Diana M. Miller is a horticultural botanist whose work with the Royal Horticultural Society (RHS) spans well over three decades, and for which she was awarded the RHS Associate of Honour. From 1979 she was Keeper of the RHS Herbarium, where she developed and maintained the world's only herbarium dedicated to cultivated plants. She also served as secretary for the Woody Plant Committee of the RHS and was a founding member and secretary of the Horticultural Taxonomy Group. Over the years she has written, edited and contributed to a range of horticultural publications, including The Garden magazine and is the author of Pelargoniums (Batsford Press, 1996). Diana holds a BSc in Botany from the University of Manchester and an MSc in Microbiology from Wellesley CollegeMiller, Diana M. is the author of 'Trees and Shrubs for Small Spaces: 400 Top-Performance Woody Plants', published 2008 under ISBN 9780881928754 and ISBN 0881928755.