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Paesia
http://www.mobot.org/manual.plantas/052667/G052839.html
Species list for "Manual de Flora de Costa Rica" with links to specimen data.
Paesia
http://www.anbg.gov.au/projects/fern/taxa/paesia.html
Key to species in Papuasia.
Paesia anfractuosa
http://www.inbio.ac.cr/bims/k03/p11/c043/o0226/f01486/g007555/s022408.htm
Specimen list from Instituto Nacional de Biodiversidad, Costa Rica.