Two of our most common NZ tree ferns, are both prevalent in the Tawa native bush reserves. Mamaku Our tallest tree fern, reaching up to 20m, mamaku (black tree fern/Cyathea medullaris) has distinctively black, scale covered koru as the fronds unfurl.The fronds extend up to 5m and can be as thick as a human armContinue reading “Know the native tree species in Tawa reserves with Gil Roper – Mamaku or Ponga?”