royal tonguefern
- kingdom: Plantae
- phylum: Tracheophyta
- class: Polypodiopsida
- order: Polypodiales
- family: Dryopteridaceae
- genus: Elaphoglossum
- species: Elaphoglossum crassifolium
Fern Acres- Hau‘ula
Hawaii
United States
royal tonguefern Fern Acres Hau‘ula