By Grime, J. Philip, J. Philip Grime
By W. D. P. Stewart
By Marjorie Blamey
By Agriculture, Fish.& Food, Min.of
By Noel Kingsbury, Andrea Jones
By John Godley Kilbracken
By G. M. Clarke, R.E. Kempson
By William Adams, Richard Gibbs (New Zealand Turf Culture Institute)
By Natural History Museum
By Royal Botanic Gardens, Kew
By Wilfrid Blunt
By Maggie Campbell-Culver
By Kariem El-Boghdadly
By Jen Green
By S.T. Trudgill