756 
VEGETATION SURVEY OF NORFOLK. 
Species common on acid 
peat but absent from fen. 
Drosera rotundifolia 
„ longifolia 
Erica tetralix 
Gentiana Pneumonanthe 
J uncus squarrosus 
Nardus stricta 
Lycopodium inundatum 
Sphagnum sp. 
Aulacomnium palustre 
Gymnocolea inflata 
Species common to both 
acid peat and fen. 
Parnassia palustris 
Salix repens 
J uncus effusus 
„ subnodulosus 
„ sylvaticus 
Eriophorum angustifolium 
Schoenus nigricans 
Deschampsia ccespitosa 
Hypnum scorpioides 
„ cuspidatum 
Aquatic vegetation other than that of the river banks, which 
consists of marsh species, offers little of special interest. 
Stagnant water in pits and ditches has Ranunculus aquatilis 
(aggr.), Lemna minor, L. trisulca, Potamogeton natans, 
Glyceria fluitans, and occasionally Hottonia palustris, 
Hydrocharis Morsus-rance, Elodea canadensis, Callitriche sp., 
Utricularia vulgaris, and U. minor. Sagittaria sagittifolia, 
Potamogeton crispus, P. densus, Zannichellia palustris, and 
Glyceria aquatica occur more or less abundantly in running 
water and ditches subjected to inundation. The only free 
floating or submerged bryophytes that have been detected are 
Ricciocarpus natans, Fontinalis antipyretica, Eurhynchium 
rusciforme, Hypnum riparium, Sphagnum contortum, and 
S. cuspidatum; the first was noted in clay pits at Weston 
and Newton Flotman in considerable quantity; the Sphagna 
are restricted to peaty waters. 
We are indebted to various landowners and occupiers who 
have given us access to their land for the purposes of this 
survey. 
