01720nas 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/22701542nas a2200145   4500008004100000245007100041210007000112300001200182490000800194520109600202100001801298700001901316700001701335856004401352       2015                        eng d00aStudies on chromosome numbers and spore size in Brazilian Isoëtes0 aStudies on chromosome numbers and spore size in Brazilian Isoëte  a226-2370 v1053 aThe lycophyte genus Isoëtes L. is nearly cosmopolitan, with approximately 350 species, 23 of which occur in Brazil. The lack of adequate distinguishing morphological characters in the leaves and stems, as well as the frequent cases of hybridization and polyploidy, makes the identification of species very difficult. Usually the spores provide the best characters for distinguishing species within Isoëtes, but these can vary in size because of polyploidy and hybridization. In this work we studied the variation in size of both mega- and microspores, and the relationship between size and ploidy level. We also present the first chromosome counts for seven species that are endemic to Brazil: I. goebelii (2n  =  33), I. martii (2n  =  44), I. maxima (2n  =  22), I. organensis (2n  =  66), I. ramboi (2n  =  44) I. smithii (2n  =  44), and I. spannagelii (2n  =  22). Our results suggest a correlation between ploidy level and spore size can be useful for the establishment of a preliminary hypothesis on polyploidy and hybridization among Brazilian Isoëtes.1 aPereira, J.B.1 aMittelbach, M.1 aLabiak, P.H.  uhttps://isoetes.myspecies.info/node/22601357nas 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/01370nas a2200133   4500008004100000245011400041210006900155300001200224490000800236520091400244100001801158700001601176856004401192       2015                        eng d00aStatus, Distribution, and Nomenclature of Northern Quillwort, Isoetes septentrionalis (Isoetaceae), in Canada0 aStatus Distribution and Nomenclature of Northern Quillwort Isoet  a174-1800 v1293 aThe lycophyte Northern Quillwort (Isoetes septentrionalis D. F. Brunton, sp. nov.) is the northern component of the riverbank Quillwort (I. riparia) complex. it is locally abundant in southeastern Ontario and southwestern Quebec and is also widely distributed in the northeastern united States. in Canada, it is largely confined to river and lake shores along post-glacial drainage outlets within the limits of the post-glacial Champlain Sea. it is frequently found in association with other Isoetes, especially Dodge’s Quillwort (I. ×dodgei A. A. Eaton), its sterile hybrid with Spiny-spored Quillwort (I. echinospora Durieu). the Canadian population of I. septentrionalis appears to be stable. Although first proposed at species level over a century ago, the nomenclature of this taxon has remained unresolved. It is clarified in the present study, in which I. canadensis var. robbinsii is lectotypified.1 aBrunton, D.F.1 aMcNeill, J.  uhttps://isoetes.myspecies.info/node/21901046nas a2200121   4500008004100000245008200041210006900123300001100192490000800203520065100211100001800862856004400880       2015                        eng d00aKey to the Quillworts (Isoetes: Isoetaceae) of the Southeastern United States0 aKey to the Quillworts Isoetes Isoetaceae of the Southeastern Uni  a86-1000 v1053 aAn illustrated key based on morphological, ecological and geographical characteristics is presented for the Isoetes taxa of the Coastal Plain, Piedmont and the eastern side of the Appalachian Mountains of Alabama, District of Columbia, Delaware, southern Maryland, North Carolina, South Carolina, Florida, Georgia, Mississippi, eastern Louisiana, southeastern Tennessee and eastern Virginia. The key includes 22 species, three additional subspecies/ varieties and nine sterile hybrids. It is primarily intended to serve as an investigative tool to assist field botanists engaged in conservation, floristic and ecological studies in the Southeast.1 aBrunton, D.F.  uhttps://isoetes.myspecies.info/node/21801006nas a2200145   4500008004100000245013500041210006900176300001200245490000800257520049600265100002000761700001700781700001800798856004400816       2015                        eng d00aIsoetes in Kamchatka (northern Russian Far East), with the Description of a New Hybrid I. x paratunica (I. asiatica x I. maritima)0 aIsoetes in Kamchatka northern Russian Far East with the Descript  a101-1120 v1053 aTwo species of Isoetes (Isoetaceae) occur in the Kamchatka Peninsula, northern Russian Far East — I. asiatica (Makino) Makino and I. maritima Underw. The distribution and ecology of these species are discussed. A hybrid of these species was found alongside its parental species in south Kamchatka in the shallows of a lake impacted by humans, and it is formally described here as I. x paratunica D. F. Brunton, Mochalova & A. A. Bobrov. It is the first Isoetes hybrid discovered in Russia.1 aMochalova, O.A.1 aBobrov, A.A.1 aBrunton, D.F.  uhttps://isoetes.myspecies.info/node/21701262nas 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/21601669nas a2200169   4500008004100000245007800041210006900119300001000188490000700198520116400205100001601369700001601385700001601401700001701417700002101434856004401455       2015                        eng d00aHydrochemical characterization of some stands of Isoetes dixitei in India0 aHydrochemical characterization of some stands of Isoetes dixitei  a63-700 v603 aIn the present study soil, water and plant samples were collected from seven different natural populations of Isoetes dixitei which are found growing on the tablelands of Satara and Kolhapur districts of Maharashtra, India. The collected soil and water samples have been analysed for the colour, texture, available plant nutrients, electrical conductivity, pH and BOD. The soil and water factors along with biotic factors are compared with the number of plants per m2, length of plants, number of leaves and roots per plant to understand the morphological diversity and biology within different populations of I. dixitei. The results of present analysis reveals that these ecological factors such as organic carbon, iron, phosphorus and potassium in soil and low pH of soil and water have positive relationships with the growth, robustness and diversity of I. dixitei. However, copper, zinc and electrical conductivity in the soil have negative significant role in influencing the plant characters. The role of manganese appears to be not significant. The biological factors play major role in controlling the diversity (number of plants per m2) of this taxon1 aYadav, B.B.1 aSingh, S.K.1 aDubey, N.K.1 aShukla, S.K.1 aSrivastava, G.K.  uhttps://isoetes.myspecies.info/node/21500970nas a2200157   4500008004100000245011600041210006900157300001200226490000700238520045600245100001600701700001600717700001600733700001900749856004400768       2015                        eng d00aUnraveling the taxonomy and nomenclature of the Isoetes histrix Bory species complex (Isoetaceae, Lycopodiidae)0 aUnraveling the taxonomy and nomenclature of the Isoetes histrix   a383-3870 v393 aBased on study of the lectotype of Cephaloceraton gymnocarpum Gennari, megaspore ornamentation, and chromosome number analysis of specimens from different Mediterranean areas, it is shown here that Isoetes gymnocarpa (Gennari) A.Braun is a species endemic to Sardinia, Central Italy, Corsica, and Baleares, different from the Mediterranean I. histrix Bory and from the mainly CE Mediterranean I. sicula Tod. (= I. subinermis (Gennari) Cesca & Peruzzi)1 aBagella, S.1 aPeruzzi, L.1 aCaria, M.C.1 aR., Filigheddu  uhttps://isoetes.myspecies.info/node/213