The term "genus Bennettitis" can be broken down into two parts for better understanding:
So, "genus Bennettitis" is a scientific term used to describe a specific group of ancient plants that are part of a bigger category of plants known as bennettitales.
In more advanced discussions, you might encounter terms like taxonomy (the science of classification) or phylogeny (the study of the evolutionary history of organisms) while talking about genus Bennettitis.