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 …

Summary 1 In aggregate, past discussions of heterospory and its role in the alternation of
generations are riddled with ambiguities that reflect overlap of terms and concepts …

It has been 10 years since publication of the first edition ofSoils of the Past. In that time the
subject of paleopedology hasgrown rapidly, and established itself within the mainstream …

The appearance of photosynthetic eukaryotes (algae and plants) dramatically altered the
Earth's ecosystem, making possible all vertebrate life on land, including humans. Dating …

The Devonian Period was characterized by major changes in both the terrestrial biosphere,
eg the evolution of trees and seed plants and the appearance of multi–storied forests, and in …

There have been at least ten English-language textbooks of palaeobotany since DH Scott
published the first edition of Studies inFossilBotany in 1900. Most have been written by …

The divergence between monocots and dicots represents a major event in higher plant
evolution, yet the date of its occurrence remains unknown because of the scarcity of relevant …

Evolutionary developments among vascular land plants may have been the ultimate cause
for oceanic anoxic events, biotic crises, global climate change, and geochemical and …

Principles of phylogenetic analysis (cladistics) are introduced with an examination of
relationships among extant genera of Gnetales. The Gnetales can be supported as a …

Early Triassic coals are unknown, and Middle Triassic coals are rare and thin. The Early
Triassic coal gap began with extinction of peat-forming plants at the end of the Permian (ca …