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.
Known as the Polished Maidenhair Fern, with a range from Mexico and the Caribbean to northern Peru. Photo from the Santa Marta Mountains of northeastern Colombia. In context at www.dixpix.ca/meso_america/Flora/primitive/index.html