This book enumerates and analyses the Arabic plant names gathered by Peter Forsskål during the Royal Danish expediton to Egypt, the Red Sea and Yemen i 1761-1767. Forsskål gathered more than 2000 botanical specimens. In 1994 Professor Ib Friis and F. Nigel Hepper published The Plants of Pehr Forsskål's Flora Aegyptiaco-Arabica, a book containing a survey of the Herbarium Forsskalii and a revision of Forsskål's posthumous work, Flora Aegyptiaco-Arabica. This present book aims at supplementing Friis' and Hepper's work with a philological study of the Arabic plant names gathered during the expedition. Forsskål had scrupulously fulfilled his task of noting the local names, and his notes represent a unique material regarding Arabic botanical linguistics, as it can be closely connected to herbarium specimens.