Oreocereus ritteri

Oreocereus ritteri is a species of Oreocereus found in Peru.[1]

Oreocereus ritteri
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Oreocereus
Species:
O. ritteri
Binomial name
Oreocereus ritteri
Cullmann 1958

Description

Oreocereus ritteri grows shrubby, is usually branched at the base and forms groups of 2 to 4 meters in diameter and heights of 1 to 1.5 meters. The cylindrical, gray-green shoots are 1 to 2 meters long and have a diameter of 7 to 10 centimeters. There are 12 to 14 ribs that are deeply notched between the areoles. The spiny areoles are densely covered with numerous white hairs. The one or two protruding, bright yellow to orange-yellow central spines are straight to slightly curved downwards and 2 to 10 centimeters long. The up to ten radiating marginal spines are whitish, have a darker tip and are up to 2 centimeters long.

The crooked red flowers are up to 11 centimeters long and have a diameter of 5 centimeters. The spherical fruits are yellowish green and reach a diameter of 3 to 5 centimeters.[2]

Distribution

Oreocereus ritteri is widespread in the Ayacucho region of Peru.

Taxonomy

The first description was made in 1958 by Willy Cullmann.[3] The specific epithet ritteri honors the German cactus specialist Friedrich Ritter.

References
  1. "Oreocereus ritteri Cullmann — Plants of the World Online". Plants of the World Online. Retrieved 2023-09-30.
  2. Anderson, Edward F.; Eggli, Urs; Anderson, Edward F. (2005). Das große Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. p. 484. ISBN 3-8001-4573-1.
  3. "Au Cactus Francophone :". Au Cactus Francophone (in French). Retrieved 2023-09-30.
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