186 THE b^RESH- WATER LOCHS OF SCOTLAND 
POLYTRICHACEiE 
Polytrichum commune, L. This common moorland moss is occa- 
sionally plentiful on peaty shores. 
Catharinea undulata, Weh. c^^ Moh?\ IV. A common moss, but 
it rarely occurs in any abundance at the lochs, it being a more 
or less terrestrial plant. At Loch Minnoch, however, submersed 
rocks were abundantly clothed with an aquatic form of it. 
DICRANACE^ 
Dichodontium pellucidum, Schp., IV., VI. Common on rocks of 
the shores of lochs in hilly districts. 
Blindia acuta, B. c^- S., I., IV., V., VII. On wet or submerged 
rocks ; common about the shores of hill lochs. 
Dicranella squarrosa, Schp., IV. Often abundant on the wet, 
boggy shores of hill lochs. D. heteromalla, Schp., is also 
frequent, but on drier ground. 
Dicranum fuscescens, Turn.^ IV. Rocks on the shores of hill 
lochs ; common. 
Dicranum Scottianum, Turn.^ IV. As above, but less common. 
FISSIDENTACEJ^ 
Fissidens adiantoides, Hediv.^ I., IV. Often abundant in wet 
places on rocky shores. 
GRIMMIACE^ 
Grimmia apocarpa, Hedw.^ IV., VI. Common on the dry parts 
of rocks about the shores. 
Grimmia apocarpa, Hedw.^ var. rivularis, Weh. Mohr^ IV., VI. 
Frequently abundant on wet and submersed rocks, occasionally 
down to 5 or 6 feet deep. In other areas it is scarce at the lochs. 
Rhacomitrium lanuginosum, Biid., IV. Often a conspicuous 
object in this area, upon the rocks of the shores. 
Rhacomitrium heterostichum, Brid.^ IV. Various forms of it are 
common in similar situations to the last. 
Rhacomitrium aciculare, Brid.^ I., IV., V., VII. Frequent upon 
wet and submersed rocks ; but sometimes only near the 
embouchures of burns. 
Rhacomitrium protensum, Braun.) IV. Sometimes abundant on 
wet rocks. When luxuriant, as at Loch Dungeon, it has a 
very pleasing appearance. 
Hedwigia ciliata, Elirh.^ IV. The type and the var. leucophaea, 
B. S.^ frequently cover the syenite rocks that abound upon 
the shores, or crop out of the water, as islands, in the lochs of 
this Area. 
