Mammillaria marksiana
A small globose cactus, 5β12 cm across, with pyramidal tubercles, golden to brown spines and greenish to lemon-yellow flowers. It comes from rocky slopes of the Sierra Madre Occidental foothills in northwest Mexico, with a dry spring, summer monsoon rain and a cool, dry winter.
Where it grows wild
Arid to semi-arid rocky hillsides and scrub in the mountains of Sonora, Chihuahua, Sinaloa and Durango, often among rocks or under shrubs.
Literature gives about 400β2000 m; records here span 323β2073 m, median 933 m.
π 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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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 4.0 licence, unmodified.