CORVALLIS, Ore. – A 100-million-year old piece of amber has been discovered which reveals the oldest evidence of sexual reproduction in a flowering plant – a cluster of 18 tiny flowers from ...

William E. Friedman, Sexual Reproduction in Ephedra nevadensis (Ephedraceae): Further Evidence of Double Fertilization in a Nonflowering Seed Plant, American Journal of Botany, Vol. 77, No. 12 (Dec., ...

In the flowering plant world, reproduction means an intricate succession of events. It begins when a pollen grain that carries the sperm cells lands on the top of the pistil, the female reproductive ...

The characteristics of flowers influence most aspects of angiosperm reproduction, including the agents of pollination and patterns of mating. Thus, a clear view of the forces that mediate floral ...

Scientists have discovered a 100-million-year-old chunk of amber that captures what they say is the oldest evidence of sexual reproduction in a flowering plant.

Scientists at the Salk Institute have discovered a genetic mechanism for how plants integrate light and temperature ...

Plants may be stuck in one place, but the world around them is constantly changing. In order to grow and flower at the right ...

Stomatal architecture-the number, form, and arrangement of specialized epidermal cells associated with stomatal guard cells-of 46 species of basal angiosperms representing all ANITA grade families and ...