1909-10.] 
Flora of Scottish Lakes. 
89 
CHARACEiE. 
Messrs H. and J. Groves kindly named a number of difficult forms. 
On the whole, these plants are less abundant in Areas IV., V., and 
VI. than in the three former Areas, but they are very abundant in 
Area VII. 
Nitella opaca, Ag. “I.,” IV., V., VI., VII. Generally distributed in 
peaty lochs. I have never dredged it from a greater depth than 
about 16 feet in the present Areas, nor, indeed, have I found any 
of the more highly organised plants at a much greater depth in 
Areas IV- VII. Reasons for this will be given on subsequent pages. 
Nitella translucens, Ag. “ I.,” VI. Only observed in the Mochrum 
district. A very large form in a barren state extremely like N. 
translucens was referred by Messrs Groves to N. flexilis or N. 
opaca. It was abundant in Loch Ken and Woodhall Loch at 
depths of from 6 to 8 feet. 
Tolypella glomerata, Leonh. VII. In Loch Leven, but apparently 
very scarce. 
Chara aspera, Willd. “ II., III.,” V, VII. Sometimes slightly 
incrusted with lime, and frequently abundant in lowland non-peaty 
lochs, or in lochs that receive the drainage of villages. This plant 
sometimes grows in prodigious quantity, as in Loch Leven, where 
hundreds of acres of the bottom are covered by it. In that loch it 
occurs at depths of from 1 to 15 feet, but is most abundant at 
4 to 8 feet deep. Some of the varieties of this species are also 
common, and frequently grow with the type, vars. subinermis, Kuetz., 
and desmacantha, H. and J. G., being the most usual, but var. 
capillata, Braun., is abundant in Area VII. 
Chara fragilis, Desv. “I., II.,” IV., V., VI., VII. This species thrives in 
both peaty and non-peaty waters. In the former case it is usually 
free of lime, in the latter it is frequently more or less incrusted with 
that substance. The common form in peaty lochs is the var. 
delicatula, Braun. Both forms are occasionally very abundant. 
The var. fulcrata, Gant., occurs in Area VII. 
Chara vulgaris, L. VII. This does not appear to be a common plant 
in the lochs, but it occurs in Loch Leven as well as in some other 
lochs of Area VII. where the var. papillata, Wallr., also grows. 
Chara hispida, L., var. rudis, Braun. “II,” VII. Very plentiful in 
Lochmill Loch, where it is only slightly incrusted with lime. 
Chara contraria, Braun. IV., VII. Scarce in the first Area, but more 
