1909-10.] Flora of Scottish Lakes. 81 



occur naturally in wet places about the shores of lakes. Many other 

 species and genera occur, especially about the lowland lakes, but 

 mostl}^ on drier ground. These and the damp-loving species of 

 Salix, Populus, etc., that are found, generally bear evidence of 

 having been planted for ornamental or other purposes. 



HYDROCHARIDACEiE. 



Anacharis Alsinastrum, Bah. { = Elodea canadensis, Michx.). YII. 

 Particularly abundant in Loch Leven, but less so than formerly on 

 account of the raids made against it by the angling authorities 

 [VI. Monreith Loch.— J. M'A.]. 



IRIDACE^. 



Iris Pseud-acorus, L. " I., II., III.," Y., YL, YII. Frequent, often 

 overgrowing a considerable patch of littoral marsh, but rarely seen 

 at the hill lochs (figs. 97 and 102). 



ALISMACE^. 



Alisma Plantago, L. ( = A. Plantago-aquatica, L.). "I., II.," Y., YL, 

 YII. Abundant in many places. A curious submersed form occurs at 

 Loch Gelly (p. 161). 



Alisma ranunculoides, L. " III.," lY., Y., YL, YII. Widely distri- 

 buted, but seldom abundant. Dwarf forms about 1^ inches high 

 occur on the exposed sandy shores of Loch Leven and other places. 

 An entirely submersed form about 3 inches high, with quite 

 subulate leaves, is occasionally found, and is abundant at Loch 

 Corsock. There it flowers under water to a depth of 3 feet ; 

 without the flower-stalk these submersed forms look extremely like 

 Isoetes lacustris. 



JUNCAGINACE^. 



Triglochin palustre, L. " I., II.," lY., YL Scarce, and sporadically 

 scattered about the shores of lochs. 



MELANTHACE^. 



Narthecium ossifragum, Huds. " I.," lY., Y., YL On peaty shores, but 

 seldom abundant. 



JUNCACE^. 



Juncus effusus, L. " I., II., IIL," lY., Y., YL, VII. Abundant every- 

 where, and often covering large areas of ground (figs. 66, 75, 79, etc.). 

 VOL. XXX. 6 



