FLORA OF SCOTTISH LAKES 
181 
Cladium Mariscus, Br.^ VI. Very abundant about lochs in the 
Mochrum district. On Anabaghsh Moss several small lochans 
are entirely surrounded by it. 
Rhynchospora alba, Vahl^ IV., VI. Sometimes abundant on 
shores of boggy peat. A very common moorland plant in 
these Areas. 
Heleocharis palustris, Br.^ I., II., III., IV., V., VI., VII. Ubiquitous 
and variable, sometimes 3 feet high ; at other places, where 
exposed to wind, only a few inches high. One such dwarf 
form, with short, stout, very scaly rhizomes and few flowering 
stems, which were about 4 inches high, was overgrowing an 
exposed sandy shore at Loch Grennoch. On a sandbank at 
Loch Ness there was a form in which the rhizome had discarded 
the diageotropic habit and assumed negative geotropism in 
order that it might not be buried too deeply by the accumulat- 
ing sand. 
Heleocharis multicaulis, Sm.^ IV., V., VI. Sometimes abundant 
in the more or less peaty lochs ; leaves often floating on the 
surface, and occasionally viviparous at the extremities. 
Heleocharis acicularis, Sm.^ IV., VL, VIL Not a common plant, 
but occasionally abundant. It forms a sward on the wet 
sandy or muddy shores of lochs, and enters the water to a 
depth of about a foot ; sometimes, however, to a depth of 
3 or 4 feet, in which case the plants are much elongated. 
Scirpus fluitans, L., IV., VL Common in the peaty lochs of these 
Areas, and sometimes very abundant. 
Scirpus setaceus, Z., VII. On sandy shores ; scarce. 
Scirpus lacustris, L., I., II., III.', IV., V., VL, VII. W^idely 
distributed and abundant in either peaty or non-peaty lochs. 
I have seen the stems ] 4 feet long — 6 feet above the surface 
of water 8 feet deep. The long, linear, grass-like leaves I 
have only seen in water 3-8 feet deep. 
Eriophorum vaginatum, L., I., IV., VL, VII. Sometimes upon the 
peaty shores of hill lochs, particularly in Area L 
Eriophorum polystachion, L., L, II., IV., V., VL, VIL More 
frequent than the last-mentioned, especially upon the more 
or less peaty shores of lowland lakes ; less abundant in the 
mountains. 
Carex dioica, Z., 1. Shores of mountain lochs ; not common. 
Carex elata, J//., 1. A carpeting form with diageotropic rhizomes 
in wet places, and a caespitose form with negative geotropic 
rhizomes forming tussocks in water 2 or 3 feet deep. Inchna- 
cardoch Bay, Loch Ness. 
Carex disticha, Huds., VII. On sandy-muddy shores ; scarce at 
