Leptocereus

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Leptocereus
Leptocereus assurgens

Leptocereus assurgens

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Pachycereeae
Genre : Leptocereus
Scientific name
Leptocereus
( A. Berger ) Britton & Rose

Leptocereus is a genus of plants inthe cactus family (Cactaceae). The botanical name is derived from the Greek adjective "λεπτός" (leptos) for 'thin' and refers to the thin ribs of the plants.

description

The species of the genus Leptocereus grow tree-like to shrubby, are upright, climbing to stretched out and reach a height of 8 to 10 meters. The usually cylindrical shoots are articulated and do not form aerial roots . The high, thin 3 to 8 ribs sometimes have notched edges. Durable, needle-like, slender thorns arise from the areoles .

The rather small flowers appear individually or in groups below the tip of the shoot or from a terminal cephalium . They are tubular, bell-shaped or tray-shaped and open during the day or at night. Your pericarpel and the tube of flowers are usually covered with scales and thorns. The spherical to elliptical, fleshy fruits are usually thorny and fall off when ripe. They contain numerous black seeds .

Systematics and distribution

Leptocereus is found on the Caribbean islands of Cuba , Hispaniola , Puerto Rico, and Culebra .

Alwin Berger established Leptocereus in 1905 as a subgenus of Cereus ( Cereus subg. Leptocereus ). Nathaniel Lord Britton and Joseph Nelson Rose raised the subgenus in 1909 to the rank of a genus. The type species of the genus is Cereus assurgens .

Alberto E. Areces Mallea carried out an extensive study of the genus in his doctoral thesis in 2003. The genus includes the following species:

A synonym of the genus is Neoabbottia Britton & Rose (1921).

proof

literature

  • Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 354-358 .
  • Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape IV . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30383-X , p. 1958-1964 .
  • 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. 77-82 .

Individual evidence

  1. ^ Alwin Berger: A Systematic Revision of the Genus Cereus . In: Missouri Botanical Garden Annual Report . 1905, p. 79.
  2. ^ Contributions from the United States National Herbarium . Volume 12, 1909, p. 433, (online) .
  3. ↑ Alberto E. Areces-Mallea: Leptocereus (A. Berger) Britton and Rose: A monographic study of a West Indian genus of Cactaceae (Cactoideae): inferences from morphological and molecular data . 2003
  4. ^ Edward F. Anderson : The great cactus lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 355-358 .

Web links

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