Kauai digit fernPteridaceae (Maidenhair fern family)Endemic the the Hawaiian Islands (Kauai only)IUCN: Critically EnangeredKauai (Cultivated)Underside of frond showing the sori.Frondwww.flickr.com/photos/dweickhoff/5490701911/in/photostream/
Although known as the Central American Lace Fern, this species is native as for south as Argentina. Adapted to dry areas. Adiantaceae. UC Berkeley Botanical Gardens.