Normal vs. Abnormal Fuzzy Growth on Melocactus and Vatricania

A large round cactus from Lanzarote developing 75% fuzzy coverage may be showing normal cephalium formation (reproductive structure) rather than disease.

Normal Cephalium (Flowering Zone)

• Melocactus: Develops woolly, bristly cap (cephalium) at maturity
• Vatricania: Dense golden wool at stem tips
• Discocactus: Similar cephalium
• Buiningia: Woolly apical zone

Key Differences: Normal vs. Pathological

Reference Species

• Melocactus azureus - blue body, white cephalium
• Vatricania guntheri - golden wool

Action

1. Compare photos to references above
2. If matches cephalium: congratulations—maturity reached!
3. If not: treat for mealybugs (alcohol, oil, systemic)
4. Send photos if uncertain

Cephalium formation is a milestone—these cacti flower and fruit from this zone. Do not remove it!

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