A SURVF.V OF THE r.fiWKR I'l'.Ii'.S MAUSMES II5 



Myosotis caespitosa o C. distans iir 



Glaux maritima la Alopecurus geniculatus 



Triglochin palustre f Glyceria fluitans f 



T. maritimum vr Festuca rubra f 



Juncus bufonius r Fontinalis antipyretica. 



J. supinus r 



Independent of the main zone system, a somewhat different 

 association occupies a small arm sent off southward just where 

 the Fleet is contained by the earth wall. This is dominated 

 by a mass of Scirpus maiifimus, which yields in deeper water 

 to Glyceria continuous with that lining the Fleet. The Reed- 

 swamp here is of different composition and comprises one 

 plant especially making it worthy of mention ; that plant is 

 Potaniogetou coinpressus : — 



Glyceria aquatica a/ Lemna minor a 



Scirpus maritimus ai L. trisulca / 



Myosotis palustris / Alisma plantago-aquatica ... -^ 



Callitriche spp a Potomageton compressus ... / 



Myriophyllum spicatum a Glyceria fluitans o 



As the Fleet penetrates more remotely into the "Marsh," it 

 breaks into stells, some broad and deep, others shallow and 

 often dry, and still others with a mud bank in the centre. 



Those perpetually supplied with water are far from uniform 

 in the vegetation they support, but an example, specially 

 selected for study, possessed a dense central column of 

 Eleocharis palustris of an exceptionally luxuriant form, behind 

 which stretched on both sides a band of Glyceria aquatica two 

 yards wide ; succeeding this was vegetation approximating 

 that in the transition zone to the rear of the Reedswamp. 

 Toward the Fleet, the Eleocharis merged into the pure growths 

 oi Sci?p2is maritimus \^\\\Qk\ 2^\.Q.xn2j{.^ with the Glyceria there. 

 Very rarely, Sciipus Tabernaeinoiitani plays the part of 

 Eleocharis, and then the association is of a characteristically 

 open type. 



Passing away from their confluence with the Fleet, the 

 stells, deep and shallow alike, meander in an aimless path 

 across the broad open expanse until, often enough, all the 



