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Campyloneurum costatum (Kunze) C. Presl
http://hua.huh.harvard.edu/cgi-bin/Flora/flora.pl?ACT=desc&FLORA_ID=12395&TAXON_ID=233500306
Description and distribution map from Flora of North America online.
Campyloneurum costatum (Kunze) C. Presl
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=CACO20
Plant profile from USDA Natural Resources Conservation Service includes USA distribution map.
Campyloneurum costatum (Kunze) C.Presl
http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=17427
Taxonomic account from Integrated Taxonomic Information System (ITIS).
Campyloneurum costatum (Kunze) C.Presl
http://www.csdl.tamu.edu/FLORA/cgi/b98_map?genus=Campyloneurum&species=costatum
US distribution map.
Campyloneurum costatum (Kunze) C.Presl
http://www.plantatlas.usf.edu/main.asp?plantID=2246
Taxonomic data and mapped distribution from Atlas of Florida Vascular Plants.