Gymnocalycium mesopotamicum
A small, flattened Gymnocalycium from the low grasslands of Corrientes in northeastern Argentina, between the Paraná and Uruguay rivers. Unlike most cacti it comes from a warm, wet lowland with rain in every month, so it wants regular summer watering, some shade from the strongest sun and only a mild, fairly dry winter rest.
Where it grows wild
Low grassland and rocky outcrops in the Corrientes lowlands, where the small plants sit among grasses that shade them partly. Detail beyond the measured site is from the genus and region, not species studies.
The single measured site is at 87 m; the species is a lowland plant of northeastern Argentina.
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The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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More Gymnocalycium
Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.