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Background and aims: The geographical distribution of Tillandsia recurvata ranges from the southern United States to the center of the Argentine. The aim of this work is to report the presence of this species 200 km south of its known distribution and to discuss the causes that may have led to this range expansion. M & M: Specimens were collected in different locations in the province of Buenos Aires. Herbaria collections, on-line databases and bibliography were analyzed to corroborate the taxonomic identification and the distribution limit of the species. Results: We present novel records of Tillandsia recurvata that extend its geographic distribution 200 km towards the South, being the locality of Tandil the southernmost site of occurrence. Conclusions: Because the dates of collection and observations are recent, we consider that this advance occurred in the last decades. Possible causes are discussed, such as climate change and lignification of the Pampas. [ABSTRACT FROM AUTHOR]

The definition of limits of any geographic unit, based in the physiography of the landscape, is useful at the moment of developing environmental management politics and guidelines. Several authors have divided the Argentine Republic into regions according to the characteristics of native vegetation. The resulting units are known as phytogeographic provinces. The Monte Phytogeography Province is one of the largest ecoregions of the country and is defined as a unit where the environmental aspects are complex and difficult to categorize. In the present paper, a review of the limits of this phytogeographic province is made, according to bibliographic records of different authors. Survey trips were made and the collected data was georeferenced. A geographic information system was created with geodata and through records analysis, field work and adopting several criteria for its evaluation; the adjusted limits for the ecoregion were adjusted. A new map of the Monte Phytogeography Province is proposed for its use as input in the application of politics in the territory. [ABSTRACT FROM AUTHOR]

Salvia is the biggest genus from Lamiceae, with almost 900 species. In Argentina it is represented by 23 taxa (20 species, one subspecies, and two varieties), four of these are adventive taxa, the rest are native, and one of these is endemic. Species are distributed predominantly in the north region of the territory, reaching the provinces of La Pampa and Mendoza as the southern limit of its distribution. Each of the 23 Salvia taxa present in Argentina is described and illustrated, and a key for their identification is presented. Three new synonyms are proposed, Salvia borjensis new synonym of Salvia nervosa, Salvia durifolia new synonym of Salvia ovalifolia var. ovalifolia and Salvia alba new synonym of Salvia personata, and ten lectotypes are designated for: Salvia approximata, S. arenaria, S. ovalifolia var. villosa, S. pallida, S. procurrens, S. reflexa, S. serrata, S. stachydifolia, S. uliginosa, and Salvia sect. Pycnosphace. [ABSTRACT FROM AUTHOR]

Azorella is a genus with 26 species of Azorelloideae (Apiaceae) that grow from Costa Rica to the subantartic islands, being distintive and dominant in different environments of the Andean Cordilleras from Venezuela to Patagonia. The species of Azorella that grow in Argentina have been revised taxonomically in a previous study. However, knowledge of the remaining species is fragmentary and uneven. The aim of this paper is to update and standardize the information of the 11 species of Azorella absent in Argentina and present in Bolivia, Chile, Colombia, Ecuador, Peru and/or Venezuela. We provide descriptions for those species and update distributional maps, and we solve nomenclatural and typification problems for 41 names, designating 2 type species, 16 lectotypes and 1 neotype. In addition, we provide 10 new illustrations, and an identification key for all the species of the genus. [ABSTRACT FROM AUTHOR]

A new generic and specific record for the Argentinean Flora, Allamanda schottii Pohl (Apocynaceae), is documented. The species was found on the banks of the Paraná River, in north of Corrientes, Argentina. Synonymy, description, distribution, habitat, phenology, reproductive biology, common names, uses and observations are included. [ABSTRACT FROM AUTHOR]

The aim of this work was to study the pollen profile of clover and eucalyptus honeys from the Phytogeographic Pampean Province of Argentina, in order to contribute to its palynological characterization. Qualitative pollen analysis was performed. Descriptive and multivariate statistical techniques were applied to determine the frequency distribution of pollen and characterize each floral origin by pollen and year of harvest. 81 samples of honey from four different harvests were analyzed. 41 morphological types of pollen were found, which variation per sample ranged from two to eight. Eucalyptus sp. was the taxon present in over 80% of the honeys. There were pollen of Helianthus annuus and Carduus sp. in clover and eucalyptus honeys but pollen of Brassicaceae was only present in clover honeys. Pollen spectra showed differences between the studied years. [ABSTRACT FROM AUTHOR]

Spatial distribution of alien trees was studied on Pre-Delta National Park (PNPD-Entre Ríos, Argentina), by distance sampling techniques. Potential distribution was modelled by Kriging interpolation technique. Generated maps were overlapped with PNPD zonification map and environmental units map. We recorded forest structural data, tree phenology and tree control management actions, in order to characterize the processes of invasion. We obtained maps of potential distribution of Melia azedrach, Broussonetia papyrifera, Ligustrum lucidum, Brachychiton populneus, Fraxinus sp. and Morus alba L. The latter was the dominant species in all studied sectors (cliffs, islands and highlands). As for the management actions carried out with trees of the PNPD, about 50% of the specimens of M. alba subjected to mechanical control (banding technique) showed regrowth, indicating its high survival capacity. [ABSTRACT FROM AUTHOR]

A review of the Lycopodiaceae from Argentina and Uruguay, based on the study of relevant collections from herbaria as well as literature, is presented, according to the new classification of 16 genera grouped into three subfamilies. The family is represented by nine genera and 23 species; all taxa are described and at least one species of each subfamily is illustrated; one species (Huperzia saururoides) is lectotypified and three new synonyms are proposed: Austrolycopodium assurgens under Austrolycopodium erectum, Lycopodium sanctae-barbarae under Phlegmariurus saururus and Urostachys selago var. aschersonianus under Huperzia saururoides. Lycopodiella alopecuroides and Phlegmariurus subulatus are excluded from the studied area. Keys for all taxa are provided, as well as the relevant synonyms and a synthesis of the ecology and distribution. The most diverse genera are Phlegmariurus (seven species) and Austrolycopodium (five species). In Argentina, the family is represented by 22 species distributed in the three subfamilies. The northwestern region is the richest area of the country, with nine species. In Uruguay the family is represented by the subfamily Lycopodielloideae, with four species belonging to the genera Lycopodiella (two species), Palhinhaea (one species) and Pseudolycopodiella, represented by Pseudolycopodiella meridionalis. The latter, Palhinhaea camporum, and Huperzia fuegiana s. str. are new records for Argentina. [ABSTRACT FROM AUTHOR]

The morphological variation in vegetative and reproductive structures of Bauhinia mollis (var. mollis and var. notophila) and B. argentinensis (var. argentinensis and var. megasiphon) were studied. This detailed morphological study enabled us to correctly identify herbarium specimens and expand the geographic distribution of the taxa. New records of B. mollis var. mollis for Argentina and B. argentinensis var. argentinensis and B. argentinensis var. megasiphon for Bolivia, the latter considered endemic to Argentina, are here confirmed. Lectotypes were designated for Bauhinia mollis, B. mollis var guaranitica and B. appendiculata. [ABSTRACT FROM AUTHOR]

Tillandsia myosura (Bromeliaceae), new report for the Province of Buenos Aires, Argentina. Collected near Pereyra River, Provincial Park and Biosphere Reserve Parque Pereyra Iraola (Berazategui, Buenos Aires, Argentina). This species, known so far only for southern Uruguay and Catamarca, Cordoba, Jujuy, La Rioja, La Pampa, Mendoza, Salta, San Juan, San Luis, Santiago del Estero and Tucuman in Argentina, is cited for the first time the Province of Buenos Aires, expanding its southern limit of distribution in the country. A description and illustration along with a key to differentiate it from related species is given. [ABSTRACT FROM AUTHOR]

This paper includes four ornamental species of the genus Bryophyllum (Crassulaceae): B. daigremontianum (Raym.-Hamet & H.Perrier) A.Berger, B. delagoense (Eckl. & Zeyh.) Schinz, B. fedtschenkoi(Raym.-Hamet& H.Perrier) Lauz.-March. and B. pinnatum (Lam.) Oken, all naturalized in Argentina. The first three are new records for this country; for B. pinnatum, cited previously, its area is extended. Also includes an identification key, descriptions, distribution, ethnobotanical data, reference material and comments on their naturalization. [ABSTRACT FROM AUTHOR]

Cyrtopodium paniculatum (Ruiz & Pav.) Garay is described for the first time for the Argentine flora. Synonyms, some ecological observations and the key to distinguish it from related species are included. Besides, the identity of other species previously recognized for Argentina, C. pflanzii, is clarified. [ABSTRACT FROM AUTHOR]

After the most recent phylogenetic analyses of Gavilea, an updated taxonomic revision is presented here. A new combination, Gavilea chica, is proposed following the current monophyletic circums- cription of the genus. This revision includes: 1) the history of the genus, 2) a key to the 17 species of Gavilea, 3) descriptions and illustrations of most species, 4) updated geographical distribution of the species, including the extension of the range of distribution of G. platyantha and G. supralabellata to Río Negro and Tierra del Fuego (Argentina) respectively, 5) nomenclatural observations and, 6) a complete and updated list of synonyms for every species. Five lectotypes (Asarca araucana, G. australis, A. patagonica, G. supralabellata, and G. wittei) are also designated. [ABSTRACT FROM AUTHOR]

Guadua tagoara subsp. tagoara is reported for the first time in Argentina, it is described and illustrated. A map showing its geographical distribution in South America and a key to the species and subspecies in Argentina are also provided. A lectotype for Bambusa distorta is here designated. [ABSTRACT FROM AUTHOR]

Protected areas are spaces where biodiversity is preserved. They are designed to maintain the balance in natural ecosystems, to protect the species developed in the area and to preserve natural resources, cultural and environmental services. The Parque Luro Reserve is a protected area located at the centre-east of the department of Toay, La Pampa Province. The purpose of the reserve is to protect a small area of calden forest. The aim of this paper is to analyze the vegetation pattern in the Parque Luro Reserve. To achieve this, two tasks were carried out: the identification and the characterization of the representative vegetation of the calden forest in Parque Luro. The description of the vegetation allows for the comparison and classification of different vegetation units. The survey of floristic composition established its spatial distribution in different sectors of the area of study. The quantitative methods applied were Braun Blanquet scale and Dansereau's scheme based on transects. In addition, the quantitative technique of nearest neighbor was used. Through this study, two dominant forms of distribution of the vegetation were distinguished, one associated with the calden open savannah and the other with a closed calden area with presence of shrubbery. [ABSTRACT FROM AUTHOR]

Se presenta una descripción fitogeográfica de la provincia de Mendoza, enfocada en la distribución de licofitas y helechos. Se indica la clasificación botánica y se describe la distribución de familias incluyendo Aspleniaceae, Thelypteridaceae y Woodsiaceae, en la diversidad geomórfológica de Mendoza.

The rangeland carrying capacity of four fields (about 117,000 ha), located in the Malargüe department, Mendoza was estimated. These areas were included in "La Payunia" phytogeographic province. A floristic unit map was made through the interpretation of the area satellite image. An inventory of plant species was made in each unit and also the grazing degree was visually estimated. Linear transects (358) were distributed at random in the floristic units. The total plant and forage plant cover (%) and the carrying capacity were determined in each floristic unit. These determinations were made in different seasons during 2006 and 2007. The Field I had the greater number of forage species (19 to 30). It could sustain 9,203 goat equivalents (GE) or 1,538 cow equivalents (CE) in spring. In the Field II the number of forage species varied from 7 to 17. It presented the greater percentage of overgrazing area (38%). It could sustain 385 GE or 64 CE and 709 GE or 118 CE in winter and spring, respectively. The Field III had from 14 to 19 forage species. Only the 18% of its area was overgrazing. It could sustain as a minimum (winter) 10,206 GE or 1,715 CE. The Field IV presented the lower number of forage species (7 to 16). It could sustain 2,963 GE or 489 CE. For obtaining more accurate information on the carrying capacity, the evaluations should be made at least during one vegetative cycle (fall-winter and spring-summer). The characteristics of the floristic units of each field and the study of the herbivore diet composition carried out in the study area permitted to recommend the livestock species more adequate for the field use. [ABSTRACT FROM AUTHOR]

First citation of Lycopsis arvensis L. (Boraginaceae) for the province of Buenos Aires. [ABSTRACT FROM AUTHOR]

Torilis arvensis (Huds.) Link has been collected in the northeast of Buenos Aires province, Argentina, in urban areas, confirming its existence in the country as was predicted by Pedersen's contribution to the Flora Ilustrada de Entre Rios. This is a rare species in the United Kingdom, but classified as harmful plant in Spain and as a weed in several states of the United States of America. In our country, is regarded as an introduced naturalized plant, which may behave like invasive (plant strategist R) because, among other features, it is a therophyte producing abundant viable seeds. The present paper describes and illustrates this species, including the pollen grains which were studied using optical and scanning electron microscopy. [ABSTRACT FROM AUTHOR]

Miconia petropolitana is reported for the first time for the Argentinean flora and a lectotipification for this species is proposed. The species is described and illustrated and a map with the geographical distribution is provided. Miconia elegans is excluded from Argentina and an identification key for the species is included. [ABSTRACT FROM AUTHOR]

The species in the Sporobolus indicus complex are analyzed for Argentina. Sporobolus indicus var. indicus and S. indicus var. andinus are recognized for Argentina based on significant value differences in culms height and inflorescence length, and the altitude of collection area. The var. andinus is a new record for the Argentinean flora and it is here illustrated. Sporobolus jacquemontii is excluded from Argentina and S. minor is considered as a synonymy of S. indicus var. indicus. [ABSTRACT FROM AUTHOR]

A new record for the Argentinean flora, Samanea tubulosa, is described and illustrated. The specimens were collected in Oran, Salta Province, Argentina, in the "Selvas Pedemontanas" district of the "Yungas" phytogeographic province. Comments on the systematic position of the species and related genera are given. [ABSTRACT FROM AUTHOR]

Oncidium fuchsii Königer (Orchidaceae) is described for the first time for the Argentinean flora. Synonyms, some ecological observations and a key to differentiate the entity with which can made a mistake, are included. [ABSTRACT FROM AUTHOR]

This paper includes the first record of Carya illinoinensis (Wangenh.) K. Koch for Argentina, and considerations about its status in the context of the naturalization process. Also includes observations about exotic species of Juglans in this country. [ABSTRACT FROM AUTHOR]

Six new species of Malvastrum are described: M. boyuibeanum, M. Cristobalianum, M. ionthacarpum, M. pucariensis, M. trifidum and M. uniapiculatum and a new combination is proposed: M. Fryxellii. [ABSTRACT FROM AUTHOR]

This paper includes nine adventitious species of Prunus (Rosaceae, Prunoideae) present in Argentina. A key is presented to differentiate them. For all the species, it is indicated scientific name, common names, description, geographical distribution, uses, material studied and observations about their status of naturalization. [ABSTRACT FROM AUTHOR]

Peperomia nitida and P. armondii (Piperaceae, subgen. Rhyncophorum) are recorded for the first time for the Argentinean flora in the province of Misiones. The species are described and illustrated, and their geographical distributions are updated. A key to distinguish the Argentinean species of subgen. Rhyncophorum is included, and P. elongata is excluded from the Argentinean Flora. [ABSTRACT FROM AUTHOR]

A new record for argentinian flora, Aristolochia stomachoides Hoehne (Aristolochiaceae) from Misiones province is described and illustrated. Ecological information is given. Its distribution along Paraná River suggests the action of the water as agent of dispersion. [ABSTRACT FROM AUTHOR]

The genus Diastatea (Campanulaceae, Lobelioideae) is recorded for the first time for Argentina in antropic enviroments of the Yungas phytogeographic province (Jujuy), between 1,100 and 2,000 m. We describe and illustrate D. micrantha, the only species collected up to now, including a key to discern it from Lobelia xalapensis, its closest taxon. [ABSTRACT FROM AUTHOR]

Se presenta un inventario parcial de la flora y la vegetación de las zonas urbanas de la región centro-oeste de Argentina. Se describen las características de cada especie de plantas, citando sus rasgos botánicos, su familia y género y su distribución geográfica en la provincia. Entre las especies se encuentran Fraxinus L., Syringa L. y Osmanthus Lour.

Se presenta un inventario parcial de la flora y la vegetación de la provincia de Mendoza, Argentina. Se describen las características de cada especie de plantas, citando sus rasgos botánicos, su familia y género y su distribución geográfica en la provincia. Entre las especies se encuentran Pantacantha, Schizanthus y Reyesia.

The most recent studies about the genus Tabebuia and Handroanthus recognize two and six native species in Argentina, and one exotic cultivated species of Handroanthus in urban streets. Nevertheless, the genera are not completely understood, because some taxonomic conflicts are mentioned for the NWof Argentina (NWA). New collections made in Salta and Jujuy, and the revision of an important number of herbarium samples have confirmed a very high variability among the populations of the NWA region, and the subsistence of conflictive situations that prevented the correct identification of the species. Consequently, we considered it was necessary to make the revision of the genus analizing comprehensive material including all the phenological phases, in order to study most characters of every plant organ (young leaves, mature leaves, inflorescences, flowers, fruits and seeds). Our results indicate that the number of native taxa of Handroanthus is seven, including a new variety, and two of Tabebuia. Besides, another cultivated species of Tabebuia was identified, so there are two exotic taxa. All the entities are described, as well as the extant variability of native populations, and their distribution ranges in Argentina are provided. [ABSTRACT FROM AUTHOR]

During botanical explorations carried out in Malargüe, between 2003 and 2005, 940 specimens were collected, and 39 taxa are recorded for the first time for Mendoza province, Argentina. Characteristics of habitat and life form are given for each taxon. Common names of some of these taxa are given, based on the oral information obtained from the local people. [ABSTRACT FROM AUTHOR]

The cutworms complex in the semiarid oriental region of La Pampa province is integrated for: Agrotis malefida, A. gypaetina, Peridroma saucia y Pseudoleucania bilitura (Lepidoptera: Noctuidae). The present contribution is a synthesis of the available information on these four species that cause damages in the cultures. The group of the noctuidos is described and the biology is synthesized with special reference to the species mentioned previously. Also, for each one of the species it is provided the geographical distribution and a listing of host plants. The complex includes three neotropicales species (A. malefida, A. gypaetina and Pseudoleucania bilitura)', the distribution of the first one extends until the South of Neartida and a cosmopolitan species (Peridroma saucia). The information is emphasized taken place on the group in Argentina. [ABSTRACT FROM AUTHOR]

This is the first complete, floristic analysis of the Asteraceae family from an extense, endangered, subtropical area of Argentina, covered by the Misiones Province. This study reports 88 genera, 345 species and 16 infraspecific taxa of Asteraceae from the two phytogeographic units of Misiones Province: "Selvas Mixtas" District, and "de los Campos" District. Nine species are recorded for first time, and 23 are included as probable records for this area. This paper includes keys for tribes, genera, species and infraspecific taxa, as well as a short discussion about distribution of tribes, genera and habits in relation to political departments or phytogeographic districts. Habit, status, distribution, habitat, vernacular names, uses, and vouchers are given for every taxon. Thirty two taxa are illustrated for the first time. [ABSTRACT FROM AUTHOR]

Vicia macrograminea is confirmed for Argentina precisions about V. epetiolaris, V. graminea var. transiens and V. stenophylla are given. The geographical distribution of V. graminea is extended, and a new variety, Vicia epetiolaris var. microcarpa, is proposed. Also, the presence of V. andicola and V. setifolia in northwestern Argentina is confirmed. A key and illustrations to differentiate all studied species are included. [ABSTRACT FROM AUTHOR]

Materials from Argentina of adventitious species of Viola were examined and four species were confirmed: V. arvensis, V. metajaponica, V. odorata and V. tricolor. V. metajaponica is lectotypified, and the identity of V. japonica is discussed. A key to identify the species, their descriptions, illustrations, ecology and geographic distribution are given. [ABSTRACT FROM AUTHOR]

This work describes the structure and composition of plant communities from four wetland located in the Copahue Provincial Park (Neuquén Province, Argentina). The study was performed according to the method of the Zürich - Montpellier phytosociological School. Plant communities were distributed along an altitudinal gradient within the inferior montane belt, ranging from 1,400 to 1,800 m, and relationships with the superior montane belt wetlands (1,800 to 2,300 m) were established based on their floristic composition. Four new associations and one subassociation, grouped in the new alliance Juncion lesueurii, arise from the analysis of the syntaxonomical interpretation. [ABSTRACT FROM AUTHOR]

Cedrela is represented in Argentina by 5 taxa. A new species, Cedrela saltensis, is described and illustrated. A key, descriptions, synonymy, geographical distribution and illustrations of the Argentinian species are also provided. [ABSTRACT FROM AUTHOR]

The presence of the genus Rhipidocladum McClure is confirmed for Argentina, represented by two species. Rhipidocladum neumannii Sulekic, Rúgolo & L.G. Clark sp. nov., found in flowering and vegetative condition in Argentina, in Salta and Tucumán, and Bolivia, is described and illustrated. The presence of R. racemiflorum (Steud.) McClure is documented for the first time for the northwestern region of Salta. Rhipidocladum is described and the differences with the genus Merostachys Spreng. are included in a key. Some remarks about the morphology, flowering, geographical distribution and a doubtful specimen have been made. [ABSTRACT FROM AUTHOR]

The presence of Gloxinia gymnostoma Griseb. and Gloxinia nematanthodes (Kuntze) Wiehler for NW Argentina is reviewed. The first, has been previously cited with mixed materials and in consequence, with incorrect delimitation. Geographical distribution, morphological differences and pollen grain characters between both Argentinian entities of Gloxinia, are briefly pointed out. G. gymnostoma is here lectotypified. [ABSTRACT FROM AUTHOR]

The Phallales flora of central and west Argentina is revised Six genera and 11 species are recognised, Phallus rubicundus (Bosc) Fr. and Blumenavia rhacodes Moll are new reCORDs for Argentina, and the distribution area of 8 species is enlarged. A taxonomical key to the species is included. Exomorphological and anatomical studies were performed in all species An ontogenetical study was undertaken in Clathrus argentinus Domínguez, Lysurus periphragmoides (Klotzsch) Drign, Itajahya gatericulata Moll. and Phallus rubicundus (Bosc) Fr. [ABSTRACT FROM AUTHOR]

Thirty samples of honeys were analysed using the techniques proposed by Louveaux et al. (1978); 62 morphological types were identified. From the total, 53 belong to nectar plants and 9 to pollen plants. Nineteen samples had a mixed floral origin and 11 were monofloral from Lotus tenuis Waldst. et Kit. and Eucalyptus L' Hér. The analyses permitted botanic and geographic characterization of the honey. [ABSTRACT FROM AUTHOR]

This paper is a taxonomic revision of the genus Polygonum L in Argentina, with a discussion of the morphological characters of taxonomic importance, a description of the genus and a classification of the 20 species treated in 5 Sections. Polygonum (5 species), Amblygonon Meisner (1 species), Persicaria Meisner (11 species), Echinocaulon Meisner (2 species) and Tiniaria Meisner (1 species). For each species a description, illustrations of interesting characters, geographical distribution, observations and conclusions about the study of the type material, the information about karyology, phenology and probable uses are included. Some species or varieties previously cited for Argentina have been reduced to synonymy (Polygonum meisnerianum var. beyrichianum, P. lanigerum, P. portoricense, P. acuminatum var. microstemon and var. glabrescens, P. punctatum var. aquatile, P. berteroi, P arenastrum, P. persicarioides, P. cordobense and P. rivulare), P. polygaloides, P. spergulariaeforme and P. tenue are taxa erroneously cited for our country, while P. dumetorum is considered of doubtful presence in Argentina. [ABSTRACT FROM AUTHOR]

The genus Bauhinia comprises around 250 species and its distribution is pantropical. Six entities recognized for Argentina are grouped in three seccions: I. Bauhinia secc. Benthamia Fortun. et Wund. with B. uruguayensis Benth.; II. Bauhinia secc. Schnella (Raddi) Benth. p. p. with B. microstachya (Raddi) Macbr. and III. Bauhinia secc. Pauletia (Cav.) DC with B. bauhinioides (Mart.) Macbr., B. argentinensis Burk., B. forficata Link subsp. pruinosa (Vog.) Fortun. et Wund. and B. mollis (Bong.) D. Dietr. var. notophila (Griseb.) Fortun. B. argentinensis Burk. var. megasiphon (Burk.) Fortun. nov. comb. is proposed, as well as B. candicans Benth. is reduced to the synonymy of B. forficata Link subsp. pruinosa (Vog.) Fortun. et Wund. nov. comb.; also the synonymy of each section are presented. The species are described indicating its synonymy and geographical distribution and a key for their differentiation is included. [ABSTRACT FROM AUTHOR]

Thirty species of Inoperculate Discomycetes are described herein from the Nahuel Huapí National Park (Argentina), distributed among thirteen genera belonging to the following families: Hyaloscyphaceae, Dermataceae, Sclerotiniaceae y Helotiaceae. Three of them, namely, Calloria, Sphagnicola and Phaeohelotium are recorded for the first time for Argentina. Of the thirty species found, fifteen are new records for this country. The following new combinations are proposed: Cyathicula chlorosplenioides (Speg.) Gamundí (basinym: Helotium chlorosplenioides Speg.); Rutstroemia megalospora (Speg.) Gam. (bas.: Helotium megalosporum Speg.) y Rutstroemia microsperma (Speg.) Gamundí (bas.: Helotium microspermum Speg.). The paper contains a critical study of type material from Spegazzini's herbarium, and the description of a new species of the same general area: Phaeohelotium castaneum. [ABSTRACT FROM AUTHOR]

In this paper we provide new data on the distribution of two species of Poaceae in the Buenos Aires province, Argentina. [ABSTRACT FROM AUTHOR]

A list of ants from the Caldenal region (Espinal) is presented. Samples were taken in pitfall traps and manual collection, and data on the species found in the literature was added. The results were: total 63 species, 23 are new records. The species correspond to the subfamilies: Dolichoderinae (10), Ecitoninae (1), Formicinae (13), Myrmicinae (38) and Ponerinae (1). [ABSTRACT FROM AUTHOR]