• Publications
  • Influence
Eocene Patagonia Fossils of the Daisy Family
Fossil evidence suggests that daisies and sunflowers may have originated in South America more than 47 million years ago. Fossil capitula and pollen grains of Asteraceae from the Eocene of Patagonia,Expand
  • 63
  • 13
The Subfamily Mutisioideae (Asteraceae)
The subfamily Mutisioideae (74 genera, ca. 865 species), which comprises three tribes, Mutisieae (43 genera, ca. 500 species), Nassauvieae (25 genera, ca. 315 species), and Stifftieae (six genera, 48Expand
  • 72
  • 10
An extinct Eocene taxon of the daisy family (Asteraceae): evolutionary, ecological and biogeographical implications.
BACKGROUND AND AIMS Morphological, molecular and biogeographical information bearing on early evolution of the sunflower alliance of families suggests that the clade containing the extant daisyExpand
  • 60
  • 9
  • PDF
Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
Significance The flowering plant family Asteraceae (e.g. sunflowers, daisies, chrysanthemums), with about 23,000 species, is found almost everywhere in the world except in Antarctica. Asteraceae (orExpand
  • 70
  • 8
  • PDF
Pollen types in Southern New World Convolvulaceae and their taxonomic significance
Pollen morphology from 143 collections representing 11 genera and 75 species of native South American Convolvulaceae was analyzed with LM and SEM. Exine structure and sculpture allow to distinguishExpand
  • 31
  • 8
Pollen collected by honey bees (Apis mellifera L.) from south of Caldén district (Argentina): botanical origin and protein content
In the south of the Caldén district (Phytogeographical province of Espinal, Argentina) the availability of flowering along with the botanical origin and protein content of pollen harvested by honeyExpand
  • 60
  • 5
Bombus species and their associated flora in Argentina
Eight species of bumble bee (Bombus spp.) are found in Argentina. These bees are important pollinators of cultivated and native plants. Information on their distribution and forage requirements areExpand
  • 31
  • 5
Fossil pollen indicates an explosive radiation of basal Asteracean lineages and allied families during Oligocene and Miocene times in the Southern Hemisphere.
Abstract Much of our knowledge of the past distribution and radiation of Asteraceae and allied families depends on the fossil pollen record. In recent years, new discoveries are coming to light fromExpand
  • 31
  • 4
Caracterización botánica y geográfica de las mieles de la provincia fitogeográfica pampeana (República Argentina) III: noreste de la provincia de La Pampa
Twenty one samples of honey from the northeast of La Pampa province were analized using the techniques proposed by Louveaux et al. (1978). Thirty four types were identified. Eight samples have aExpand
  • 26
  • 3
Fossil pollen grains of Asteraceae from the Miocene of Patagonia: Nassauviinae affinity
Abstract Fossil pollen grains with morphological features unique in the subtribe Nassauviinae (tribe Mutisieae, Asteraceae) occur in Miocene marine deposits of eastern Patagonia, southern SouthExpand
  • 23
  • 2