This document discusses potatoes. It provides the botanical name of potatoes as Solanum tuberosum and states that the top potato producing states in India are Himachal Pradesh, Punjab, Haryana, Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Rajasthan, Gujarat, Orisa, West Bengal, Maharashtra, Karnataka, Uttaranchal, Andhra Pradesh, and Tamil Nadu. It also classifies potato varieties into four groups: early, mid, late, and processing, and provides examples of varieties in each group.