The term "blood red begonia" refers to a type of flowering plant that features striking crimson hues. There are several synonyms that can be used to describe this particular shade of red, including carmine, scarlet, ruby, and vermilion. Each of these adjectives brings a slightly different connotation to the description of the flower's color, from the deep, intense red of carmine to the bright, vivid tones of vermilion. Regardless of the specific term chosen, the blood red begonia is sure to catch the eye and add a pop of color to any garden or floral arrangement.