Results 51 to 60 of about 1,332 (133)

Phylogenetic inference in Rafflesiales: the influence of rate heterogeneity and horizontal gene transfer [PDF]

open access: yes, 2004
BACKGROUND: The phylogenetic relationships among the holoparasites of Rafflesiales have remained enigmatic for over a century. Recent molecular phylogenetic studies using the mitochondrial matR gene placed Rafflesia, Rhizanthes and Sapria (Rafflesiaceae ...
Anderson, F E   +4 more
core   +4 more sources

Taxaceoxylon katuatenkum sp. nov. from the Koluel-Kaike formation (lower - middle eocene), Chubut, Argentina: a component of paleogene subtropical forests of Patagonia [PDF]

open access: yes, 2009
Se describe en este trabajo un fragmento de tallo silicificado, Taxaceoxylon katuatenkum sp. nov., coleccionado en la localidad Kilómetro 170, al SE de Chubut (Argentina).
Bellosi, Eduardo Sergio   +2 more
core  

Progress and problems in the assessment of flower morphology in higher-level systematics [PDF]

open access: yes, 2018
Floral features used for characterization of higher-level angiosperm taxa (families, orders, and above) are assessed following a comparison of earlier (precladistic/premolecular) and current classifications.
Endress, Peter, Matthews, Merran
core  

Medicinal Flora of the Popoluca, Mexico: A botanical systematical perspective [PDF]

open access: yes, 2018
We studied the medicinal plants used by the Popoluca of the Sierra de Santa Marta (eastern Mexico). Using Moerman's method of regression analysis we determined which ethnomedically used taxa are over-represented in the Popolucan pharmacopoeia (e.g ...
Fernando, Ramirez   +3 more
core  

Canopy habitat area effect on the arthropod species densities in the Azores: pondering the contribution of tourist species and other life histories [PDF]

open access: yes, 2010
"[…]. We performed a PIAR examining how plant cover area and plant crown structure influence the densities of arthropods in the canopies of one specific island, comparing various distinct natural reserves.
Borges, Paulo A. V., Ribeiro, Sérvio P.
core  

Rhodora [PDF]

open access: yes, 2001
Index v.76-100 ...
Fernald, Merritt Lyndon, 1873-1950   +2 more
core   +1 more source

Branch xylem density variations across Amazonia [PDF]

open access: yes, 2008
International audienceMeasurements of branch xylem density, Dx, were made for 1466 trees representing 503 species, sampled from 80 sites across the Amazon basin.
Aguilar, A.   +49 more
core   +1 more source

Effect of Hydrologic Restoration on the Habitat of The Cape Sable Seaside Sparrow, Annual Report of 2004-2005 [PDF]

open access: yes, 2006
The major activities in Year 3 on ‘Effect of hydrologic restoration on the habitat of the Cape Sable seaside sparrow (CSSS)’ included presentations, field work, data analysis, and report preparation.
Cooley, Hillary   +8 more
core  

Phylogenetics of Flowering Plants Based on Combined Analysis of Plastid atpB and rbcL Gene Sequences [PDF]

open access: yes, 2017
Following (1) the large-scale molecular phylogeny of seed plants based on plastid rbcL gene sequences (published in 1993 by Chase et al., Ann. Missouri Bot. Gard.
Bayer, Clemens   +9 more
core  

Metabarcoding identification of botanical origin of bee-collected pollen samples: comparison of ITS2 reference database performance before and after enrichment with sequences of bee plant species [PDF]

open access: yes, 2020
Mestrdo de dupla diplomação com a High Institute of Biotechnology of MonastirSequence analysis of complex DNA samples is an important approach to monitoring species distribution in biodiversity and population studies.
Ilahi, Wafa
core  

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