Chrysanthemum flowers-, this plant boasts medicinal and culinary uses. Its flowers are enjoyed as a sweet drink in parts of Asia, the greens are boiled & served as a meal in China. The NASA study found chrysanthemums to be effective at removing benzene from the air. Benzene is found in inks, paints, plastic, dyes, detergents, gasoline, pharmaceuticals, and pesticides. The flowers last about six weeks and thrive in bright, indirect light.