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 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 …

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 …

Abstract Knowledge of relationships among plants has improved dramatically but for many
groups, it still rests solely on information from the plastid genome. Consequently, only parts …

Archangelskyoxylon carlquistii gen. et sp. nov. is based on anatomical secondary xylem
from the Lower Jurassic (Sinemurian–Toarcian) in the Roca Blanca Formation of Santa Cruz …

Regularity and periodicity in the arrangements of organs in all groups of land plants raise
questions about the mechanisms underlying phyllotactic pattern formation. The initiation of …

An extraordinarily well-preserved autochthonous angiosperm herbaceous community is
described from the Lower Cretaceous deposits of the Frentsevka Formation, southern …

Macrofossil evidence has demonstrated a first radiation of gnetophytes in the Early
Cretaceous. However, the origin of the diversity of gnetophytes remains ambiguous because …

In the present paper, an ephedroid macrofossil species from the Early Cretaceous Yixian
Formation of western Liaoning of China is described as new to science: Ephedra multinervia …

Abstract The Early Cretaceous Yixian Formation from western Liaoning in northeastern
China is well known for its extremely high diversity of plant macrofossils including important …