74 Proceedings of the Royal Society of Edinburgh. [Sess. 



CRUCIFER^. 



Radicula officinahs, Groves ( = R. Nastiirtium-aquaticum, R. oAid B.). 



" II, III," V, VI, VII. Seldom abundant at the lakes. 

 Radicula palustris, Moench. V., VI., VII. Occurring sporadically 



about the shores of lowland lakes. 

 Radicula pinnata, Moench { — R. sylvestris, Druce). V. Distribution 



very restricted. 

 Cardamine pratensis, L. "I., II., Ill," IV., V., VI., VII. Almost 



ubiquitous, but genei'ally sparse. A form which multiplies vegeta- 



tively by buds, that arise from the base of the leaflets, occurs at 



Loch Gelly (p. 160). 

 Subularia aquatica, L. " I." A few plants occasionally observed. IV., 



v., VI. Often ver}^ abundant. 



VIOLACEiE. 



Viola palustris, L. " I., II., III." Only as scattered specimens upon the 

 shores of lakes. IV., V., VI., VII. Frequent in lowland situations. 



ELATINACE^. 



Elatine hexandra, DC. VI. Very abundant in some places. At Loch 

 Magillie and White Loch, Castle-Kennedy, for example, this plant 

 carpets the bottom in large patches from the margin to a depth of 

 6 feet. At other lochs it sometimes covers an exposed muddy 

 shore. When submersed the plants are of a delicate texture, pale 

 green, with elongated leaves, and seldom produce flowers. When 

 exposed on mud or sand they are much more robust, dark-reddish 

 green, with short leaves, and flower profusely. In the latter state 

 the specimens much resemble small examples of Peplis Portula in 

 both form and colour. 



CARYOPHYLLACE^. 



Sagina nodosa, Fenzl. VII. In matted growth on sandy or stony 



shores ; scarce. 

 Stellaria uliginosa, 3Iuo-r. "I., II., III.," IV., V., VI., VII. Widely 



distributed, but seldom abundant. 

 Stellaria palustris, Retz. V. Scarce. 



HYPERICACEiE. 



Hypericum humifusum, L. V. Wet sandy and gravelly shores, not 

 common, and usually a straggler from an adjoining heath. 



