Peas have been found has far back as 2000BC in what is now modern day India, Pakistan and Afghanistan. I Egypt back to 4800BC. They most commonly refer to the small seed from the pod fruit Pisum sativum. Peas can be green or yellow. Botanically they are actually a fruit. Sometimes the term pea is confusingly used to describe other unrelated species like cowpeas (Vigna unguiculata) and chickpeas.