KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 3- 



117 



Andrccea lanceolata 

 Bartramia pseudorobusta Card. 

 u. sp. 



Brachythecium subpilosum 

 Conostomum australe 

 Dicranum nigricaule 



Dicranum pumilum 

 Polytrichadélphus magellanicus 

 Ehacomitrium striatipilum 



Balantiopsis latifoliu 

 Jamesoniella colorata 

 Leioscyphus abditus 



LeioscypJms schismoides 

 Lcpidoziu falklandica 

 Lophocolea bisetula 



Schistochila lanceolata 

 Symplnjogyna crassifrons 

 Tylimanthus homomallus. 



The fresli-water vegetation. 



A. The ponds. 



From my first voyage to the Falklands I returned with the impression, that 

 the fresh-water flora is extremely poor. The explanation of my having formed this 

 opinion lies in the fact that I had seen only the eastern part of E. F,, and only 

 after my visit to Lafonia, did I realise that the aquatic plants are not at all so 

 few as I was inclined to believe. It is obvious that the conditions in Lafonia must 

 be more favourable and I have attributed this to the different geological structure 

 of that part. In the ponds of the Devonian zone, the bottom is either peat or a 

 sterile quartz-sand, sometimes very pure indeed, while in Lafonia the slates give rise 

 to a miiddy clay certainly more rich in nourishment. There is hardly anything that 

 deserves the name of a lake, but small lagoons and ponds are not nncommon ; they 

 are all very shallovv. 



Near Port Stanley, I observed by the edge of small ponds with a bottom 

 of sandy clay Crantzia lineata. Gunnera magellanica, Poa sp. and Ranunculus trulli- 

 folius (near Port Harriet), and in the water Myriophyllum elatinoides seems to be 

 common. Furthermore, Birger noted Crantzia lineata and Ranunculus ccespitosus. 

 The difference between these places and the muddy ponds described below is con- 

 siderable. 



16. Small pond between Arrow Harbour House and Victoria Creek, Lafonia. 

 On the härd clay (dried up on the occasion of oiir visit) a marginal zone of 

 Pm^m-association. 



Soc. Pratia repens 

 Cop. Colobanthus crassifoliits 

 Sagina procumhens 



Scirpus cernuus 

 Slåars. Galium antarcticum 

 Hydrocotyle hirta 



MyriopJiyllum elatinoides (dwarf 

 terrestrial form). 



Outside this a ± submerged zone: Plantago-maritima-a,ssocia,tion 



Greg. Plantag o maritima 

 Cop. Crantzia lineata Spårs. 



Hydrocotyle hirta 



Myriophyllam elatinoides 

 Air a antar ctica 

 Heleocharis melanostachys 



Liinosella aquatica 

 Litorclla australis 

 Ranunculus hydrophilus. 



Bryophytes: Anthoceros sp., Jamesoniella maluina, Leioscyphus grandistipus. 

 Outside this belt: MyriopJiyllum elatinoides-a^^socmtion, pure. 



