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Polystichum lionelii (Dryopteridaceae), a new Andean species from northwestern Argentina
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Polystichum lionelii, a new fern species from the Andean mountain grasslands of northwestern Argentina, is described and illustrated. It is morphologically well differentiated from the other species occurring in the region, showing some relationships especially with P. pycnolepis particularly by the morphology of the pinnules. However, the new species differs from the latter in significant characters, the rhizome scales are ovate to ovate-lanceolate, the basal petiole scales are concolorous, and lamina with filiform scales and multicellular hairs on the abaxial side. An identification key to all Polystichum taxa currently known to occur in the northwestern Argentina is presented.
Title: Polystichum lionelii (Dryopteridaceae), a new Andean species from northwestern Argentina
Description:
Polystichum lionelii, a new fern species from the Andean mountain grasslands of northwestern Argentina, is described and illustrated.
It is morphologically well differentiated from the other species occurring in the region, showing some relationships especially with P.
pycnolepis particularly by the morphology of the pinnules.
However, the new species differs from the latter in significant characters, the rhizome scales are ovate to ovate-lanceolate, the basal petiole scales are concolorous, and lamina with filiform scales and multicellular hairs on the abaxial side.
An identification key to all Polystichum taxa currently known to occur in the northwestern Argentina is presented.
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