Krishna district which derives its name from the famous river Krishna, is one of the nine districts of Coastal Andhra Pradesh and harbours a rich and varied flora. A total of 805 species of angiosperms and Pteridophytes belonging to 479 genera and 128 families have been enumerated. Introduction, past and present work on the flora of the district, general vegetation types, floristic analysis and artificial key to families are provided in the first part. The second part includes systematic enumeration.