Amborella trichopoda Baill., a New Morphological Type of Vesselless Dicotyledon

  title={Amborella trichopoda Baill., a New Morphological Type of Vesselless Dicotyledon},
  author={Irving W. . Bailey and B. G. L. Swamy},
  journal={Journal of the Arnold Arboretum.},

Evolution of Microsporogenesis in Angiosperms

The predominance of simultaneous microsporogenesis in extant basal angiosperms and in land plants in general indicates that simultaneous microSporogenesis is plesiomorphic in angios perms, despite the occurrence of the successive type in the putative first‐branching extant angiosperm, Amborella, which contradicts earlier views on the evolutionary polarity of this character.

A mborella – Bearing Witness to the Past?

While Amborella likely retained some ancestral traits, critical character reconstructions have also highlighted some derived and sometimes unique characters in this species.

Specialized structures in the leaf epidermis of basal angiosperms: morphology, distribution, and homology.

The morphology of specialized structures in the leaf epidermis of 32 species of basal angiosperms, representing all seven families and 11 of 14 genera, was investigated using light and scanning electron microscopy.

Embryology of Amborella (Amborellaceae): Descriptions and Polarity of Character States

Comparisons with two other basal angiosperms (Nymphaeaceae and Illiciales) showed that most of the embryological features of Amborella are plesiomorphies, and contrary to all previous descriptions,Amborella has hemianatropous, rather than anatropous or orthotropic, ovules.

First South American Record of Winteroxylon, Eocene of Laguna del Hunco (Chubut, Patagonia, Argentina): New Link to Australasia and Malesia

Premise of research. Winteraceae, a family within the Canellales, is composed of tropical trees and shrubs broadly distributed in the Southern Hemisphere. The family is found today in eastern

Spontaneous emission of volatiles from the male flowers of the early-branching angiosperm Amborella trichopoda

Volatile emissions were detected for the first time in male flowers of the early-branching angiosperm Amborella trichopoda, suggesting a defensive and attractive double role of these compounds.

An early record of a vesselless angiosperm from the middle Cenomanian of the Envigne valley (Vienne, Western France)

Thousands of silicified wood fragments were recently collected from the middle Cenomanian of Vienne in western France at less than 10 km away from a historical locality where in 1870 the French

Tanispermum, a new genus of hemi-orthotropous to hemi-anatropous angiosperm seeds from the Early Cretaceous of eastern North America.

The discovery of a new genus, Tanispermum, highlights the extent to which the morphology of extant angiosperms is not representative of the diversity that once existed among early-diverging members of the group.

The morphophysiological dormancy in Amborella trichopoda seeds is a pleisiomorphic trait in angiosperms

Maximum parsimony analyses indicate that morphophysiological dormancy is likely to be a pleisiomorphic trait in flowering plants, and the significance of this conclusion for studies of early angiosperm evolution is discussed.