Acanthocalycium thionanthum: Difference between revisions
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{{Taxobox | {{Taxobox | ||
| name = Acanthocalycium thionanthum | | name = Acanthocalycium thionanthum | ||
| image = | | image = Acanthocalycium_thionanthum.jpg | ||
| kingdom = [[Plantae]] | | kingdom = [[Plantae]] | ||
| family = [[Cactaceae]] | | family = [[Cactaceae]] | ||
| subfamily = [[Cactoideae]] | | subfamily = [[Cactoideae]] | ||
| tribe = [[Trichocereeae]] | | tribe = [[Trichocereeae]] | ||
| subtribe = [[Trichocereinae]] | |||
| genus = [[Acanthocalycium]] | | genus = [[Acanthocalycium]] | ||
| species = '''Acanthocalycium thionanthum'' | | species = '''A. thionanthum''' | ||
| binomial = ''Acanthocalycium thionanthum'' | |||
| binomial_authority = (Speg.) Backeb. | |||
| notes = Taxonomy follows Joël Lodé (2015–2019). | | notes = Taxonomy follows Joël Lodé (2015–2019). | ||
}} | }} | ||
''Acanthocalycium thionanthum'' is a species of cactus in the genus [[Acanthocalycium]]. | |||
== Etymology == | |||
The name ''thionanthum'' derives from Greek, referring to sulfur-yellow flowers ("thion" = sulfur, "anthos" = flower). | |||
== Description == | == Description == | ||
''Acanthocalycium thionanthum'' is a small to medium-sized cactus, usually solitary, with globose to short cylindrical stems. The epidermis is green to dark green, often slightly glossy. | |||
Ribs are well defined, with rounded to slightly acute edges. Areoles are spaced regularly and bear numerous radial spines and several central spines. Spines are straight, acicular, varying in color from whitish to brownish. | |||
Flowers are | Flowers are diurnal, funnel-shaped, typically yellow to pale yellow, occasionally with a slight greenish hue. They arise near the apex and have a spiny floral tube. | ||
Fruits are spherical, dry, and dehiscent, with persistent scales. Seeds are small, dark, and papillose. | |||
== | == Habitat == | ||
The species grows in arid to semi-arid environments, often on rocky slopes or among grasses and low shrubs. It tolerates strong sunlight but can also be found in lightly shaded conditions. | |||
== Distribution == | |||
* Argentina – Catamarca, La Rioja, Salta, Tucumán | |||
== | |||
* | |||
== Synonyms == | == Synonyms == | ||
{{columns-list|1| | |||
* ''Echinopsis thionantha'' (Speg.) | |||
* '' | * ''Lobivia thionantha'' (Speg.) | ||
* ''Acanthocalycium brevispinum'' | |||
* '' | * ''Echinopsis brevispina'' | ||
}} | |||
* '' | |||
* '' | |||
== Notes == | == Notes == | ||
* | * Originally described as ''Echinopsis thionantha'' by Spegazzini. | ||
* | * Later transferred to ''Acanthocalycium'' by Backeberg. | ||
* | * The species shows variability in spine density and flower coloration. | ||
* Sometimes included within ''Echinopsis'' in broader classifications. | |||
* | |||
[[Category:Cactaceae]] | [[Category:Cactaceae]] | ||
[[Category:Trichocereeae]] | [[Category:Trichocereeae]] | ||
{{Acanthocalycium species}} | |||
Revision as of 22:58, 11 April 2026
| Acanthocalycium thionanthum | |
|---|---|
| |
| Kingdom | Plantae |
| Family | Cactaceae |
| Subfamily | Cactoideae |
| Tribe | Trichocereeae |
| SubTribe | Trichocereinae |
| Genus | Acanthocalycium |
| Species | A. thionanthum |
| Notes | Taxonomy follows Joël Lodé (2015–2019). |
Acanthocalycium thionanthum is a species of cactus in the genus Acanthocalycium.
Etymology
The name thionanthum derives from Greek, referring to sulfur-yellow flowers ("thion" = sulfur, "anthos" = flower).
Description
Acanthocalycium thionanthum is a small to medium-sized cactus, usually solitary, with globose to short cylindrical stems. The epidermis is green to dark green, often slightly glossy.
Ribs are well defined, with rounded to slightly acute edges. Areoles are spaced regularly and bear numerous radial spines and several central spines. Spines are straight, acicular, varying in color from whitish to brownish.
Flowers are diurnal, funnel-shaped, typically yellow to pale yellow, occasionally with a slight greenish hue. They arise near the apex and have a spiny floral tube.
Fruits are spherical, dry, and dehiscent, with persistent scales. Seeds are small, dark, and papillose.
Habitat
The species grows in arid to semi-arid environments, often on rocky slopes or among grasses and low shrubs. It tolerates strong sunlight but can also be found in lightly shaded conditions.
Distribution
- Argentina – Catamarca, La Rioja, Salta, Tucumán
Synonyms
Notes
- Originally described as Echinopsis thionantha by Spegazzini.
- Later transferred to Acanthocalycium by Backeberg.
- The species shows variability in spine density and flower coloration.
- Sometimes included within Echinopsis in broader classifications.
