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On the occasion of preparing the Flora of Cordoba, new records for the Argentinean flora have been registered as a result of intensive field trips and the revision of the main herbaria collections of the country. In this paper, three new records for the native flora and 17 for the introduced flora (casual aliens and naturalized species) of Argentina are presented. Descriptions, illustrations and a lectotypification are done. Furthermore, the presence of 10 introduced species is formally documented for the first time. [ABSTRACT FROM AUTHOR]

The article discusses the findings of a study to describe the morphology of the new Famatinanthus genus of Asteraceae flowering plant found in the Andes of Argentina. It notes that the study was conducted through field observations and stereomicroscope examination of the herbarium specimens. Researchers have tentatively assigned Famatinanthus to the Onoserideae tribe due to its shrubby habit, solitary capitula, and bilabiate marginal corollas, and rounded style branches.

Differentiation of Argentinean Clinopodium (Lamiaceae: Nepetoideae) species through morphological and anatomical fruits characters. An integral study of fruits belonging to native Argentinean species of Clinopodium (Lamiaceae: Nepetoideae: Mentheae: Menthinae) has been made with the following aims: a) to characterize its exomorphology and anatomy; b) to correlate the pericarp structure with the phenomenon of the myxocarpy; c) to assess the incidence of the carpological characters to differentiate the species. Observations have been carried out using light and scanning electron microscope. Shape, size, surface ornamentation, indumentum and shape of abscission scar were the most diagnostic value features. Myxocarpy was proved in the genus but this phenomenon is not consistent in all the studied species. The pericarp structure revealed two anatomical patterns, each one associated with the production of mucilage, whereas the outer region of the mesocarp varies according to the species. Some taxonomical considerations have been discussed. [ABSTRACT FROM AUTHOR]

Sixteen species of Jaborosa (Solanaceae), including eight endemic to Argentina, were studied karyologically. The numbers n = 12 and/or 2n = 24 were found in all species, the majority of the cases being new reports. Mitotic chromosomes were small- to medium-sized, the average length varying from 2.95 to 4.93 µm. All species had one to three chromosome pairs with satellites. The karyotypes, obtained for 13 species, were slightly asymmetrical: A1 ranged from 0.228 to 0.483, A2 ranged from 0.095 to 0.182, and Paszko's asymmetry index ranged from 0.84 to 3.47. In all species, metacentric chromosomes were the most common, followed by submetacentrics, but subtelocentrics were rare. Morphological similarities and sectional arrangements were not reflected in either a principal components analysis plot or asymmetry index plot, but the species could be singled out by their karyotype formulae and the different karyotype parameters taken. In Jaborosa, a notably diversified genus, exo-morphological evolution has taken place, together with evident chromosome rearrangements, whose disposition is different and not as clear as in related genera. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 156, 467–478. [ABSTRACT FROM AUTHOR]

Solanum delicatulum, a species only known to southern Brazil, is reported for the first time for Argentina and Paraguay. The species is described and illustrated, and a discussion about its synonymy is also provided. [ABSTRACT FROM AUTHOR]

Persicaria capitata (Polygonaceae, Polygonoideae, Persicarieae), a species native from Nepal, and the genus Persicaria, are newly recorded for the introduced flora of Argentina. This species occurs in different habitats at the Natural Reserve La Cumbrecita (province of Córdoba). A detailed species description and a discussion about its status in the naturalization process are included. [ABSTRACT FROM AUTHOR]

Very few Solanaceae species are able to grow in saline soils; one of them is Lycium humile. This species is endemic to the Altiplano-Puna region (Central Andes, South America) where there are multiple extreme environmental conditions such as hypersaline soils. Here we present an updated description and distribution of L. humile including its new record for Bolivia at the edges of "Salar de Uyuni", the largest salt flat in the world; we discuss its ecological role in saline environments by analyzing soil salinity and coverabundance values of the studied sites. According to IUCN criteria, we recommend a category of Least Concern for L. humile, but the growing development of lithium mining in saline environments of the Altiplano-Puna region may potentially threaten exclusive communities. [ABSTRACT FROM AUTHOR]