Hapu’u A hapu’u fern (Sadleria cyatheoides) on the Kaumana trail Related Posts Hāpuʻu Hāpuʻu Emesine Cave Kaumana Cave Share this:TweetWhatsAppEmail Author: Andrew An electrical engineer, amateur astronomer, and diver, living and working on the island of Hawaiʻi. View all posts by Andrew