1909-10.] Flora of Scottish Lakes. 87 



about lowland lochs, and occasionally alDundant, as at Burntisland 

 Reservoir, where it overgrows areas of marshy ground ; at the same 

 loch stragglers may also be found in drier situations, even on the 

 adjacent roadside. The specimens from the last-mentioned site are 

 much dwarfed, and resemble the var. stictocarpa, Druce. 



Carex flacca, Schreb., var. stictocarpa, Druce. " III.," IV., V., YI., VII. 

 Scattered specimens are frequent, but it seldom occurs in abundance. 



Carex binervis, Sm. " I.," IV., VI. On boggy, peaty shores usually scarce. 



Carex filiformis, L.( = C. lasiocarpa, EhrJi.). " I.," IV., V., VI. Frequent 

 and abundant at the margins of alpine and sub-alpine lochs, where 

 it is sometimes the onl}'- dominant species of this genus (fig. 19). 



Carex hirta, L. VII. Not general about lochs, but it grows in abundance 

 on the exposed sandy shores of Loch Leven, where, in common with 

 several other plants, it assumes a dwarf habit, growing onl}' from 

 4 to 8 inches out of the sand. It grows there much after the 

 manner of Carex arenaria on the sandy seashore, and, like it, binds 

 the sand with its long scaly rhizomes. 



Carex rostrata, Stokes ( = 6'. inflata, Hiids.). "I., II., III.," IV., V., VI., 

 VII. Probably the most abundant and dominant plant of all. It 

 grows at the margins of both peaty and non-peatj^ lochs of any 

 elevation, from the shore out into water 1 or 2 feet deep (figs. 22, 

 48, 96, etc.). 



Carex vesicaria, L. " I.," IV. Occasionallj" very abundant ; at the 

 head of L. Ken, for example, there are large associations of it. 

 Frequently the beak of the nut is curiously looped within the 

 perigynium ; this results from the long style not being allowed to 

 pass out of the mouth of the perigynium as the nut develops. 



Carex acutiformis, EJirh. V. As a constituent of a loch flora I have 

 only observed this plant at Carlingwark Loch. 



GRAMINE^. 



Phalaris arundinacea, L. " I.," IV., V., VI., VII. Rather common at 

 loch margins, but principally about lowland lochs (fig. 71). 



Phragmites communis, Trin. " I., II., III., ' IV., V., VI., VII. A very 

 dominant and abundant species in lowland or highland, peaty or 

 non-peaty lochs. On the rich muddy shores of wind-sheltered lochs 

 it attains great luxuriance, often being 8 or 10 feet high in such 

 situations, and overgrowing large areas (figs. 44, 65, 90, 95, and p. 168). 



Deschampsia caispitosa, Beauv. " I.," IV., V., VI., VII. A very usual 

 member of the shore flora of lochs, but generally in small quantities. 



