1 909 -10. J Flora of Scottish Lakes. 89 



CHARACE^:. 



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, A(j. "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. " IL, 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 ./. G., being the most usual, but var. 

 capillata, Braun., is abundant in Area VII. 



Chara fragihs, 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 



