Results 41 to 50 of about 596 (150)

A new striking and critically endangered species of Nasa (Loasaceae, Cornales) from North Peru [PDF]

open access: yes, 2019
Nasa angeldiazioides sp. nov. is described and illustrated. The species is restricted to two forest remnants on the western slope of the northern Peruvian Andes (Dept. Lambayeque) where it is found in the undergrowth of primary forest.
Acuña Castillo, Rafael   +4 more
core   +2 more sources

THE GIANT LOBELIAS: PACHYCAULY, BIOGEOGRAPHY, ORNITHOPHILY AND CONTINENTAL DRIFT [PDF]

open access: yesNew Phytologist, 1975
SUMMARYRecent revisions of the Asian, Jamaican and African species of pachycaul lobelias raise a number of evolutionary and biogeographical problems. Discussion of the apparent forest pachycaul ancestry of the African species is applied to problems of biogeography, pollination and Continental Drift. The available facts are accommodated in an hypothesis,
openaire   +1 more source

Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata (Rubiaceae), a distylous shrub in southeastern Brazil [PDF]

open access: yesRevista Brasileira de Botânica, 2010
Os atributos florais, a ornitofilia e o sucesso reprodutivo de Palicourea longepedunculata Gardner foram estudados em fragmento de Floresta Atlântica do sudeste do Brasil. Essa especie e um arbusto distilico que ocorre em sub-bosque umido de florestas.
Celice Alexandre Silva   +2 more
openaire   +1 more source

Fine-scale spatial genetic structure in the frankincense tree Boswellia papyrifera (Del.) Hochst. and implications for conservation [PDF]

open access: yes, 2016
The fine-scale genetic structure and how it varies between generations depends on the spatial scale of gene dispersal and other fundamental aspects of species’ biology, such as the mating system.
Addisalem, A.   +4 more
core   +4 more sources

Historical development of ornithophily in the western North American flora. [PDF]

open access: yesProceedings of the National Academy of Sciences, 1994
The 129 ornithophilous plant species in western North America have floristic affinities with one or the other of four geofloras: the Arcto-Tertiary flora (101 species), Madro-Tertiary flora (19 species), Madrean-Tethyan flora (8 species), and Neotropical flora (1 species).
openaire   +2 more sources

Ornithophily for the nonspecialist: Differential pollination efficiency of the Macaronesian island paleoendemic Navaea phoenicea (Malvaceae) by generalist passerines [PDF]

open access: yesAmerican Journal of Botany, 2017
PREMISE OF THE STUDY:A bird pollination syndrome exists in the Canary Islands archipelago across independent plant lineages despite the absence of specialist birds. The pollination efficiency of current floral visitors remains unknown for many plant species despite this being a fundamental factor in testing hypotheses about the origin of the syndrome ...
Fernández de Castro, Alejandro G.   +2 more
openaire   +3 more sources

How are pollination and seed dispersal modes in Cerrado related to stratification? Trends in a cerrado sensu stricto woodland in southeastern Brazil, and a comparison with Neotropical forests

open access: yesActa Botânica Brasílica, 2018
A comprehensive census of a hectare of cerrado s.s. in southeastern Brazil, a small-tree and scrub woodland physiognomy, allowed the evaluation of whether pollination and dispersal modes are correlated with the stratification of the vegetation and if so,
Gerhard Gottsberger   +1 more
doaj   +1 more source

Comparison of selected methods for the retrieval of neologisms [PDF]

open access: yes, 2008
The paper discusses and compares several semi-automatic methods used to extract neologisms from linguistic corpora. All the methods are based on the concept of discriminants, or textual features (both lexis and punctuation), that either precede (lexical ...
Paryzek, Piotr
core   +2 more sources

Plant-hummingbird interactions and temporal nectar availability in a arestinga from Brazil [PDF]

open access: yes, 2015
Hummingbirds are the most important and specialized group of pollinating birds in the Neotropics and their interactions with plants are key components to many communities.
Alves, Maria Alice S.   +3 more
core   +3 more sources

Diversidade beta de plantas que oferecem néctar como recurso floral aos beija-flores em cerrados do Brasil Central

open access: yesRodriguésia
Os ambientes abertos de Cerrado têm sido considerados ambientes marginais ou complementares para beija-flores, apesar do registro de considerável número de espécies deste grupo de visitantes florais.
Adriana Oliveira Machado   +1 more
doaj   +1 more source

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