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=fa39504c212fa1cc83a20ce72e22ce7b02202nas a2200241   4500008004100000245007100041210006800112260001200180300001400192490000700206520146300213653001401676653003301690653001201723653001101735653001101746653001601757653002801773653001001801100001801811700001401829856011701843       2007                        eng d00aFoliar diagnostic characters in Isoetes (Pteridophyta, Isoetaceae)0 aFoliar diagnostic characters in Isoetes Pteridophyta Isoetaceae  c2007///  a202 - 2350 v943 aFoliar characters were studied in 25 European, North African, North American, and South American terrestrial, amphibious, and aquatic: taxa of the genus Isoetes L. (Pteridophyta, Isoctaceae). The foliar characters investigated have a variable diagnostic value. The presence and types of cuticular ornamentations, types of margins, epidermal patterns and cell ratios of the epidermis, types of IPP (intercellular peetic protuberances) in the cells of the leaf diaphragms, epidermal patterns and cell ratios of velum, epidermal patterns, and nature of walls in the adaxial epidermis of sporangia may be good diagnostic specific characters that should be included in taxonomic descriptions. Transverse sections of the microphylls, the types and distribution of collenchyma (fascicular, lacunar, or partially laminar collenchyma, with the latter two types described here for the first time), the cell types of leaf diaphragms, the presence of IPP in these cells, the partial or complete endodermis in the air chambers, and the presence of a persistent mucilage-secreting or an early lignified ligule are features that characterize species groups in Isoetes. The mucilage-secreting ligula and the types of endodermis can be considered as generic traits in Isoetes. The genus was hugely considered as lacking good diagnostic characters or having rather environmentally influenced traits, two concepts that are discussed here after presentation of the new evidence.10aEpidermis10aFoliar diagnostic characters10aIsoetes10aLabium10aLigula10aMicrophylls10aSporangial adaxial wall10aVelum1 aRolleri, C.H.1 aPrada, C.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-34248570912&partnerID=40&md5=aa7a39e226168462b49230d818ab3991