One of the common tropical American species has long been known under the name Elaphoglossum Lindenii (Bory) Moore, founded on Acrostichum Lindenii Bory ex Fee (1845). Recently, Christensen2 has taken up the name Elaphoglossum squamatum (Swartz) Moore for this species. This was based on Acrostichum squamatum Swartz (1806), a new name given to A. squamosum Cav. (1799), not A. squamosum Swartz (1801). However, since the species of Cavanilles is the older, there was no need for any change in its name. Therefore, by Article 60, Section 2, of the International Rules of Nomenclature, the name A. squamatum Swartz is illegitimate and the combination Elaphoglossum squamatum is equally illegitimate. Thus the correct name still remains E. Lindenii, because, although Acrostichum squamosum Cav. is the oldest specific name for the group, that specific epithet may not now be transferred to Elaphoglossum because of the existence of the name E. squamosum (Swartz) J. Sm. The synonymy may be summarized as follows: