01660nas a2200109 4500008004100000245014900041210006900190490000700259520122600266100001401492856004401506 2016 eng d00aDispersal and colonization in heterosporous lycophytes: palynological and biogeographical notes on the genus Isoetes in the Mediterranean region0 aDispersal and colonization in heterosporous lycophytes palynolog0 v553 aAfter a short review of the available information on dispersal in the heterosporous genus Isoetes, which has been the subject of some mainly anecdotal or occasional observations, a case study in the Mediterranean area is presented. In the geographical context given by the island of Sicily with its satellite islets and archipelagos, the distribution of terrestrial and amphibian Isoetes species was analysed to verify if any of them occurred in the oceanic (‘thalassogenous’) islets, never connected to the mainland. The only species revealed to be able to cross the geographical and ecological barrier represented by the sea and colonize some volcanic islands was Isoetes durieui Bory, a terrestrial polyploid species. On the basis of biological, ecological and morphological observations, including scanning electron microscope observations of the spores, the present work suggests that in this species – as in other terrestrial Isoetes species – animals could have a fundamental role in dispersal and dispersion, and synaptospory could be an important mechanism in dispersal events; in addition, polyploidy can be an important selective advantage for colonization events also in this group of vascular plants.1 aTroia, A. uhttps://isoetes.myspecies.info/node/23401720nas a2200133 4500008004100000245012100041210006900162300001200231490000700243520126200250100001401512700001601526856004401542 2015 eng d00aA conspectus of and key to Greek Isoetes (Isoetaceae), based on a reassessment of Haussknecht’s gatherings of 18850 aconspectus of and key to Greek Isoetes Isoetaceae based on a rea a391-4030 v453 aThe three Isoetes species recorded from Thessalia (Thessaly) in N Greece by Haussknecht, in 1899, under the names I. setacea, I. heldreichii, and I. phrygia, were reassessed using megaspore and microspore ornamentation in addition to macromorphological features. “Isoetes setacea” is not the SW European I. delilei to which the name I. setacea was generally misapplied, nor “I. echinospora” as it has been called due to a misunderstanding, but a so far undescribed species here named I. haussknechtii; it has not been found again in Haussknecht’s locality but has recently turned up in Peloponnisos and the E Aegean Islands. I. heldreichii, described from Haussknecht’s gathering, is apparently extinct. The record of I. phrygia was based on misidentified I. gymnocarpa. Even so, contrary to prevailing opinion, Haussknecht was justified in raising Boissier’s I. histrix var. phrygia to specific rank; genuine I. phrygia has recently been discovered in Kriti (Crete). The inventory of Greek Isoetes now comprises seven species, of which I. phrygia and I. todaroana are newly recorded here. Greek specimens studied are cited for all of them, and a key for their identification is presented. The names I. heldreichii and I. phrygia are typified.1 aTroia, A.1 aGreuter, W. uhttps://isoetes.myspecies.info/node/22701357nas a2200133 4500008004100000245007800041210006900119300001200188490000700200520094200207100001601149700001401165856004401179 2015 eng d00aDisentangling Isoetes setacea and removing threats to Isoetes echinospora0 aDisentangling Isoetes setacea and removing threats to Isoetes ec a811-8150 v643 aThe name Isoetes setacea has been applied to two different species, causing nomenclatural and taxonomic confusion. Some authors have rejected it on that account, yet it is currently used in a sense that is incompatible with its type. That type represents one of two similar species, I. echinospora and I. lacustris, which still today grow together at the type locality. An epitype is designated here, ensuring that I. setacea is sunk in synonymy under I. lacustris. A second name potentially threatening I. echinospora is I. tenella. It is currently regarded as a synonym of I. lacustris, but its type, a plate in Flora Danica, cannot be confidently identified, nor are there any specimens associated with it. Again, an epitype is designated to cement the current disposition of I. tenella and remove that second threat from I. echinospora. The correct name of the species generally misnamed I. setacea is I. delilei, here lectotypified.1 aGreuter, W.1 aTroia, A. uhttps://isoetes.myspecies.info/node/22500578nas a2200229 4500008004100000245002700041210002300068260004200091300000900133100001400142700001600156700001600172700001500188700002100203700001500224700001600239700001400255700001900269700001400288700001400302856003200316 2015 eng d00aIsoetaceae (vers. 1.0)0 aIsoetaceae vers 10 bFondazione per la Flora Italianacfeb a1-371 aTroia, A.1 aGreuter, W.1 aPeruzzi, L.1 aCecchi, L.1 aCristofolini, G.1 aDomina, G.1 aGreuter, W.1 aNardi, E.1 aRaimondo, F.M.1 aSelvi, F.1 aTroia, A. uhttp://www.floraditalia.it/01262nas a2200145 4500008004100000245007800041210006900119300001200188490000600200520081700206100001401023700001901037700001601056856004401072 2015 eng d00aLycopodiidae for the “Flora Critica d’Italia”: material and methods0 aLycopodiidae for the Flora Critica d Italia material and methods a215-2180 v63 aProcedures are presented that were followed during the preparation of the first pteridophyte family treatments for the “Flora Critica d’Italia”: Lycopodiaceae, Isoetaceae, Selaginellaceae. The work was mainly based on the study of literature and herbarium specimens. In some cases SEM observation of spores has proved useful. Data collected from herbarium specimens and other verified sources were loaded into a database, from which a distribution map was prepared for each taxon. Several preliminary papers have been published, and for each family a taxonomic conspectus, with type designations, maps and an identification key, has been prepared. The treatment of these three families for the “Flora Critica d’Italia” (in Italian) is about to be published or (Isoetaceae) has already been published.1 aTroia, A.1 aRaimondo, F.M.1 aGreuter, W. uhttps://isoetes.myspecies.info/node/21601275nas a2200145 4500008004100000245013800041210006900179300001200248490000800260520069500268100001400963700001900977700001600996856011701012 2014 eng d00aThe Isoetes longissima complex (Isoetaceae) in Italy: Observations on the morphology of spores and leaves, and taxonomic implications0 aIsoetes longissima complex Isoetaceae in Italy Observations on t a149-1560 v1743 aThe morphological variability of the Isoetes longissima complex in Italy has been analyzed, on the basis of selected herbarium specimens. Observations were made on spore ornamentation and size, number of leaves per plant and maximum leaf length, velum extension and alae width in the basal portion of leaves. The first count of chromosome number on plants from Italy is also made. On the basis of our observations, the five taxa here considered are attributed to two taxa, treated at the species level as follows: I. longissima (incl. I. velata and I. velata [unranked] sicula), and I. tiguliana (incl. I. dubia). Italian distribution of these species is also given. © 2014 Magnolia Press.1 aTroia, A.1 aRaimondo, F.M.1 aCampisi, P. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84904159896&partnerID=40&md5=b6cf14d277eb08c8b30062a4218c63ea01214nas a2200229 4500008004100000020001400041245005800055210005400113260003300167300001000200490000800210520058500218653001800803653001900821653001500840653001800855653001300873653001700886100001400903700001600917856005100933 2014 eng d a1126-350400aA critical conspectus of Italian Isoetes (Isoetaceae)0 acritical conspectus of Italian Isoetes Isoetaceae bTaylor & Francisc2014/01/08 a13-200 v1483 a

The work on the Isoetaceae account for the Critical Flora of Italy has resulted in a new, synonymic inventory of Italian Isoetes taxa, based on herbarium studies, observation by scanning electron microscopy and critical re-examination of the previously published works. Ten species are listed. The names I. longissima and I. gymnocarpa are restored as correct, to replace I. velata and I. subinermis, respectively. Eighteen lectotypes, one epitype and one neotype are designated. A dichotomous key to Italian taxa is provided.

10aItalian flora10aLycopodiophyta10amorphology10aPteridophytes10ataxonomy10atypification1 aTroia, A.1 aGreuter, W. uhttp://dx.doi.org/10.1080/11263504.2013.87840901183nas a2200133 4500008004100000245009400041210007100135300001400206490000800220520067200228100001400900700001800914856011700932 2013 eng d00aIsoëtes sabatina (Isoëtaceae, Lycopodiophyta), a new aquatic species from central Italy0 aIsoëtes sabatina Isoëtaceae Lycopodiophyta a new aquatic species a1052-10580 v1473 a

The new species Isoëtes sabatina is described and illustrated. Morphological, anatomical, and ecological characters are given. It differs from the similar I. echinospora by several characters, such as megaspore ornamentation and size, microspore size, velum extension and form, and also for its ecology. A table showing the main differential characters of the new species compared with those of the other European aquatic species is presented. So far, the species is known from a single locality (Bracciano Lake, central Italy), having a peculiar ecology and within the Mediterranean bioclimate. © 2013 © 2013 Società Botanica Italiana.

1 aTroia, A.1 aAzzella, M.M. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84880699237&partnerID=40&md5=930bbe9fe7a4ad1fcde7711bdfdb437d01363nas a2200253 4500008004100000245011200041210006900153260001200222300001600234490000700250520054000257653002100797653001500818653002800833653002000861653001700881653001400898653001800912100001400930700001400944700001900958700001600977856011600993 2000 eng d00aCasparian strips in the leaf intrastelar canals of Isoetes duriei bory, a mediterranean terrestrial species0 aCasparian strips in the leaf intrastelar canals of Isoetes durie c2000/// a1051 - 10540 v863 aAnatomical observations, using light and fluorescence microscopy, were made on leaves of Isoetes duriei to verify the presence of casparian bands around the intrastelar canals. This peculiar anatomical feature, previously reported for some Isoetes species, is confirmed. The possible role of this endodermis-like structure, in the transport of water due to root pressure or in the accumulation of certain metabolites, is discussed in relation to the ecological and anatomical features of the species. (C) 2000 Annals of Botany Company.10aCasparian strips10aEndodermis10aFluorescence microscopy10aIsoëtes duriei10aLeaf anatomy10aLycopsida10aMediterranean1 aRomeo, D.1 aTroia, A.1 aBurgarella, C.1 aBellini, E. uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0033765118&partnerID=40&md5=a1f956e770d2b3c59c0ac85d579f7c9c02028nas 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