Mammillaria anniana
A small clustering Mammillaria from north-eastern Mexico, very rare in the wild. Grow it like other small eastern Mexican mammillarias: bright light, summer water and a cool, dry winter.
Where it grows wild
As for related small Mammillaria, presumably grows among rocks and in the light shade of shrubs. Habitat detail for this species is not documented in the sources used.
One record is at about 330 m in Tamaulipas. The other 14 cluster near 1,800 m in the central highlands.
🔒 Growing it like that
The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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More Mammillaria
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 2.0 licence, unmodified.