Anacharis.] HTDEOCHAEiDACEiE. 279 



B. Hamilton). — 6 (or 7). Banks of the Shannon near Por- 

 tumna ; Fbr. Rib. (not found recently). — 10. In a drain 

 near Crum Castle, on the banks of Lough Erne (Dr. Scott). 

 In drains by the side 6f the road near Castle Saunderson, 

 Cavan ; Machay Cat. Ir. Plentiful on the shores of Lough 

 Erne, from Drumgown, in Fermanagh, to Belturbet, in 

 Cavan ; profusely where the canal joins Lough Erne ; and 

 also in lakes between Belturbet and the town of Cavan ; 

 D. M. — 12. Belfast watercouse (Mr. Templeton) ; Flw. Hib. 

 Dams at White-house; Flor. Ulst. Springfield dam; Flor. 

 Bdf. (planted near Belfast). 



Thoroughly at home in the lakes and ditches of Cavan 

 and Fermanagh, but like Anacharis, it is a plant which very 

 quickly spreads when once introduced. In England its dis- 

 tribution is " G-ermanic." In France there is only a single 

 locality where the male plant alone occurs. In Germany it 

 is stq,ted to have been originally planted, now abundant. 



ANACHARIS Rich. 

 1. * A. Alsinastrum (Bab.) — Water Thyme. 

 Elodea canadensis (Rich.), Bentham. , 



Districts 123-567---- 12 



Canals, ponds, and streams ; as yet rather local. Fl. 

 July, October. 



A native of America recently introduced, but now not 

 unfrequent in canals, streams, and ponds in many parts of 

 Ireland. Abundant in the canals near Dublin and Belfast, 

 whence it has extended to Lough Neagh and the river 

 Shannon, and is still spreading, having become in some 

 places a very troublesome weed. Professor Murphy de- 

 scribes it as being now a great nuisance in the river Lee, 

 below Cork, having been introduced in 1851. Mr. Carroll 

 has seen it growing plentifully in the river at Carlow. 



Dr. Dickie has recorded its having been observed in a 

 pond at Waringstown, Down, about the year 1836 (Phytolo- 

 gist, 0. S. v., 88), and in his Flora of Ulster it is stated to 

 have been known near Lisburn for more than twenty years 

 previous to 1864. 



