No. Flower can be a verb or a noun. It can be used as a noun adjunct (like an adjective) in terms such as flower garden and flower petals.
No, it isn't.
No, it is not. It is a noun, a type of flowering plant.
Yes, it is a monocotyledonous flowering plant
corn is a flowering monocotyledonous plant
Flowering.
No, it is a flowering plant
It is a flowering plant.
flowering
You get both flowering plants and non-flowering plants; non-flowering are things like mosses, ferns and liverworts which produce spore, flowering plants produce seeds
flowering plant
corn is a flowering monocotyledonous plant
Ixora is a flowering plant
Dieffenbachia is a flowering dicotyledonous plant