1. Antiquated Era: During antiquated times, humans employed the utilization of flora due to their curative attributes. As an illustration, the Sumerians residing in the vicinity of Mesopotamia employed plants such as the opium poppy for alleviating pain.

2. Medieval Epoch (476 BCE to 1453 CE): Throughout the medieval epoch, knowledge concerning medicinal plants disseminated to Europe, profoundly influencing the advancement of medical practices. This particular era is frequently denoted as the "Era of Herbalists."

3. Age of Exploration (15th and 16th Centuries): Amidst the Age of Exploration, geographical revelations led to the identification of novel medicinal plants and their therapeutic applications. Plants like Cinchona, renowned for producing quinine, were uncovered during this specific period.

4. Contemporary Epoch: In the contemporary epoch, scientific exploration has persistently investigated the medicinal attributes of plants. This scientific inquiry has fostered an enhanced comprehension of the chemical compounds present in plants and the production of herbal remedies.

Medicinal plants have not merely served as fundamental remedies throughout human history, but they also persist as significant entities in present times. These plants are employed not only as primary medications, but also as natural and efficacious supplements. Additionally, these plants find applications in the realms of food, cosmetics, and healthcare industries.