https://wiki.mjcactus.com/api.php?action=feedcontributions&feedformat=atom&user=162.158.210.116M&J Cactus Wiki - User contributions [en]2026-06-23T10:33:30ZUser contributionsMediaWiki 1.45.1https://wiki.mjcactus.com/index.php?title=Acanthocalycium_thionanthum&diff=15Acanthocalycium thionanthum2026-03-25T09:21:56Z<p>162.158.210.116: Created page with "{{Taxobox | name = Acanthocalycium thionanthum | image = Acanthocalycium_thionanthum.jpg | kingdom = Plantae | family = Cactaceae | subfamily = Cactoideae | tribe = Trichocereeae | genus = Acanthocalycium | species = '''Acanthocalycium thionanthum''' | notes = Taxonomy follows Joël Lodé (2015–2019), with alternative classifications noted below. }} == Description == '''Acanthocalycium thionanthum''' is a small to medium-sized cactus species native..."</p>
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<div>{{Taxobox<br />
| name = Acanthocalycium thionanthum<br />
| image = Acanthocalycium_thionanthum.jpg<br />
| kingdom = [[Plantae]]<br />
| family = [[Cactaceae]]<br />
| subfamily = [[Cactoideae]]<br />
| tribe = [[Trichocereeae]]<br />
| genus = [[Acanthocalycium]]<br />
| species = '''Acanthocalycium thionanthum'''<br />
| notes = Taxonomy follows Joël Lodé (2015–2019), with alternative classifications noted below.<br />
}}<br />
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== Description ==<br />
'''Acanthocalycium thionanthum''' is a small to medium-sized cactus species native to Argentina. Plants are usually solitary, globose to short cylindrical, dark green to gray-green, reaching up to 12 cm in height and 10 cm in diameter.<br />
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The ribs are 9–15, rounded and slightly notched. Areoles are elliptical. Spines are awl-shaped, gray with darker tips, typically 1–1.5 cm long. Central spines (1–4) may be absent, while radial spines number 5–10.<br />
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Flowers are somewhat bell-shaped and variable in color, ranging from bright yellow to red or white, up to 4.5 cm in length and diameter. Floral tubes bear dark, spine-tipped scales along with hairs and bristles. Fruits are globose, dry, and dehiscent, up to 1 cm in diameter.<br />
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== Distribution ==<br />
* Argentina – Salta Province<br />
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== Taxonomy ==<br />
According to '''Joël Lodé''', this species is placed in the genus [[Acanthocalycium]].<br />
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However, in broader phylogenetic classifications, it is often included within [[Echinopsis]]. The species has a complex taxonomic history with numerous synonyms across different genera.<br />
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== Synonyms ==<br />
The following names have been applied to this species:<br />
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* ''Echinopsis thionantha'' – (Spegazzini) Werdermann (1931)<br />
* ''Echinocactus thionanthus'' – Spegazzini (1905)<br />
* ''Lobivia thionantha'' – (Spegazzini) Britton & Rose (1922)<br />
* ''Echinocactus chionanthus'' – Spegazzini (1905)<br />
* ''Lobivia chionantha'' – (Spegazzini) Britton & Rose (1922)<br />
* ''Echinopsis chionantha'' – (Spegazzini) Werdermann (1931)<br />
* ''Acanthocalycium chionanthum'' – (Spegazzini) Backeberg (1935)<br />
* ''Acanthocalycium brevispinum'' – F. Ritter (1964)<br />
* ''Echinopsis brevispinum'' – (F. Ritter) H. Friedrich & G.D. Rowley (1974)<br />
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=== Invalid or doubtful names ===<br />
* ''Acanthocalycium griseum'' – not validly published<br />
* ''Acanthocalycium catamarcense'' – considered synonymous<br />
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== Notes ==<br />
* Species shows high variability in flower color and spine development.<br />
* Frequently encountered under different generic names in horticulture.<br />
* One of the more widely distributed species within the genus.<br />
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== Cultivation ==<br />
This species is relatively easy to cultivate:<br />
* prefers well-draining mineral substrate <br />
* requires bright light for compact growth <br />
* tolerates cool temperatures if kept dry in winter <br />
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[[Category:Cactaceae species]]<br />
[[Category:Flora of Argentina]]<br />
[[Category:Trichocereeae]]</div>162.158.210.116