The Northwest European Pollen Flora

21. Dipsacaceae by G.C.S. Clarke and M.R.L. Jones (London, UK). 22. Alismataceae by W. Punt and J.W. Reumer (Utrecht, The Netherlands). 23. Dioscoreaceae by G.C.S. Clarke and M.R.L. Jones (London, UK). 24. Cabombaceae by G.C.S. Clarke and M.R.L. Jones (London, UK). 25. Nymphaeaceae by G.C.S. Clarke and M.R.L. Jones (London, UK). 26. Aquifoliaceae by W. Punt and M.B. Schmitz (Utrecht, The Netherlands). 27. Linaceae by W. Punt and P. den Breejen (Utrecht, The Netherlands). 28. Convolvulaceae by Q.C.B. Cronk (Cambridge, UK) and G.C.S. Clarke (London, UK).