Covering: up to the end of March 2012 Stilbenoids, a family of polyphenols known for the
complexity of their structure and for their diverse biological activities, occur with a limited but …

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

Ephedroid macrofossils have been widely documented in Cretaceous deposits, including
numerous from the Lower Cretaceous Yixian Formation of NE China. However, few …

Premise of research. The recognition of diverse and abundant chlamydospermous seeds
from the Early Cretaceous of Denmark, Portugal, and eastern North America has been an …

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 …

Bracts of female cones of extant gymnosperm Ephedra (Joint fir) are either colorful and
fleshy (section Ephedra), or dry-winged and membranous (section Alatae), or dry and …

Abstract The Cerro de Las Cabras Formation provides a great opportunity for advancing the
understanding of Middle Triassic paleoclimates and terrestrial ecosystems. Previous …

Bicatia gen. et sp. nov. from the Early Cretaceous of the Northern Hemisphere is described
based on three species of dispersed seeds: Bicatia costata from the Juncal and Famalicão …

This paper provides a description of the morphology and anatomy of a fertile fossil, related to
gnetalean lineage, which has been named Itajuba yansanae. A conclusion has been drawn …

New scanning electron microscope (SEM) and light microscope data and illustrations are
presented in order to compare hydraulic adaptations of non-gnetalean conifers and …