CAREX FLAVA AND ITS ALLIES— I 



67 



Characters 



4. Female glumes 



5. Perigynia (Fig. 1) 



6. Nuts 



7. Periodicity 



C. serotina Merat 

 (Plate 5a) 



Pale yellow-brown 



(1-75-) 2-0-2-5 (-3-0) mm., straight, 

 yellow-green, more or less inflated; 

 beak 0-25-0-5 mm. 



Never completely filling the perigynia. 

 Flowers 6-8. Fruit 7-9. 



C. scandinavica E.W. Davies 

 (Plate 5b) 



Dark brown, with a pale or green 

 midrib. 



(1-0-) 1 •5-2-5 mm., straight, -^rey- 

 green, never inflated •/ beak 0*25 mm. 



Completely filling the perigynia. 

 Flowers 5-7. Fruit 6-8. 



Fig. 1. Perigynia : left, Carex serotina; right, C. scandinavica. 



These two allied species have different distributions in the British Isles, and as can 

 be seen in the distribution map C. scandinavica appears to replace C. serotina in N.W. 

 Scotland. The map is based on data obtained from Nelmes (1947) and from specimens 

 seen in the field and from the following herbaria : Kew, Oxford, Cambridge University 

 College, Leicester and J. E. Lousley. The details of the localities and their vice-counties 

 not given by Nelmes are listed below. 



LOCALITIES IN THE BRITISH ISLES 

 C. SCANDINAVICA E. W. Davies 



V.c. 88. MID PERTH : Fearnan Pier, Loch Tay, 1952, E.W.D. 

 97. WESTERNESS: Arisaig, 1951, E.U^.D. 



104. N. EBUDES : shore at Drynoch, Skye, 1938, /. E. Lousley. 



105. W. ROSS : Loch Carron, 1952, E.W.D.; the mains, Loch Torridon, 1952, E.W.D. ; shore, Ob 



Mheallaidh, Shieldaig, Upper Loch Torridon, 1947, R. Mackechnie & E. C. Wallace. 

 108. W. SUTH.: Kylesku Ferry, 1952, E.W.D. 



no. OUTER HEBRIDES : Berie Sands, Uig, Lewis, 1946, E. F. Warburg; Meall Geal, Uig. Lewis, 



1946, E. F. Warburg. 

 112. ZETLAND : bog. Fair Isle, 1949, E. A. G. Duffey. 



C. SEROTINA Merat 



V.c. 4. N. DEVON : Braunton Burrows, 1952, E.W.D. 



6. N. SOM. : Shapwick Peat Moor, 1951, E.W.D. 



9. DORSET : Littlesea, 1951, E.W.D.; South Haven, Poole Harbour, 1937, E. C. Wallace. 



11. S. HANTS. : Hatchet Pond, Beaulieu, 1952, E.W.D.; Sowley Pond, J913, /. Comber. 



12. N. HANTS. : Fleet Pond, 1952, E.W.D. 



17. SURREY : Frensham Little Pond, 1952, E.W.D. 



23. OXON. : Port Meadow, Oxford, 1946, /. E. Lousley. 



26. W. SUFF. : Poor's Fen, Lakenheath, 1951, S. M.Walters. 



28. W. NORF. : Wretton Fen, 1925, /. E. Little; Shouldham Warren, 1919, /. E. Little; Derby 



Fen, 1951, E.W.D.; Leziate Fen, 1951, E.W.D. 



29. CAMBS. : Fulbourn Pond, 1951, E.W.D.; Wicken Fen, 1951, E.W.D. 

 31. HUNTS. : Vv^oodwalton Fen, 1909, G. C. Druce. 



33. E. GLOS. : South Cerney gravel pit, Cirencester, 1951, E.W.D. 



41. GLAM. : Kenfig, 1935, /. E. Lousley; Oxwich Burrows, 1948, /. E. Lomley; Port Talbot, 1903, 

 G. C. Druce, 



