is a specific kind of: flower.

is a broader term that covers: common four-o'clock, marvel-of-Peru, Mirabilis jalapa, Mirabilis uniflora | California four o'clock, Mirabilis californica, Mirabilis laevis | maravilla, Mirabilis longiflora, sweet four o'clock | Colorado four o'clock, desert four o'clock, maravilla, Mirabilis multiflora | Mirabilis oblongifolia, mountain four o'clock.

is a member of: genus Mirabilis, Mirabilis.