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The beginning of medicinal uses of plants dates back to the scribing period of Vedas in India. In ancient days, such uses came into vogue due to accidental experimentation or observation which subsequently gave rise to practice either by a qualified physician or by an astrologer or by lay men, called nostrum or folk-lore. All these have their own distinct manner of use though they are very often intermingled. Apart from classical uses as mentioned in Ayurvedic, Unani or Sidha therapeutic treatises, material medica, texts on / pharmacy etc.; the new dimension of collecting additional information started in early part of 20th century where on several botanists contributed a lot for exploration of the same.