308 AEACE^. [Arum. 



4. S. minimum (Fries) — Least Bur-reed. 

 S. nutans var. Bentham. 



Districts 12 -4 5 6 ---10? 11 12 

 Lat. 51°-56°. Throughout Ireland. 

 Type in Great Britain, British, inclining to Scottish. 



Lakes, ditches, and bog-holes ; frequent. Fl. July, 

 August. 



ORDER LXXVL— ARACE^. 



ARUM Linn. 

 1. A. maciilatam (Linn.) — Ciickoo-pint, Wake-robin. 

 Districts 123456789 10 11 12 

 Lat. 51°-56°. Throughout Ireland. 

 Type in G-reat Britain, English. 



Woods, hedges, and shady racky places, also on sand-hills ; 

 not unfrequent. Fl. April, May. 



Decreases towards the north and west. 



ORDER LXXVIL— LEMNACE^. 



LEMNA Linn. 

 1. L. trisTilca (Linn.) — Ivy-leaved Duckweed. 

 Districts -2-456--9--12 

 Lat. 52°-55°. Throughout nearly all Ireland, but local. 

 Type in Great Britain, English, inclining to British. 



Ditches and pools ; probably not unfrequent. Fl. June. 



2. In a spring- well near Fermoy ; Drummond. Corrin 

 bog, and Ballyoran bog, near Fermoy ; Mr. T. Chandlee. In 

 Tipperary ; Miss S. Grvhb. — 4. Bog near Enniscorthy, Wex- 

 ford ; /. G. Ditches on the Murrough of Wicklow ; D. M. — 

 5. Ditches at Glasnevin ; D. M. Baldoyle ; Ir. Fhr. Bog 

 of Curragha, Dublin. In drains by the Boyne, a little below 

 Navan ; Mackay Cat. Ir. Ardee bog, and bog at Mans- 

 fleldstown, Louth ; Ir. Flor. — 6. Plentiful near Limerick ; 

 I. C. Abundant in drains near Portumna ; D. M. Tuam ; 



