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Microgramma
http://www.mobot.org/manual.plantas/055607/G055885.html
Species list from Manual de Flora de Costa Rica with hypertext links to specimen data.
Microgramma heterophylla (L.) Wherry
http://www.plantatlas.usf.edu/main.asp?plantID=2713
Taxonomic data and mapped distribution from Atlas of Florida Vascular Plants.
Microgramma lycopodioides (L.) Copel.
http://scitec.uwichill.edu.bb/bcs/staff/lec/Fern_species/microgramma_lycopodioides.htm
Distribution and other data from the Ferns of Barbados.