When you look at a patch of flowers, you often see clusters of colour. Even when a single species can have many different colours, you get patches. Why? How does a plant know to grow with this colour and not that colour...
Eurasian bee orchids (Ophrys, Orchidaceae) have become the most popular model system for studying reproduction via insect-mediated pseudo-copulation and for exploring the consequent, putatively adaptive, evolutionary...
Christenhusz and Chase highlight which fern groups/genera have taxonomic issues that remain to be clarified, and propose the use of broader family concepts.
Results suggest that opposing individual-level/species-level selection pressures have driven evolution of pollinator-restrictive traits in bifid toadflaxes.