Acanthocalycium thionanthum explained

Acanthocalycium thionanthum is a species of Acanthocalycium from Argentina.[1]

Description

Acanthocalycium thionanthum usually grows individually with spherical to short cylindrical, dark green to green-grey shoots and reaches a height of up to with a diameter of . There are 9 to 15 round ribs that are slightly notched and bumpy. From the elliptical areoles arise submissive, gray thorns that have a darker tip. There are 1 to 4 central spines, which can also be absent, and 5 to 10 radial spines.

The somewhat bell-shaped flowers are bright yellow to red or white. They have a length of up to and have the same diameter. Your pericarpel and the flower tube are covered with dark pointed scales and brown to white hair and bristles. The spherical, hard-fleshed fruits tear open and reach a diameter of up to .[2]

Subspecies

Recognized subspecies:[3]

Image Scientific nameDistribution
Argentina
Argentina (Tucumán).
Acanthocalycium thionanthum subsp. thionanthumArgentina

Distribution

Acanthocalycium thionanthum is widespread in the Argentine provinces of Salta, Tucumán and Catamarca at altitudes of 1500 to 3000 meters.

Taxonomy

The first description as Echinocactus thionanthus by Carlos Luis Spegazzini was published in 1905.[4] Curt Backeberg placed the species in the genus Acanthocalycium in 1936.[5] The specific epithet thionanthum is derived from the Greek words theion for 'sulfur' and anthos for 'flower' and refers to the flower color of the species. Further nomenclature synonyms are Lobivia thionantha (Speg.) Britton & Rose (1922), Echinopsis thionantha (Speg.) Werderm. (1931) and Echinopsis thionantha (Speg.) D.R.Hunt (1987).

Notes and References

  1. Web site: Acanthocalycium thionanthum in Tropicos.
  2. Book: Anderson, Edward F. . Eggli . Urs . Anderson . Edward F. . Das große Kakteen-Lexikon . Ulmer . Stuttgart (Hohenheim) . 2005 . 3-8001-4573-1 . de . 68.
  3. Web site: Acanthocalycium thionanthum (Speg.) Backeb. — Plants of the World Online . Plants of the World Online . 2023-09-17.
  4. Web site: Aires. . Museo Nacional de Buenos . Anales del Museo Nacional de Buenos Aires . Impr. de Juan A. Alsina . ser.3:t.4 (1905) . 1905 . 2023-09-17.
  5. Web site: Au Cactus Francophone : . Au Cactus Francophone . fr . 2023-09-17.