Bachelor of Science in Botany, Zoology, Chemistry, V R College, Nellore, 1984. Master of Science in Botany, Sri Krishnadevaraya University, Anantapur, 1986. Doctor of Philosophy in Plant Taxonomy, Sri Krishnadevaraya University, Anantapur, 1990.
Assistant professor S. K. University, 1992—2002, associate professor, 2002—2009, professor, since 2009, head department botany, 2005—2008. National Service Scheme programme officer Science Wing, 2000—2003. Cultural coordinator Sri Krishnadevaraya University, 2003—2005, landscape officer Anantapur, since 2009.
Trainer National Research Service Award, Hyderabad, 1994—1995, IIRS, Dehra Dun, 1996, NIAS, Bangalore, 1998, NBRI, Lucknow, 2000, NISCAIR Council for Scientific and Industrial Research, New Delhi, 2002. Member Indian Subcontinent Plant Specialist Group, Species Survival Commission, International Union Conservation Nature, 2009. Visiting fellow Oklahoma State University, Stillwater, 2009.
Expert member Dialectical Behaviour Therapy-Biotechnol., 2007, FRI-MoEF, Phytodiversity Network India, 2007. Coordinator MoEF-NBSAP Southern Andhra Pradesh, 2001—2002.
Member of East Himalayan Society Spermatophyte Taxonomy (life), Society Ethnobotanists (life), Indian Science Congress Association (life), Indian Botanical Society (life), Indian Association Angiosperm Taxonomy (life).
Married Veenadhari Rao. Children: Divya, Krishna Sai.