01730nas a2200217   4500008004100000245009400041210006900135260001200204300001400216490000800230520101600238653001901254653002301273653001501296653001801311653001301329653002301342100001701365700001301382856011701395       2005                        eng d00aA morphometric study of three closely related taxa in the European Isoetes velata complex0 amorphometric study of three closely related taxa in the European  c2005///  a459 - 4640 v1483 aIsoetes 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.10aEndemic plants10aHabitats directive10aIsoetaceae10aPteridophytes10ataxonomy10aThreatened species1 aRomero, M.I.1 aReal, C.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-23444461737&partnerID=40&md5=55726fd221d3cb5a1595b8d812d4fa75