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Bd. EV: ı2) THE VEGETATION IN SOUTH GEORGIA. 31 
looks different. This part of the mountain is shown on Pl. 2. The tussock forms 
irregular tongues and patches; their upper limit declines as we advance up the 
valley, and finally they cease altogether. There is much loose material — avoided 
by the grass — on the slope, and falls of rock occur at intervals. Various vascular 
plants reach a height of at least 250 m, but even at a height of 50—100 m they are 
seen in scattered specimens, or forming small patches, but not a close cover; here 
and there a tuft of Festwca erecta, a Phleum alpinum, an Aira antarctica or Poly- 
stichum mohrioides var. plicatum, or even a small colony of Acaena, mostly A. te- 
nera, as usual accompanied by Tortula robusta. 
From 100—120 m the Andreaea-tundra puts its stamp on the slope, growing 
in smaller or larger communities according to the ground; the genus next in im- 
portance to Andreaea is Rhacomitrium. 
Andreaea parallela Rhacomitrium austrogeorgicum 
» pumila » heterostichoides 
» Willi » pachydictyon 
Bartramia pycnocolea Tortula pycnophylla 
Dicranoweisia subinclinata 
Psilopilum antarcticum Chiloscyphus köppensis f. 
Lophocolea agopardana. 
On the ridge, which is very much exposed to the wind, there is a moss- and 
lichen-tundra. The higher plants are scarce. In crevices and on the narrow shelves 
towards the sea, I noted at a height of 230—250 m: Acaena adscendens and tenera, 
Colobanthus subulatus, Galium antarcticum, Hymenophyllum falklandicum and 
Polystichum mohrioides var. plicatum; there were also some 2—3 dm high plants 
of Poa flabellata and small patches of Festuca erecta with Phleum alpinum. 
Andreaea pumila Pogonatum alpinum x. austrogeorgi- 
Conostomum australe cum 
Dicranoweisia subinclinata Rhacomitrium austrogeorgicum 
Ditrichum hyalinocuspidatum 
Grimmia Nordenskjöldiü Lophozia propagulifera. 
Amongst the mosses: 
Cladonia subsguamosa Stereocaulon alpinum. 
On the rocks: 
Placodium elegans Neuropogon melaxanthum 
Rhizocarpon geographicum. 
