L. Ryvarden, J.L. Harley, E.L. Harley,Editors, ,Supplement to new phytologist 105 (1987) Obtainable from the Executive Editor, The New Phytologist, Botany Department, The University, Sheffield S10 2TN, on receipt of a sterling cheque for £5.00 made payable to The New Phytologist Trust and an A4 envelope.