Cephalium

A Cephalium is generally defined as the dimorphism between Sexually mature and immature cacti, often with the confluence of areoles, production of hairs, or periderm development at or underneath the areoles after flowering. The area of which denser spination and hair production at the apex is the definition most commonly is used. True cephalia occur at the apex of cacti, though this definition may be broadened to encompass for genera

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