Medicinal plants are science.
Foxglove is Digitalis purpurea and is the plant from which some cardiac glycosides such as digitoxin and digoxin are derived.
Roses that change color are Science. Mutabilis is a rose from prior to 1894 (about the same age as our house). It opens a peachy yellow, changes each day, first to a light pink and then to a dark pink. The change is caused by sunlight acting on the pigments. The fragrance changes daily too.