Clapham, A.R., Tutin, T.G. & Warburg, E.F. (Roles, S.J. del), 1957
Flora of the British Isles: Illustrations
Four volumes containing 1910 lines drawings of plants by Sybil Roles, arranged four to a page. It was published from 1957 to 1965, to accompany the "Flora of the British Isles" by the same authors.