180 COLONSAY 



(the Naiad family) 



An order of marsh or aquatic plants, some with floating 

 leaves, others entirely submerged in deep water, occurring in 

 the sea as well as in fresh waters. All the following are 

 perennials. 



Triglochin, L. 



T. palustre, L. Arrow-grass. Barr-a-Mhilltich, C. 

 Boggy and marshy places. June. Cows are extremely fond 

 of it. W. 



T. maritimum, L. Sea Arrow-grass. Not uncommon in 

 the salt-marshes. May. 



Potamogeton, L. 



A considerable genus, difficult to determine, and abundantly 

 represented throughout the island. The plants in the 

 following list were identified by Mr Arthur Bennett, F.L.S. 



P. natans, L. Broad Pondweed. Kiloran burn. Common. 

 July. 



P. polygonifolius, Pourr. Oblong Pondweed. Duilleaga- 

 baite. The common kind abundant in running and in 

 stagnant waters, deep and shallow. The leaves were applied 

 to scalding burns for cooling. Also used as an ingredient 

 in certain plasters. Duilleaga-baite-firionn were credited 

 with greater healing properties than other kinds, but the 

 species to which the name applied was not discovered. July. 



P. polygonifolius, var. pseudo-fluitans. Marsh ; head of 

 the Glen. 



P. Gessnaceasis, Fischer. Pool of brackish water, Rudha 

 Gheadha. This is a hybrid between P. natans, L., and 

 P. polygonifoUus, Pourr., and occurs in Ireland (A. B.). 



P. alpinus, Balb. Burn, Geadhail-na-Crithe. June. 



P. heterophyllus, Schreb. Various-leaved Pondweed. 

 West Loch Fada and Loch Colla. July. 



