Isoetes velata A. Braun is an amphibious plant with Mediterranean and Ibero-Atlantic distribution, showing marked morphological variability. Within the same geographical area, closely related restricted-range taxa are also present, including I. velata ssp. asturicense (restricted to mountainous areas of the north-west Iberian Peninsula) and I. boryana (restricted to the southern French Atlantic coast). These related taxa have unclear taxonomy and are both threatened. We performed a morphometric study of specimens of the three taxa. Our results suggest that I. velata ssp. asturicense is better considered as a distinct species, I. asturicense Laínz (Laínz), distinguishable from the other two taxa by mean megaspore length (N ≥ 30) < 360 μm. In contrast, our results do not support consideration of I. boryana as a separate species, and we here propose that this taxon be considered as a variety, I. velata A. Braun var. boryana M.I. Romero & C. Real stat. nov. © 2005 The Linnean Society of London.
CITATION STYLE
Romero, M. I., & Real, C. (2005). A morphometric study of three closely related taxa in the European Isoetes velata complex. Botanical Journal of the Linnean Society, 148(4), 459–464. https://doi.org/10.1111/j.1095-8339.2005.00419.x
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