under Albert Seward, and was awarded the D.Sc. degree of the University of London in 1919. Career During his stint in England, Sahni joined Professor Seward to work on a Revision of Indian Gondwana plants (1920, Palaeontologica Indica). In 1919 he briefly worked in Munich with the German plant morphologist Karl Ritter von Goebel. In 1920 he married Savitri Suri, daughter of Sunder Das Suri an Inspector of Schools in Punjab. Savitri took an interest in his work and was a constant companion. Sahni returned to India and served as Professor of Botany at Banaras Hindu University, Varanasi and Punjab University for about a year. He was appointed the first Professor and Head of the Botany Department of the Lucknow University in 1921, a position he retained until his death. The University of Cambridge awarded him the degree of Sc. D. in 1929. In 1932 Palaeontologica Indica included his account of the Bennettitalean plant that he named Williamsonia sewardi, and another description of a new type of petrified wood, Homoxylon, bearing resemblance to the wood of a living homoxylous angiosperm, but from the Jurassic age. During the following years he not only continued his investigations but collected around him a group of devoted students from all parts of the country and built up a reputation for the University which soon became the first Center for botanical and palaeobotanical investigations in India. Sahni maintained close relations with researchers around the globe, being a friend of Chester A. Arnold, noted American paleobotanist who later served his year in residence from 1958–1959 at the institute. He was a founder of The Paleobotanical Society which established the Institute of Palaeobotany on 10 September 1946 which initially functioned in the Botany Department of Lucknow University but later moved to its present premises at 53 University Road, Lucknow in 1949. On 3 April 1949 the Prime Minister of India Jawaharlal Nehru laid the foundation stone of the new building of the Institute. A week later, on 10 April 1949, Sahni succumbed to a heart attack. Contributions Sahni worked on living plants species including Nephrolepsis, Niphobolus, Taxus, Psilotum, Tmesipteris and Acmopyle examining evolutionary trends and geographical distributions. His ability to apply theory to observations and make hypotheses based on observations were especially influential on his students. When examining wood remains from Harappa, he noted that they were of conifers and inferred that the people there must have