Praecereus

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Praecereus
Praecereus euchlorus

Praecereus euchlorus

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Cereeae
Genre : Praecereus
Scientific name
Praecereus
Buxb.

Praecereus is a genus of plants from the cactus family(Cactaceae). The botanical name of the genus is derived from the Latin syllable "prae" for before and means before of the genus Cereus in the sense of a phylogenetic precursor.

description

The bushy to tree-like growing species of the genus Praecereus are sometimes stretched out, are mostly free branched and reach a height of up to 6 meters. The slender, columnar to pendulous shoots have 7 or more ribs with protruding, round and gray areoles from which needle-like or awl thorns arise.

The robust funnel- to bell-shaped flowers are white to yellowish green and open during the day. Its strong flower cup and the flower tube are thick-walled, fleshy and often curved.

The fleshy, short egg-shaped, lengthways tearing fruits are red with a persistent flower remnant and contain a white pulp. The black, humped seeds are elongated ovoid and somewhat compressed at the sides.

Systematics and distribution

The genus Praecereus is distributed in the south and west of Brazil , in Paraguay , Trinidad , Venezuela , Colombia , Ecuador , Peru , Bolivia and in northeast Argentina .

The first description of the genus was made in 1968 by Franz Buxbaum . The type species of the genus is Cephalocereus smithianus . The genus includes the two species:

  • Praecereus euchlorus (FACWeber) NPTaylor
    • Praecereus euchlorus subsp. euchlorus
    • Praecereus euchlorus subsp. amazonicus
    • Praecereus euchlorus subsp. diffuse
    • Praecereus euchlorus subsp. jaenensis
    • Praecereus euchlorus subsp. smithianus
  • Praecereus saxicola (Morong) NPTaylor

proof

literature

Individual evidence

  1. ^ Franz Buxbaum: The lines of development of the tribe Cereeae Britt. et rose emend. F. Buxbaum (Cactaceae-Cactoideae) I. The "Brazilian Pilocereen" . In: Contributions to the biology of plants . Volume 44, No. 2, Breslau 1968, p. 273.
  2. ^ Edward F. Anderson : The great cactus lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 548-549 .

Web links

Commons : Praecereus  - collection of images, videos and audio files