Copiapoa solaris

Surviving in an environment that experiences virtually zero measurable annual rainfall, this collection is an extreme fog-dependent specialist. It relies entirely on the dense camanchaca fog that rolls inland during the cooler autumn, winter, and spring mornings, capturing moisture via the thick, densely felted, yellowish-white wool that blankets the plant's apex. The collected water is funneled down to a massive, water-storing subterranean root system. During the stagnant, high-heat intensity of mid-summer, the plant shuts its metabolism down entirely, dropping into a protective state of dormancy where the apical wool and heavy spines shield it from solar scorching. In late summer, it pushes small, satiny yellow flowers directly out of the dense crown wool (a feature so uniquely hairy it earned the subgenus name Pilocopiapoa). In cultivation, it is legendary for its exceptionally slow growth rate on its own roots; it demands an uncompromisingly sharp, 90% to 95% purely mineral substrate (premium volcanic pumice, decomposed granite, and crushed quartz with zero uncomposted organics) and must be watered with extreme restraint only during warm, breezy weather. https://www.cl-cactus.com/fn.asp?FnID=10992802200317130859