Acanthocalycium rhodotrichum

Acanthocalycium rhodotrichum is a species of Acanthocalycium found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay [2]

Acanthocalycium rhodotrichum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Acanthocalycium
Species:
A. rhodotrichum
Binomial name
Acanthocalycium rhodotrichum
(K.Schum.) Schlumpb. 2012
Synonyms
List
  • Echinocactus forbesii Lehm. 1843
  • Echinopsis chacoana Schütz 1949
  • Echinopsis chacoana var. spinosior F.Ritter 1965
  • Echinopsis forbesii A.Dietr. 1849
  • Echinopsis klingleriana Cárdenas 1965
  • Echinopsis meyeri Heese 1907
  • Echinopsis minuana Speg. 1905
  • Echinopsis pentlandii var. forbesii (A.Dietr.) Rud.Mey. 1897
  • Echinopsis rhodotricha K.Schum.
  • Echinopsis rhodotricha var. argentinensis Rud.Mey. 1911
  • Echinopsis rhodotricha var. brevispina F.Ritter 1979
  • Echinopsis rhodotricha subsp. chacoana (Schütz) P.J.Braun & Esteves 1995
  • Echinopsis rhodotricha var. chacoana (Schütz) F.Ritter 1979
  • Echinopsis rhodotricha var. robusta Rud.Mey. 1914
  • Echinopsis rhodotricha var. roseiflora K.Schum. 1903
  • Echinopsis rhodotricha var. spinosior (F.Ritter) F.Ritter 1979
  • Echinopsis robinsoniana Werderm. in Repert. 1934
  • Echinopsis spegazzinii K.Schum. ex Speg. 1905
  • Echinopsis valida Monv. 1843
  • Echinopsis valida var. forbesii Rud.Mey. 1895
  • Trichocereus validus (Monv.) Backeb. 1955

Description

Acanthocalycium rhodotrichum usually grows in groups with erect or ascending, cylindrical, dull green shoots that reach heights of 30 to 80 centimeters with a diameter of up to 12 centimeters. There are eight to 18 low ribs that are somewhat wavy. The areoles on it are 1.5 to 2.5 centimeters apart. Yellowish thorns with a brown tip emerge from them. The single central spine, which can also be absent, is bent slightly upwards and is up to 2 centimeters long. The spread and slightly curved four to eight radial spines are up to 2 centimeters long.

The funnel-shaped white flowers open at night. They grow up to 15 centimeters long.[3]

Distribution

Acanthocalycium rhodotrichum is widespread in the Brazilian state of Mato Grosso do Sul, in Paraguay and in northeast Argentina at altitudes of up to 500 meters.[4]

Subspecies

Recognized subspecies:[2]

ImageSubspeciesDescriptionDistribution
Acanthocalycium rhodotrichum subsp. chacoanum (Schütz) Schlumpb.Has twelve to 18 ribs and seven to eight marginal spines. The first description as Echinopsis chacoana by Bohumil Schütz was published in 1949. Boris O. Schlumpberger introduced the species as a subspecies to Acanthocalycium rhodotrichum in 2021.[5]Common in the Chaco vegetation in Paraguay.
Acanthocalycium rhodotrichum subsp. rhodotrichumDistributed deep in the Chaco vegetation in Paraguay and the Argentine provinces of Chaco, Formosa, Corrientes, Entre Ríos, Santiago del Estero and Santa Fe.

Taxonomy

The first description as Echinopsis rhodotricha by Karl Moritz Schumann was published in 1900. Boris O. Schlumpberger placed the species in the genus Acanthocalycium in 2012.

References
  1. "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. 2010-09-20. Retrieved 2023-09-17.
  2. "Acanthocalycium rhodotrichum (K.Schum.) Schlumpb. - Plants of the World Online". Plants of the World Online. Retrieved 2022-11-17.
  3. Anderson, Edward F.; Eggli, Urs; Anderson, Edward F. (2005). Das große Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. p. 241. ISBN 3-8001-4573-1.
  4. "Monatsschrift für Kakteenkunde". J. Neumann. 1900. Retrieved 2023-09-17.
  5. Korotkova, Nadja; Aquino, David; Arias, Salvador; Eggli, Urs; Franck, Alan; Gómez-Hinostrosa, Carlos; Guerrero, Pablo C.; Hernández, Héctor M.; Kohlbecker, Andreas; Köhler, Matias; Luther, Katja; Majure, Lucas C.; Müller, Andreas; Metzing, Detlev; Nyffeler, Reto; Sánchez, Daniel; Schlumpberger, Boris; Berendsohn, Walter G. (2021-08-31). "Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family". Willdenowia. Botanic Garden and Botanical Museum Berlin, Freie Universitaet Berlin. 51 (2). doi:10.3372/wi.51.51208. ISSN 0511-9618.
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