Leocereus bahiensis

from Wikipedia, the free encyclopedia
Leocereus bahiensis
Leocereus bahiensis (ssp.urandianus)

Leocereus bahiensis ( ssp.urandianus )

Systematics
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Trichocereeae
Genre : Leocereus
Type : Leocereus bahiensis
Scientific name of the  genus
Leocereus
Britton & Rose
Scientific name of the  species
Leocereus bahiensis
Britton & Rose
Leocereus bahiensis

Leocereus bahiensis is the only plant species of the monotypic genus Leocereus in the cactus family(Cactaceae). The botanical name of the genus honors Antônio Pacheco Leão (1872–1931), a director of the Botanical Garden of Rio de Janeiro . The epithet of the species refers to the place where it was found, the Brazilian state of Bahia .

description

The upright or slightly elongated, little branched Leocereus bahiensis reaches heights of growth of up to 3 meters. Its olive-green, cylindrical, slender shoots are woody, up to 2 meters long and between 1 and 2.5 centimeters in diameter. The 10 to 19 ribs are rounded, blunt and low. The circular areoles are 4 to 7 millimeters apart. The 8 to 16 slender, needle-like thorns are yellowish to dark brown.

The white, tubular flowers are 40 to 57 millimeters long, 20 to 25 millimeters in diameter and open at night. They appear near the top of the head. The green, scaled flower cup has pale thorns up to 4 millimeters long in the axillae. The up to 12 millimeters long flower tube is green and covered with dark hair and bristles.

The red, non-tearing fruits are spherical to elongated and are 23 to 31 millimeters long with a diameter of 19 to 32 millimeters. The glossy black seeds are 1.3 to 1.8 millimeters long.

Distribution, systematics and endangerment

The distribution area of Leocereus bahiensis extends, at altitudes of 550 to 1500 meters, from the north of the Brazilian state of Bahia to Minas Gerais .

Some regional subspecies have been published:

  • Leocereus bahiensis ssp. barreirensis (PJBraun & Esteves) PJBraun & Esteves
  • Leocereus bahiensis ssp. exiguospinus (PJBraun & Esteves) PJBraun & Esteves
  • Leocereus bahiensis ssp. robustispinus (PJBraun & Esteves) PJBraun & Esteves
  • Leocereus bahiensis ssp. urandianus (F.Ritter) PJBraun & Esteves

The second species described from Piaui, Leocereus estevesii P.J. Brown, is still controversial among connoisseurs of the genus, but has recently also been recognized.

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. 349-350 .
  • NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape II . The Carnegie Institution of Washington, Washington 1920, p. 108-110 .

Individual evidence

  1. ↑ Braun, PJ & Pereira, EE (1990) New taxa in Leocereus Britton & Rose (Cactaceae). - Cacti and Other Succulents 41: 204-205.
  2. ↑ Lodé, J. (2015): "TAXONOMY of the CACTACEAE" The new classification of Cacti based on molecular data and explained In two volumes: Vol. I: Acanthocalycium - Lymanbensonia / Vol. II: Maihuenia - Yungasocereus
  3. ↑ Leocereus bahiensis in the IUCN Red List of Threatened Species 2013.2. Posted by: Machado, M., 2010. Retrieved March 23, 2014.

Web links

Commons : Leocereus bahiensis  - album with pictures, videos and audio files