Once upon a time on Earth, there was a first flower. Nature provides plenty of cues to help us imagine what the planet looked like 250 million years ago. But we lack concrete evidence in order to ...

Pereskia duiz-romeroana and its putative relatives are scandent plants with vigorously growing long shoots, small flowers and fruits, and tuberous root systems. Except for size, floral development ...

This is a preview. Log in through your library . Abstract The structure of the floral nectaries of Cornus alba was studied using light microscopy as well as scanning and transmission electron ...