Background Ovules as developmental precursors of seeds are organs of central importance
in angiosperm flowers and can be traced back in evolution to the earliest seed plants …

Progress toward understanding the dynamics of ancient plant-insect associations has
addressed major patterns in the ecology and evolution of herbivory and pollination. This …

Plants have utterly transformed the planet, but testing hypotheses of causality requires a
reliable time‐scale for plant evolution. While clock methods have been extensively …

The study of the Early Cretaceous terrestrial Jehol Biota, which provides a rare window for
reconstruction of a Lower Cretaceous terrestrial ecosystem, is reviewed with a focus on …

Growing worldwide, the genus Ephedra (family Ephedraceae) had a medicinal, ecological,
and economic value. The extraordinary morphological diversity suggests that Ephedra was …

Abstract Ephedra, Gnetum, and Welwitschia constitute the gymnosperm order Gnetales of
still unclear phylogenetic relationships within seed plants. Here we review progress over the …

In zoological nomenclature, to be potentially valid, nomenclatural novelties (ie, new nomina
and nomenclatural acts) need first to be made available, that is, published in works …

A lineage of 12 arid land shrubby species in the gymnosperm genus Ephedra (Gnetales)
from North America is used to evaluate the influence of climate on speciation. With a long …

The Gnetales are one of the most fascinating groups within seed plants. Although the advent
of molecular phylogenetics has generated some confidence in their phylogenetic placement …

Abstract Morphological variation in Ephedra (Gnetales) is limited and confusing from an
evolutionary perspective, with parallelisms and intraspecific variation. However, recent …