"706 Proceedings of the Royal Irish Academy. 



Potamogeton rufeseens, Sclirad. — Only in a drain near Ballykeeran, 

 with Ranunculus trichophyllus. 

 ,, perfoliatus, Linn. — Common. 



,, heterophyllus, Schrad. — Common. 



,, %i%ii, Eoth. — Plentiful. In the lake a form closely 



approaching P. lucejis occurred, but was referred to this 

 species by Mr. Bennett. In the Eiver Inny a very 

 different form was gathered, with willow-shaped 

 leaves, about half an inch broad, and three or four 

 inches long, which has also been referred to this 

 species by the same authority. 

 ,, lucejis, Linn. — Common. Difficult to distinguish from 



specimens named P. %i%ii by Mr. Bennett. 

 ,, pusillus, Linn. — Prequent in drains. 



,, pectinatus, Linn. — A long form resembling P. flabellatus 



was gathered in the Inny. 

 „ flahellatus, Bab. — In the Shannon near Athlone. 



,, filiformis, IS^olte. — Prequent. A very long and slender 



form, with the leaves distant, and peduncles 8 to 10 

 inches long, occurs in deep water. It exactly re- 

 sembles Barrington's Lough Erne plant. The shorter 

 variety, figured in Symes' Englisli Botany was also 

 gathered. 

 Zannichellia palustris, Linn. — In a drain near Kiltoom. 

 Sagittaria sagittifolia, Linn. — Eiver Inny, and many other 



localities. 

 Sydrocharis morsus-rance, Linn. — Doonis Lough, Coosan Lough, and 

 Einanny Point. 

 "^Elodea canadensis, Mich. — Shannon at Athlone, Eiver Inny, &c. 

 Said to be disappearing. 

 Orchia incarnata, Linn. — Two forms occurred, one with deep claret- 

 coloured flowers and broad leaves, the other with lilac 

 flowers, usually taller, and with narrower leaves. The 

 former was perhaps latifolia. As to Symes' plate of 

 Orchis incarnata, "Linn.," in his English Botany, 

 see Paper read by C. B. Clarke, Journal, Linnsean 

 Society, vol. xix., p. 206. 

 Gymnadenia conopsea, Brown. — Athlone and one or two other places ; 



but scarce. 

 JSahenaria viridis, Brown. — Apparently scarce. 



,, hifolia, Bab. Man. — Abundant in many places. 



,, chlorantha, Bab. — Only observed in one locality on the 



east side of Einardo Bay. 

 Ophrys apifera, Huds. — Generally distributed all round the lake. 

 Epipactis latifolia, Auct. — Hare Island. 



,, falustris, Crantz. — One or two places round Killinure 

 Lough, and abundant in meadows near Athlone. 



