PLATE 12 



Figure 1 shows a pollen grain mitosis and two of the three aborting nuclei, and Figs. 2-9 show meiosis in 

 the pollen mother cells. All photographs X 2,400. 



Fig. 1. Carex flava, Roudsea Wood, Lanes., n = 30. 



Fig. 2. C. flava, Malham Tarn Moss, Yorks., n = 30. 



Fig. 3. C. flava, Preda, Graubiinden, Switzerland, n = 30. 



Fig. 4. C. lepidocarpa subsp. lepidocarpa, Wicken Fen, Cambs., n =^ 34. 



Fig. 5. C. lepidocarpa subsp. scotica, Inchnadamph, Sutherland, n 34. 



Fig. 6. C. demissa. Loch Tummel, Perthshire, n = 35. 



Fig. 7. C. demissa, Furnols, Central France, n 35. 



Fig. H. C. serotina, calcareous marsh, Fulbourn, Cambs., n = 35. 



Fig. 9. C. serotina, salt marsh, Hokatorp, Sweden, n = 35. 



