Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 31
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A catalogue of the Bryophytes of the Guianas I. Hepaticae and Anthocerotae Naturalis
Gradstein, S.R.; Hekking, W.H.A..
This catalogue provides an annotated listing of the liverworts and hornworts from the Guianas (Guyana, Surinam, French Guiana), based on the literature and on new data that have become available in the framework of the “Flora of the Guianas” project. In total 375 species in 93 genera are recorded, including more than 100 species and 28 genera new to the Guianas. A list of synonyms (including 30 new ones), a systematic arrangement of the genera and families, and an index to the collectors are also given.
Tipo: Article / Letter to the editor
Ano: 1985 URL: http://www.repository.naturalis.nl/record/535264
Imagem não selecionada

Imprime registro no formato completo
A new Carex from Crete Naturalis
Gradstein, S.R.; Kern, J.H..
Rhizoma caespitosum. Culmus erectus, triqueter, laevis, inferne foliatus, 15-30 cm altus. Folia culmo multo breviora, viridia vel cinereo-viridia, 1½-2½ mm lata, breviter acuminata, apice scaberula vel sublaevia, vaginis brunnescentibus; ligulae latiores quam longiores, obtusae vel subacutae. Bracteae foliaceae, inflorescentia breviores longioresve, superiores baud vel breviter vaginatae, inferiores vagina usque ad 1½ cm longa instructae; vaginae antice appendicula membranacea in sicco facile destructa provisae. Spiculae 3-4, terminalis ♂, cylindrica, 1½ cm longa, 2 mm lata, laterales ♀, in superiore parte culmi dispositae, oblongo-cylindricae, usque ad 1½ cm longae, 3-4 mm latae, densiflorae, suprema sessilis, inferiores subsessiles vel breviter...
Tipo: Article / Letter to the editor
Ano: 1968 URL: http://www.repository.naturalis.nl/record/535076
Imagem não selecionada

Imprime registro no formato completo
A note on the Bryophytes of the Maltese Islands Naturalis
Gradstein, S.R..
A small set of bryophytes collected on the islands of Malta and Gozo in April-May, 1968, and April, 1969, by K. U. Kramer and L. Y. Th. Westra (Utrecht) was handed to the author for identification. The results are presented here as a supplement to a paper on the vascular plants of the Maltese islands (Kramer et al. 1972). The collections are deposited in the herbarium of the State University of Utrecht. In the past few years many new data have been published on the bryophytes of the Mediterranean islands, cf. Sunding (1967,1971), Koppe (1965), Lübenau & Lübenau (1970), Düll (1967), Gradstein (1971), and Townsend (1965). The liverwort flora of the Mediterranean coasts is being studied thoroughly by Jovet-Ast & Bischler (cf. 1968). Yet the bryophyte...
Tipo: Article / Letter to the editor
Ano: 1972 URL: http://www.repository.naturalis.nl/record/534794
Imagem não selecionada

Imprime registro no formato completo
Bryogeography of the Galapagos Islands Naturalis
Gradstein, S.R.; Weber, William A..
De las Islas Galápagos se conoce más de 200 especies de briófitas (el número total de los musgos y de las hepáticas es de mas o menos igual). Más que 2/3 partes de las especies occurren en la selva y matorrales perennifolias y húmedas limitadas a las zonas altas de algunas islas. Una proporción elevada (65-70%) de la brioflora trata de especies de una distribución amplia y neotropical o ampliamente tropical, que probablemente han llegado cón los vientos predominantes orientales del continente sudamericano. Generalmente las briófitas de las Islas Galápagos tienen una dispersión excelente, al contrario de otros grupos de organismos. Mas o menos 85% de las hepáticas produce esperes y/o gemmae y aproximadamente 40% de las especies son bisexuales. Además es...
Tipo: Article / Letter to the editor
Ano: 1982 URL: http://www.repository.naturalis.nl/record/535016
Imagem não selecionada

Imprime registro no formato completo
Bryum gemmiparum De Not. nieuw voor Nederland Naturalis
Gradstein, S.R.; Melick, H. van.
First record of Bryum gemmiparum de Not. from The Netherlands. The taxonomy and distribution of the species are discussed. Bryum gemmiparum was collected in a clay-pit along the river Maas in the north of the province of Limburg. This locality seems to be the northernmost one known of the species. Bryum gemmiparum was found growing on steep, rather humid, loamy soils in a luxuriant cover of bryophytes characterized by Anisothecium varium, Riccardia sinuata, Riccardia pinguis, Bryum bicolor, Didymodon tophaceus, and Mniobryum wahlenbergii. A floristical and ecological investigation of this highly interesting bryophyte vegetation in The Netherlands is needed.
Tipo: Article / Letter to the editor
Ano: 1972 URL: http://www.repository.naturalis.nl/record/535128
Imagem não selecionada

Imprime registro no formato completo
Catalogue of the bryophytes of Sulawesi. Supplement 1: new species records Naturalis
Ariyanti, N.S.; Gradstein, S.R.; Sporn, S.G.; Angelika, R.; Tan, B.C..
We report 177 bryophyte species (61 mosses, 115 liverworts, 1 hornwort) new to Sulawesi, raising the total number of bryophytes species recorded from the island to 653. The new combination Chiloscyphus morobeanus (Piippo) Gradst. comb. nov. is made.
Tipo: Article / Letter to the editor Palavras-chave: Bryophyte flora; Indonesia; Sulawesi.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/525978
Imagem não selecionada

Imprime registro no formato completo
Checklist of woody plants of Sulawesi, Indonesia Naturalis
Keßler, P.J.A.; Bos, M.M.; Sierra Daza, S.E.C.; Kop, A.; Willemse, L.P.M.; Pitopang, R.; Gradstein, S.R..
Sulawesi comprises of about 182,870 km² of land and fewer botanical specimens (about 23 specimens per 100 km², Whitten et al., 1987) have been collected here than in any other major island in Indonesia. This island is up to date botanically poorly explored and according to Van Steenis (1950) about 32,500 specimens of plants were recorded, the number is probably only a rough estimation and certainly in the precomputer era not based on real specimens. Within the framework of STORMA (Stability of Rainforest Margins) we analyzed the vegetation in several plots of one hectare of different land use systems at the Lore Lindu National Park, Central Sulawesi, Indonesia. Rapidly we were faced with the problem that the identification of the mostly sterile trees would...
Tipo: Article / Letter to the editor
Ano: 2002 URL: http://www.repository.naturalis.nl/record/526385
Imagem não selecionada

Imprime registro no formato completo
Contributions to a Monograph of the Lejeuneaceae Subfamily Ptychanthoideae Naturalis
Gradstein, S.R..
Lejeuneaceae include species with or without underleaves. Those with underleaves (the majority) have traditionally been classified (e.g. Spruce 1884) into “Lejeuneaceae Holostipae” (underleaves undivided) and “Lejeuneaceae Schizostipae” (underleaves bifid). This system has now become obsolete and has been replaced by a more natural classification into subfamilies, based on several gametophytic as well as sporophytic characters (Schuster 1984, Grolle 1983). The current subfamily system of Lejeuneaceae is shown in Table I, which also lists the genera containing holostipous species. From this table it becomes apparent that holostipous Lejeuneaceae are a clearly unnatural, polyphyletic group, comprising taxa of 5 different subfamilies. Two subfamilies and 34...
Tipo: Article / Letter to the editor
Ano: 1985 URL: http://www.repository.naturalis.nl/record/535186
Imagem não selecionada

Imprime registro no formato completo
Disjunct Hepaticae in tropical America and Africa Naturalis
Gradstein, S.R.; Pócs, T.; Váňa, J..
An increasingly large number of macrodisjunct species is emerging from recent literature dealing with taxonomy and floristics of tropical bryophytes. This paper reviews present knowledge concerning Afro-American disjunctions in Hepaticae and seeks to interprete the data in the light of current phytogeographical theory. Numerous new floristic records and range extensions are given and some taxonomic novelties are proposed. For 35 Afro-American species known three main distribution types are recognized, each further subdivided: Tropical Afro-American (lowland, montane and the alpine element), Subtropical-Mediterranean (southern, wide element) and Temperate-Subantarctic (southern, wide element). Most species belong to Jungermanniales except for the...
Tipo: Article / Letter to the editor Palavras-chave: Africa; America; Disjunction; Dispersal; Hepaticae; Plate tectonics; Phytogeography.; Taxonomy; Vicariants.
Ano: 1983 URL: http://www.repository.naturalis.nl/record/535250
Imagem não selecionada

Imprime registro no formato completo
Haesselia, a new genus of Cephaloziaceae (Hepaticae) from Mt. Roraima, Guyana Naturalis
Grolle, R.; Gradstein, S.R..
Haesselia roraimensis gen. et spec. nov. (Cephaloziaceae) from the foot of Mt. Roraima (Guyana) is described and figured. The new genus has been assigned to the subfamily Trabacelluloideae together with Fuscocephaloziopsis Fulf. and Trabacellula Fulf., two other neotropical genera of Cephaloziaceae with convex leaves.
Tipo: Article / Letter to the editor
Ano: 1985 URL: http://www.repository.naturalis.nl/record/535243
Imagem não selecionada

Imprime registro no formato completo
L'herbier de l'Université Louis Pasteur de Strasbourg (STR) IRD
Hoff, Michel; Gradstein, S.R..
Tipo: Text Palavras-chave: BOTANIQUE; HERBIER; INVENTAIRE; COLLECTION BOTANIQUE; PHYTOGEOGRAPHIE; HISTOIRE DES SCIENCES.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:34558
Imagem não selecionada

Imprime registro no formato completo
Lijst van de in Nederland voorkomende Levermossen Naturalis
Gradstein, S.R..
The new checklist of Dutch liverworts comprises 126 species, 1 subspecies and 5 varieties. Since 1962 seven liverwort species have been added to the flora: Barbilophozia hatcheri, Calypogeia muellerana, Cephalozia pleniceps, Fossombronia incurva, Haplomitrium hookeri, Lophozia perssonii and Plagiochila porelloides. Of twelve species presumed occurrence in the Netherlands needs verification. Nomenclature follows Grolle’s “Verzeichnis der Lebermoose Europas” (Feddes Repert. 87: 171-279. 1976), except for Isopaches, Leiocolea and Microlejeunea, which are maintained as genera and Phaeoceros carolinianus, Cephalozia lammersiana, Chiloscyphus pallescens, Lophozia silvicola and Lophocolea cuspidata. , which are treated as intraspecific taxa.
Tipo: Article / Letter to the editor
Ano: 1977 URL: http://www.repository.naturalis.nl/record/534876
Imagem não selecionada

Imprime registro no formato completo
New or otherwise interesting Bryophytes from Crete Naturalis
Gradstein, S.R..
This report deals with the results of the determination of bryophytes collected by the author in 1967 in the western District of Chanià on the island of Crete. 33 species new to Crete were discovered and a number of bryophytes were collected for the first time in the District Chanià. Some species listed here were previously known from only very few European localities: Riella notarisii, Solenostoma handelii, Rhamphidium rechingeri and Trematodon longicollis. Rhamphidium rechingeri has been found to be conspecific with the west-mediterranean Rhamphidium purpuratum Michx. A few remarks are made on the distribution of the bryophytes on the island. A relatively rich flora of liverworts is present in District Chanià, which is due to a high annual...
Tipo: Article / Letter to the editor
Ano: 1971 URL: http://www.repository.naturalis.nl/record/534726
Imagem não selecionada

Imprime registro no formato completo
Obituary Peter Arnold Florschütz (1923-1976) Naturalis
Gradstein, S.R..
On 27 May 1976 Peter Arnold Florschütz, bryologist, died at the age of only 53 at De Bilt, Netherlands. Only six weeks prior he had been hospitalized as a result of kidney cancer. His untimely death came as totally unexpected and shocking news to his friends and colleagues all over the world, many of whom had seen him in excellent health the year before at the Botanical Congress in Leningrad. He was a lector of botany and curator of the cryptogamic herbarium at the Institute for Systematic Botany and acting director of the Botanical Gardens of the University of Utrecht, the same institution where he had studied biology from 1941 to 1949. In his professional capacity he had held positions at the Institute for Systematic Botany from 1946 until 1949 as...
Tipo: Article / Letter to the editor
Ano: 1977 URL: http://www.repository.naturalis.nl/record/534931
Imagem não selecionada

Imprime registro no formato completo
Oil bodies in liverworts (Hepaticae) Naturalis
Gradstein, S.R..
A characteristic feature of the liverwort cell is the presence of “oil bodies”. Chemically they are made up of rather volatile terpenoids, mainly sesquiterpenes and their derivatives (Suire 1975) which seem to be surrounded by a membrane. The nature of this membrane is still unknown. Through the light microscope the oil bodies appear as colourless, rarely brownish or blueish organelles in the cytoplasm, showing great variation in shape, size, number and structure. The morphological characteristics of the oil bodies, which have been studied over 80% of the genera of Hepaticae, have been shown to be taxonomically significant (cf. Schuster 1966). While in the subclass Marchantiidae they are restricted to special, chloroplast-free “oil cells” of the...
Tipo: Article / Letter to the editor
Ano: 1978 URL: http://www.repository.naturalis.nl/record/535050
Imagem não selecionada

Imprime registro no formato completo
On the taxonomic significance of secondary metabolites in the Lejeuneaceae (Hepaticae) Naturalis
Gradstein, S.R.; Asakawa, Y.; Mues, R.; Klein, R..
Chemical analysis of representatives of about thirty genera of Lejeuneaceae has shown that the terpenoid and flavonoid content of the Lejeuneaceae is basically comparable to that of other Hepaticae and quite diversified. Among the terpenoids detected, some are common throughout the family (elemenenes, germacrenes), others are distributed more restrictedly and are indicative of evolutionary relationships among genera, e.g. borneols (Nipponolejeunea), pinguisanines (Acrolejeunea complex), striatenes (Ptychanthoideae, Omphalanthus complex), calamenanes ( Lopholejeunea) and labdanes (Ptychanthus, Tuzibeanthus). Flavonoids are present in smaller amounts than terpenoids and comprise some compounds unique to bryophytes (lutonarin, kaempferol-3-methylether). The...
Tipo: Article / Letter to the editor
Ano: 1985 URL: http://www.repository.naturalis.nl/record/535244
Imagem não selecionada

Imprime registro no formato completo
Proposals for the conservation of the "Sprucean” genera of Lejeuneaceae (Hepaticae) Naturalis
Gradstein, S.R..
The Lejeuneaceae are the largest family of the Hepaticae with over 1500 species in about 90 currently accepted genera (Gradstein, 1980). Much has already been written on the nomenclatural and taxonomic problems associated with the generic names in this family. A brief review of the problems is given, introductory to the proposals presented here. Current generic concepts in Lejeuneaceae are essentially based on Richard Spruce’s treatment of the group in his “Hepaticae of the Amazon and of the Andes of Peru and Ecuador” (Spruce, 1884). Spruce recognized, besides the monotypic Myriocolea Spruce, one single genus, Lejeunea, for several hundreds of species of Lejeuneaceae known at that time. This muchembracing genus was subdivided by Spruce into 37 subgenera....
Tipo: Article / Letter to the editor
Ano: 1982 URL: http://www.repository.naturalis.nl/record/534923
Imagem não selecionada

Imprime registro no formato completo
Revisie der Nederlandse soorten van het Bryum erythroearpum complex Naturalis
Gradstein, S.R.; Held, J.J. den; Wolff, P..
Revision of the Dutch species of the Bryum crythrocarpum complex. A revision is given of the collections of the Brya erythrocarpa from Holland. Delimitating the species of this group the authors have followed the monograph of the European Brya erythrocarpa by Crundwell & Nyholm (1964). 5 species have been found in Holland up till now: Bryum micro-eryithrocarpum C. MÜLL. & KINDB., B. radiculosum Brid,. B. klinggraeffii Schimp., B. violaceum Crundw. & Nyholm and B. ruderale Crundw. & Nyholm. The latter three have not been collected until 1968, B. violaceum and B. ruderale being recorded here for the first time from our country. These two species were discovered in the Southern part of the province of Limburg, a hilly area with rich,...
Tipo: Article / Letter to the editor
Ano: 1971 URL: http://www.repository.naturalis.nl/record/534893
Imagem não selecionada

Imprime registro no formato completo
Species richness and origin of the bryophyte flora of the Colombian Andes Naturalis
Gradstein, S.R.; Reenen, G.B.A. van; Griffin, D..
Based on data from the ECOANDES project, a phytogeographical analysis has been made of the bryophyte flora along the wet, foggy western slope (1000-4500 m) and the drier eastern slope (500-4500 m) of the Colombian Central Cordillera at the ‘Parque de los Nevados’. Species richness increases with altitude to the upper montane forest, which holds the largest diversity. Liverworts outnumber mosses in the upper submontane and montane forests on the western slope, but elsewhere, in drier environments, their number is lower and falls to below that of mosses. Furthermore, it appears that at lower altitudes, below 3000 m, wide-ranging tropical species prevail whereas narrowranging tropical species (andean and endemic element) and species of temperate origin are...
Tipo: Article / Letter to the editor Palavras-chave: Phytogeography; Species richness; Altitudinal zonation; Andes; Bryophytes.
Ano: 1988 URL: http://www.repository.naturalis.nl/record/535268
Imagem não selecionada

Imprime registro no formato completo
Studies on Colombian cryptogams. IIA. Hepaticae – Oil body structure and ecological distribution of selected species of tropical Andean Jungermanniales Naturalis
Gradstein, S.R.; Cleef, A.M.; Fulford, M.H..
This paper is the second (Florschütz & Florschütz-de Waard 1974) in the series of reports on cryptogams of Colombia, especially the high Andean bryophytes and lichens, in the framework of recent phytosociological and ecological studies in the area by A. M. Cleef and T. van der Hammen (Amsterdam) and his collaborators. The aim of these studies is to prepare comprehensive descriptions of the various Andean biota of Colombia as a basis for an evaluation of the biological diversity of the Andean environment of Colombia. This paper deals with the Hepaticae or liverworts and focuses on the structure of the oil bodies in the liverwort cell and the geographical and ecological distribution of the species. There are few papers on tropical Andean liverworts. The...
Tipo: Article / Letter to the editor
Ano: 1977 URL: http://www.repository.naturalis.nl/record/535100
Registros recuperados: 31
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional