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Synopsis The state has been explored intensively by the authors for plant wealth during last 14 years. A total of about 2500 species of angiosperms occur in the state. Bentham and Hooker's system of classification has been followed in the enumeration of families with certain exceptions to accommodate recent changes. A dichotomous indented key is given for families, genera and species. Under each family key to the genera followed by the genus with its authority, key to the species followed by species enumeration is given. The enumeration of species includes the complete citation according to ICBN, basionym, synonyms, followed by brief description, distribution in the state, flowering and fruiting period, vernacular name and specimens examined. References, index to families, genera and species are given at the end. Andhra Pradesh, One of the 25 States of India is located between 120 37' and 190 54' and 760 46' and 840 46E and occupies an area of about 2,70,916 sq/Km. It has a coast line of about 968 Km. The state is endowed with a variety of vegetation types ranging from the littoral mangroves and sand dunes to mountain forests of Eastern Ghats with an elevation of 1500m above MSL. The vegetation varies from semi-evergreen forests to Scrub jungles. Nearly 2531 species under 700 genera and 125 families have been enumerated with brief description. Under each family key to the genera followed by the genus with its authority, key to the species followed by the species enumeration is given. The enumeration of species includes the complete citation according to ICBN, basionym, synonyms, followed by brief description, distribution in the state, flowering and fruiting period, vernacular name and specimens examined. Reference, Index to families, genera and species are given at the end.