The impacts of forest fragmentation on the pteridophyte communities of the Una region of Bahia, Brazil, were investigated by comparing species richness and ensemble diversity among areas of large ...
A survey of over 100 algific talus slope sites in northeastern Iowa for individuals of the genus Gymnocarpium revealed the presence of two additional taxa in the Iowa Pteridophyte flora. Gymnocarpium ...
Pteridophyte hybrids and their derivatives / by Irving W. Knobloch Smithsonian Libraries and Archives ...
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