Flora of Scottish Lakes. 
143 
1909-10.] 
The plants more or less common to this and the last-mentioned loch are 
as follows : — Littorella lacustris, Lobelia Dortmanna, Elatine hexandra, 
Nitella opaca, Chara fragilis, var. delicatula, Juncus fluitans, Myriophyllum 
alterniflorum, Apinm inundatum, Fontinalis antipyretica, Callitriche stag- 
nalis, aquatic and terrestrial forms ; C. hamulata, Ranunculus Drouetii, 
Potamogeton natans, P. polygonifolius, P. obtusifolius, P. rufescens, P. Zizii, 
P. crispus, P. lucens, Castalia speciosa, Nymphsea lutea, Equisetum limosum, 
Phragmites communis, Sparganium natans, S. simplex, S. ramosum, Carex 
rostrata, C. filiformis, C. Goodenovii, C. flava, Polygonum ampliibium, P. 
aviculare, Iris Pseud-acorus, Alisma Plantago, A. ranunculoides, Juncus 
acutiflorus, J. lamprocarpus, J. effusus, J. bufonius, J. conglomeratus, 
Comarum palustre, Ranunculus Flammula, Mentha aquatica, M. sativa, M. 
arvensis, Lythrum Salicaria, Myosotis palustris, Triglochin palustre, Epilo- 
bium palustre, Senecio aquaticus, Caltha palustris, Viola palustris, Veronica 
Beccabunga, Pedicularis palustris, P. sylvatica, Galium palustre, Carum 
verticillatum, Eriophorum polystachion, Hydrocotyle vulgaris, Stellaria 
uliginosa, Gnaphalium uliginosum, Sphagnum sp., and a few of the common 
marsh mosses. 
White Loch is about 1 mile long by ^ mile broad, with a maximum 
depth of 38 feet, and is one of the largest of a group situated about 
3 miles east of Stranraer. This and the adjoining Black Loch are 
within the private grounds of Castle-Kennedy, the seat of the Earl of Stair, 
and are ornamental waters to Lochinch Castle. Although left as far as 
possible in a natural condition, these lakes are surrounded by lawns or 
meadows, which are furnished with groups of decorative trees ; there are 
also wooded islands (figs. 71 and 72). There is no extent of shore anywhere 
about White Loch, neither is there any considerable development of marsh 
vegetation, but here and there narrow zones of marsh plants, 1 to 10 feet 
wide, intervene between the water and the grassy banks. The water, which 
has the same elevation above sea level as that of Black Loch, viz. 54 feet, is 
not peaty, but is so turbid and greenish-coloured that the bottom cannot be 
seen at a greater depth than 18 inches when looking over the side of a boat 
(i.e. in August). Plankton organisms are the cause of this turbidity, more 
especially the diatom Melosira granulata. There is neither affluent nor 
effluent to this loch save a shallow boat-canal connecting it with the 
adjoining Black Loch, the water of which is dark and peaty (presumably 
these facts guided the nomenclator of the lochs). The water is therefore 
more or less stagnant, a condition favouring the increase of certain plankton 
organisms. A feature of both this and Black Loch is the narrow border 
of Heleocharis palustris that prevails nearly everywhere, growing luxuri- 
