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cheilanthes
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A revision of the Southern African species of Cheilanthes Swartz and Pellaea Link (Pteridaceae)
A revision of the Southern African species of Cheilanthes Swartz and Pellaea Link (Pteridaceae)
By Nicola C. Anthony
Some species of Notholaena, new and old
Some species of Notholaena, new and old
By William R. Maxon,Charles Alfred Weatherby,Lyman B. Smith,Robert C. Foster,Louis C. Wheeler
A new cloak-fern from Mexico
A new cloak-fern from Mexico
By William R. Maxon
The Argentine species of "Nothofaena"
The Argentine species of "Nothofaena"
By Charles Alfred Weatherby
A revision of the West Indian species of Selaginella
A revision of the West Indian species of Selaginella
By A. H. G. Alston
Ueber den norddeutschen sogenannten Wälderthon und dessen Versteinerungen
Ueber den norddeutschen sogenannten Wälderthon und dessen Versteinerungen
By Wilhelm Dunker