01159nas a2200229   4500008004100000245008200041210006900123260001200192300001400204490000800218520044000226653001800666653001300684653002200697653001500719653001300734653002100747100001700768700001400785700001400799856011600813       2004                        eng d00aIsoetes fluitans sp. nov.: The identity of Spanish plants of 'I. longissimum'0 aIsoetes fluitans sp nov The identity of Spanish plants of I long  c2004///  a231 - 2360 v1463 aRecent revision of North African specimens of Isoetes velata A. Braun and the closely related taxon l. longissimum Bory, together with Spanish material conventionally designated I. longissimum, suggests that the Spanish specimens constitute a new species, I. fluitans. This is described and illustrated. The North African taxon I. longissimum is probably not specifically distinct from I. velata. © 2004 The Linnean Society of London.10aaquatic plant10aEndemism10aIberian peninsula10aIsoetaceae10ataxonomy10aThreatened plant1 aRomero, M.I.1 aAmigo, J.1 aRamil, P.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-6344262161&partnerID=40&md5=621cece2b24256d4cab656a85119d39501730nas 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=55726fd221d3cb5a1595b8d812d4fa7502599nas a2200253   4500008004100000245015300041210006900194260001200263300001400275490000800289520174100297653002202038653001702060653002302077653002102100653001702121653001802138653001902156653000802175653001302183100001402196700001802210856011702228       2005                        eng d00aA new species of Isoetes (Isoetaceae) from Turkey, with a study of microphyll intercellular pectic protuberances and their potential taxonomic value0 anew species of Isoetes Isoetaceae from Turkey with a study of mi  c2005///  a213 - 2280 v1473 aIsoetes anatolica sp. nov. is described from a population growing in seasonal ponds of a mountain near the southern coast of the Black Sea in Bolu, Turkey. It is a robust, amphibious quillwort, characterized by semiterete, carnose microphylls, semicircular foliar section, smooth cuticle, prominent cuticular pegs, stomata, several collenchymatous strands, abundant pectic filaments and connections in the cells of the translacunar diaphragms, incurved alae, well developed ligula, small carnose labium, no velum, well-formed bulliform megaspores and obscurely muriform microspores. Plants were investigated anatomically and a description with additional diagnostic characters is included. Morphological affinities with other species of the genus are discussed. Intercellular pectic protuberances (IPP) were studied in the cells of the translacunar diaphragms of the microphylls of several species of Isoetes including I. anatolica. The IPP were examined to determine if they could provide diagnostic characters. They were detected with TBO and analysed using light and scanning electron microscopy. Types of IPP and species bearing them were as follows: warts in I. adspersa, I. andina, I. boliviensis, I. duriei, I. engelmannii, I. lechleri, I. longissima, I. melanopoda, I. storkii, I. velata. ssp. velata, and I. velata ssp. asturicense; warts and filaments in I. brochonii, I. lacustris, and I. setacea, and connections in I. anatolica and I. malinverniana. IPP are lacking in I. boryana, I. echinospora, I. histrix and I. novogranadensis. Combination of type, density, and distribution of IPP promises to be a useful vegetative character in a genus in which diagnostic characters are scarce. © 2005 The Linnean Society of London.10aIsoetes anatolica10aLeaf anatomy10aPectic connections10aPectic filaments10aPectic warts10aPteridophytes10aSeasonal ponds10aSEM10ataxonomy1 aPrada, C.1 aRolleri, C.H.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-13844276026&partnerID=40&md5=fa39504c212fa1cc83a20ce72e22ce7b