminocereus thouarsii is the only species of the monotypic genus Jasminocereus in the cactus family ( Cactaceae ). The botanical name of the genus was chosen by the Erstbeschreibern because they looked similar to those of the flowers jasmine. The epithet of the species honors the French explorer Aubert Du Petit Thouars.
Description
The tree-like usually, upright, columnar and freely branched Jasminocereus thouarsii reaches stature heights 3-7 meters and has a trunk. Its yellow to brownish yellow, cylindrical knobs are ribbed, 10 to 50 inches long and can reach diameter 3-5 cm. The 16 to 22 ribs are low. The 2 -millimeter-wide areolae are typically 6-9 millimeters apart. The about 40, unequal, rigid to flexible something, radiating spines are yellowish and darker with age. They have a length of 0.5 to 5 centimeters.
The cream- white to olive-green flowers are 5-9 inches long, have a diameter of 2 to 6 centimeters and open at night. Flower cups and flower-tube covered with scales and hair and slim. The greenish to reddish purple fruits are spherical to elongated and are 5-9 inches long with a diameter from 1.5 to 4.3 centimeters. The adhering flowers rest is enduring. The kidney-shaped seeds are black and usually 1 to 2 millimeters long.
Systematics, distribution and hazard
Jasminocereus thouarsii is distributed on eight lying in the Galápagos archipelago islands. The first description of the genus in 1920 by Nathaniel Lord Britton and Joseph Nelson Rose. Your only way in 1899 described as Cereus thouarsii by Frédéric Albert Constantin Weber for the first time and provided by Curt Backeberg in the genus Jasminocereus 1959. The type species of the genus Cereus galapagensis.
There are three varieties:
- Jasminocereus thouarsii var thouarsii
- Jasminocereus thouarsii var delicatus ( EYDawson ) EFAnderson & Walk.
- Jasminocereus thouarsii var sclerocarpus ( K.Schum. ) EFAnderson & Walk.
Jasminocereus thouarsii was in the Red List of Threatened Species IUCN in 2002 as " Vulnerable (VU) ," ie, endangered classified. In 2013, the species as "Least Concern ( LC) ," ie, than not led at risk. Sub- species are not included in the analysis.