DAVID T. CoxoN*, TIMOTHY M. O'NEILL', JOHN W. MANSFIELDt and ALEXANDER EA PORTER~ *Agricultural Research Council, Food Research Institute, Colney Lane, Norwich, NR4 7UA, UK; Departments of tBiology and ~Chemistry, The University, Stifling, FK9 4LA, UK ... Key Wm'd Index--Narcissus pseudonarcissus; Amaryllidaceae; daffodil bulbs; phytoalexins; hydroxyflavans; Botrytis cinerea. ... Abstract--Three 'phytoalexins were isolated from ...