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Gymnocalycium hossei
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Genus:	Gymnocalycium
Species:	G. hossei
Binomial name
Gymnocalycium hossei (Haage) A.Berger 1929
Synonyms
Echinocactus hossei F.Haage 1927

Gymnocalycium hossei is a species of cactus in the genus Gymnocalycium, endemic to Bolivia.

Description

Gymnocalycium hossei typically grows as a solitary cactus, featuring gray-green to bluish-green, flattened spherical shoots that can reach heights of up to 9 centimeters and diameters of 20 centimeters. The cactus has 13 to 19 relatively wide ribs. Its single central spine turns gray as it ages, while the seven to nine radial spines, which are initially brown and bent backward, also turn gray over time and develop darker tips. These spines can grow up to 1.5 centimeters in length, with one pointing downward and the others extending sideways. The flowers of Gymnocalycium hossei range from whitish to reddish-pink, occasionally having a slight brown tint, and feature a short flower tube.

Subspecies

Accepted subspecies:

Distribution and habitat

This species is found in steep grassy slopes in the Argentinian provinces of Catamarca and La Rioja, typically at altitudes between 50 and 1900 meters.

Taxonomy

Gymnocalycium hossei was first described as Echinocactus hossei in 1927 by Friedrich Adolph Haage in the 105th volume of the cactus price list published by F. A. Haage junior in Erfurt. Two years later, Alwin Berger reclassified the species into the genus Gymnocalycium. The specific name "hossei" honors the German botanist Carl Curt Hosseus.

References

1. "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. 2010-09-21. Retrieved 2025-01-05.
2. ^ "Gymnocalycium hossei (F.Haage) A.Berger". Plants of the World Online. 2017-07-01. Retrieved 2025-01-05.
3. Anderson, Edward F.; Eggli, Urs; Anderson, Edward F. (2005). Das große Kakteen-Lexikon (in German). Stuttgart (Hohenheim): Ulmer. p. 317. ISBN 3-8001-4573-1.
4. "Gymnocalycium hossei". LLIFLE. 2013-08-04. Retrieved 2025-01-05.
5. "Haage, F.A. jun.: Kakteen-Preisverzeichnis 1927 : Haage, Friedrich Adolph jun. : Free Download, Borrow, and Streaming : Internet Archive". Internet Archive. 2016-10-23. Retrieved 2025-01-05.

External links

• [REDACTED] Media related to Gymnocalycium hossei at Wikimedia Commons
• [REDACTED] Data related to Gymnocalycium hossei at Wikispecies

• IUCN Red List least concern species
• Gymnocalycium
• Plants described in 1929