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

The ecogroup classification based on the growth-form of plants (Eco-Plant model) is widely
used for extant, Cenozoic, Mesozoic, and Paleozoic paleoenvironmental reconstructions …

This study provides pollen data for 38 representative taxa belonging to all nine genera in the
current classification of the tribe Spiraeeae (Rosaceae) including the monotypic Korean …

Ceratostigma willmottianum (Plumbaginaceae) is a perennial herb native to China. Many
species of Plumbaginaceae have been reported to exhibit heterostyly. Determining the …

Despite that there are only three morphologically isolated genera of Gnetales (gymnosperm)
plants surviving today, they are thought to have had a major peak in diversity during the …

Dispersed pollen grains of Lagenella martini from the Upper Triassic of Austria were studied
by means of light, scanning and transmission electron microscopy. Pollen grains are …

Dispersed pollen grains Wodehouseia spinata Stanley of unknown botanical affinity from the
Maastrichtian of the Amur River Region, Far East are studied using transmitted light …

Ephedra (Gnetales) is a gymnosperm genus with a long evolutionary history; the first
dispersed pollen grains with affinity to the group are nown already from the Permian. This …

The morphological plasticity that can occur in pollen of Gnetum due to harmomegathy
demands a comparative overview of pollen characters in Gnetum when studying …

The exine ultrastructure of Dinophyton spinosum (Upper Triassic, USA), Preflosella
nathania, and Alisporites alimentosus (Lower Cretaceous, Russia) has been studied. Pollen …