The Scottish Naturalist. 351 



plants of this were barren, and had no floating leaves ; but in 

 a shallow part of the lake we found both fruit and floating 

 leaves. One of the commonest pond weeds was P. obtusifolius, 

 often two feet or more in length, and very graceful, with its 

 brown and green foliage. It was flowering and fruiting freely. 

 Much less common, and much resembling the last on a smaller 

 scale, was P. pusillus, also with plenty flowers and fruit. Still 

 rarer, and only found in a barren state, was P. crispus, with its 

 beautiful dark-green and crisped leaves. Though not seen 

 commonly in Loch Clunie, it is by no means a scarce Perth- 

 shire plant. In deeper water, but reaching the surface, and 

 growing in beds by itself, was P. perfoliatus, many feet in length. 

 It also was abundantly in fruit. Then, likewise fruiting freely, 

 and with long stems, was P. natans; while in another part of the 

 lake we found P. proelongus, growing in large beds in deepish 

 water. The upper leaves in many of the fruiting specimens 

 were shortly petioled, subcoriaceous, and almost floating, a 

 state of the plant of which I can find no mention. Finally, a 

 great part of the north-west corner of the lake was occupied by 

 beds of what I think is a form of P. lucens, but not altogether 

 agreeing with the description of that plant. It accords well 

 enough with the var. acuminatus Schum. in its acuminate leaves 

 and long peduncles, but the margins of the leaves appear to be 

 entire and not serrulate. Many of the plants had floating 

 leaves. 



Of the Batrachian Ranunculi, two or perhaps three species 

 were found. One was remarkable for having flowers fully 

 expanded a foot or more below the surface of the water, which 

 did not appear to have increased in depth since the plants 

 came into flower. Another had floating leaves, but no sub- 

 merged ones, which perhaps, however, had decayed, as it is one 

 of the species which should have capillary leaves. I will not, 

 however, attempt to determine the species we found till I have 

 had an opportunity of examining them more carefully. 



Littorella lacustris of course formed a green turf in many 

 parts, but appeared not to fruit ; along with it was Subularia 

 aauatica, with abundance of pods. Where the water was 

 shallower, Lobelia Dorimanna grew, the plants being more 

 scattered, and not forming a continuous bed like Littorella. 

 Another species of Callitrichc, with distant, long, narrow leaves, 

 was also found, but as there was no fruit, it is difhcuit to say 

 to what species it ought to be referred. 



