Nicolás F. Brignone

Instituto de Botánica Darwinion · Botany

La familia Papaveraceae consta de 42 géneros con ca. 775 especies, distribuidas principalmente en las zonas templadas del planeta (sobre todo el hemisferio norte), estando prácticamente ausentes en áreas netamente tropicales. Las Fumariaceae se incluyen dentro de las Papaveraceae de acuerdo con varios análisis filogenéticos morfológicos y molecular...

La familia Ulmaceae comprende, en su actual circunscripción, seis géneros y ca. 40 especies; los taxones tienen distribución cosmopolita, en zonas tropicales y templadas. En la Argentina está representada por un género y una especie nativa, Phyllostylon rhamnoides (J. Poiss.) Taub.

Calyceraceae comprises 46 species mostly endemic to the Andes and Patagonia in Southern South America, and it is the sister family of Asteraceae, one of the largest Angiosperm families. With a robust phylogeny and with an exceptionally good sampling fraction, we performed macroevolution and biogeographic analyses to understand paleodiversity dynam...

• Background and aims. Atripliceae evolved and diversified by dispersals and radiations across continents on both hemispheres, colonizing similar semi-arid, saline-alkaline environments throughout the world. Meanwhile, its species developed different life forms, photosynthetic pathways, mono- or dioecy, and different morphological features in flowe...

The genus Cardionema (Caryophyllaceae) is native to the New World and it comprises six species of perennial herbs, with spiny leaves and sepals, membranous stipules and bracts, and reduced petals. This study aims to update the richness, morphology and distribution of Cardionema in Argentina, based on the study of herbarium specimens. Four species o...

Atriplex is the most species-rich genus of Amaranthaceae and one of the largest C4 clades in eudicots. Distributed predominantly in the arid subtropical and temperate regions worldwide, many Atriplex species dominate the plant communities of harsh and inhospitable inland and coastal habitats. Current threats of aridification and salinisation increa...

This paper is the second in a series treating the Amaranthaceae s.l. in South America. We present here a taxonomic revision of tribes Salicornieae and Suaedeae (subfamily Salicornioideae) based on the study of herbarium material, type specimens, digital images, original publications, and field observations. The South American Amaranthaceae s.l. flo...

This paper is the first in a projected series of publications treating the Chenopodiaceae in South America. We present here a taxonomic revision of subfamilies Betoideae, Camphorosmoideae, and Salsoloideae in South America, where all representatives of these subfamilies are introduced. Our research is based on the study of herbarium material, type...

En la Argentina las Aizoaceae están representadas por 8 géneros con 11 especies, la mayoría introducidas. Trianthema argentina Hunz. & Cocucci es la única especie nativa del país. In Argentina, the Aizoaceae are represented by 8 genera and 11 species, mostly introduced. Trianthema argentina Hunz. & Cocucci is the only native species in the country...

Familia monotípica exclusiva de la Argentina.

En la Argentina se hallan representados 16 géneros y 91 especies de Chenopodiaceae, siendo 67 nativas y 24 introducidas. The Chenopodiaceae in Argentina are represented by 16 genera and 91 species, being 67 native species and 24 introduced.

Introducción y objetivos: Juncus es el género más grande y diverso de Juncaceae, distribuido en zonas templadas de ambos hemisferios. La flora del Cono Sur contiene ca. 38 especies de Juncus (44 taxones que incluyen 12 categorías infraespecíficas). Dieciséis de esas especies pertenecen a la sección Ozophyllum. Como parte de nuestros estudios ecológ...

Background and aims: Juncus is the largest and most diverse genus of Juncaceae, distributed mainly in the temperate zones of both hemispheres. The Southern Cone flora contains ca. 38 Juncus species (44 taxa including 12 infraspecific categories). Sixteen of those species belong to the section Ozophyllum. As a part of our ecologic studies in wetland...

As a part of ecologic studies conducted in wetlands of Patagonia, Argentina, and in the frame of taxonomic studies within Chenopodiaceae for South America, we collected specimens of Suaeda that did not match the features to any of the species currently known to the Flora of Argentina. The aim of this contribution is to report for the first time the...

With ca. 300 species of herbs, shrubs and subshrubs adapted to saline or alkaline soils, the evolution of the genus Atriplex is key to understand the development of semi‐arid environments worldwide. Previous phylogenetic analyses of Atriplex, including only a few species from South America, especially in comparison with North American species repre...

The Calyceraceae (47 spp.) is a small family of plants that is sister to the Asteraceae (∼ 25,000 spp.), one of the largest families of angiosperms. Most members of Calyceraceae are endemic to the Andes and Patagonia, representing an excellent model within which to study diversification patterns in these regions. The single phylogenetic study of Ca...

As a part of ongoing studies of the genus Atriplex for South America, the name A. pentandra is investigated, and a neotype is here designated. Also, a complete illustration of this species is here provided.

En el presente trabajo se realizó un relevamiento de las actividades sobre estadística descriptiva en libros de texto de matemáticas comúnmente utilizados en la educación media en Argentina. El análisis contempló aspectos relacionados con la exigencia cognitiva, la interrelación de conceptos y el contexto de las actividades. Se detectó una gran can...

This is the first integrative synopsis of the genus Atriplex L. for South America, based on the study of compared external morphology of extensive collections from South American herbaria, type material, digital images, original publications and field observations. The South American Atriplex flora includes 55 species, 45 of which are native specie...

Chusquea Kunth (Poaceae, Bambuseae) es el género de bambúes leñosos más diverso del mundo. En los bosques andino-patagónicos de la Argentina y Chile, dentro de la provincia biogeográfica Subantártica, 7 especies de Chusquea son el componente dominante del sotobosque. Chusquea andina Phil. y C. culeou E. Desv. fueron descritas para la Argentina y Ch...

Boopis australis Decne es una de las especies de Calyceraceae con distribución geográfica más amplia, que incluye hierbas rizomatosas con brotes aéreos rosulados a caulescentes y crecen desde el norte de Tierra del Fuego hasta el norte de Neuquén y sur de Río Negro. Habitan ambientes muy diversos de la estepa patagónica: mallines, inmediaciones de...