This is the study of plants, including flowers and fruits, to know what types will grow together. You also know the lifespan and season of many different varieties. You understand and can identify the various plants in a given habitat. At higher levels, you have also studied fungi, moss, and subterrenean plantlife.
Botany can have a greater scientific approach by combining with Chemistry. Your concoctions are medicinal or poisonous in nature. At the lower levels, you at least know what's edible and what's dangerous in familiar areas.