02599nas 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=fa39504c212fa1cc83a20ce72e22ce7b02028nas a2200265   4500008004100000245015000041210006900191260001200260300001200272490000700284520111700291653004701408653002001455653002101475653002001496653002301516653002001539653000801559653001101567653002201578100001401600700001401614700001701628856011701645       2012                        eng d00aMicromorphological approach to the systematics of Mediterranean Isoëtes species (Isoëtaceae, Lycopodiophyta): Analysis of the megaspore surface0 aMicromorphological approach to the systematics of Mediterranean   c2012///  a35 - 430 v513 aMegaspore ornamentation is one of the few morphological characters used in the taxonomy of the genus Isoëtes. In the present work, we test the application of this character for distinguishing some Isoëtes species occurring in the Mediterranean: Isoëtes sicula, which according to some authors should be included as a variety in I. histrix, and the recently described I. todaroana, whose affinity with other taxa is currently unknown. Two additional species (I. duriei, I. velata) were also included in the analysis. The megaspores were studied using scanning electron microscopy combined with energy-dispersive X-ray spectroscopy and chemical treatment. In all species, the megaspore surface is covered by a siliceous coating; removal of this coating reveals an underlying three-dimensional network of fused rodlets. A unique pattern of this network occurs in I. sicula, supporting its separation from I. histrix. Comparison between the patterns observed in the examined Mediterranean species shows that I. todaroana is most similar to I. histrix. © 2012 Copyright 2012 Collegium Palynologicum Scandinavicum.10aenergy-dispersive X-ray spectroscopy (EDS)10aIsoëtes duriei10aIsoëtes histrix10aIsoëtes sicula10aIsoëtes todaroana10aIsoëtes velata10aSEM10aSicily10asiliceous coating1 aTroia, A.1 aBazan, G.1 aSchicchi, R.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84859208191&partnerID=40&md5=8268047dea3226ff247ba747f4878e5d