Lygodium microphyllum
Foliage : Underside of spore-bearing leaflets of Old World climbing fern. Some leaflets produce spores; others don't. Spores can be carried by the wind to start new infestations.
Peggy Greb, USDA Agricultural Research Service, www.insectimages.org
(source URL: http://ecoport.org/ep?SearchType=pdb&PdbID=93150)
