A floristic survey of pteridophytes of "Estação Ecológica do Panga" has been carried out since 1986. This Ecological Station covers an area of 409.5 hectares between the geographical coordinates 19°09'20"-19°11'10" S and 48°23'20"-48°24'35" W, it is situated about 30 km South of Uberlândia, at 740-840 m in elevation. This area is considered representative of the natural remnant vegetation of the region, being covered by different savannah physiognomies from open grassland to dense woodlands and forest formations. In this survey, 52 species of pteridophytes were found, 14 of them belonging to Macrothelypteris and Thelypteris genera (Thelypteridaceae). The species of Thelypteris are including in four subgenera (Amauropelta, Goniopteris, Cyclosorus, and Meniscium). Putative hybrid specimens between Thelypteris dentata (Forssk.) E. St. John and T. hispidula (Decne.) C. F. Reed were also recorded. The collected specimens are deposited in the herbaria HUFU, SP, and UC. The taxonomic treatment for the species of the genera Macrothelypteris and Thelypteris subg. Cyclosorus recorded in the area is presented. Field observations showed that the group occurs mostly in gallery forest and wetlands in the Panga area. Some species of subgenus Cyclosorus have showed large morphological variation in the study area. Keys for genera, subgenera and species are also presented.
Cyclosorus; Macrothelypteris; Pteridophyta; savannah; Thelypteridaceae
