A.  Dimech, ?Psilotum nudum?. .

EOL, ?Psilotaceae: Whisk Fern?. .

G.  Carr, ?Campus Plants?. 2010.

B.  Harry, ?Higher Plants & Ferns of National Park of American Samoa?. .

, ?Psilotum: Whisk Fern?. .

Department of Parks and Wildlife, ?Florabase?. .