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1 July 2003 A Re-evaluation of Isoetes savatieri Franchet in Argentina and Chile
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Abstract
Isoetes savatieri has traditionally been interpreted as being a uniform aquatic ranging from the southernmost regions of South America to the central Andes of Chile and Argentina. An examination of herbarium material supports the recognition of two taxa, a southern I. savatieri and a more northern I. chubutiana, from central Chile and Argentina. The latter taxon is hexaploid and described here as a new species. The morphology of these species suggest that they are sister species resulting from divergence following a polyploidy event. These species, and several other species pairs, provide the best and, to date, only examples of allopatric divergence in polyploid Isoetes.
R. James Hickey, Cecelia Macluf and W. Carl Taylor "A Re-evaluation of Isoetes savatieri Franchet in Argentina and Chile," American Fern Journal 93(3), (1 July 2003). https://doi.org/10.1640/0002-8444(2003)093[0126:AROISF]2.0.CO;2
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