There is no widely recognized plant or flower specifically called "Roger." However, many plants and flowers have common names that can vary by region, so it's possible that "Roger" could be a local or colloquial name for a specific species. If you have a specific plant in mind, providing more details could help clarify.
Roger Flower died in 1427.
There is an Umbrella Plant - Schefflera arboricola
Flower might be called the "Parent of a plant", because a flower produces seeds and seeds are required to continue the life cycle of a plant.
Linea
A flare Sepals of a flower are collectively called 'calyx'
Is there a plant called Valerie
pistil
yes
When pollen grains from the flower of same plant land on the stigma of same flower or other flowers of the same plant, it is called self-p0llinating of a plant.
A Flower called "Narcissus".
It is called the stem or stalk.
knotweed