PLATES IN BLACK-AND-WHITE 



PACK 



MOUNTAIN VEGETATION .......... 5 



REED SWAMP AT THE MARGIN OF A NORFOLK BROAD - ... 63 



A TYPICAL FLOATING-LEAF ASSOCIATION 73 



WHITE WATER LILY (Castalia alba, Wood) WITH WATER BUTTERCUP - 73 



GREAT YELLOW WATER CRESS (Radicula amphibia, Druce) 79 



DUCKWEED (Lemna minor, L.)- - - - - - - - - 147 



ARROW-HEAD {Sagittaria sagittifolia, L.) - - - - - - - 153 



xi 



