368 LEMNACE^. ILemna. 



OEDEE LXXII.— LEMNACE^. 

 LEMNA Linn. 



1. L. trisulca Linn. — Ivy-lea/ved Duckweed. 



Districts I. II. III. IV. V. VI. VII. — IX. X. — XII. 



Lat. 51f°-55i°- From South to North. Type, English-British. 



Lowland. Ditches, pools, hog-holes, canals, &c., in stagnant 

 water ; rather frequent. Fl. June. 



I. In two or three places ahout EjUamey, not noticed elsewhere 

 in Ken-y ; R. W. 8.— 11. Bnttevant ; Eermoy ; Toughal ; Midle- 

 ton; &c. : Allin's Cork. Inch hog near Power Head, Cork, 1895 ; 

 PMlUps. Ealharry hog near Waterford : B.S. 8f G. i8go. — III. 

 Bog near Graigavern, to the south of Monasterevan and in Queen's 

 Co. : Hart 1885. — IV. Ditches on the Murrough of "Wictlow 

 {Moore) ; hog near Enniscorthy, "Wexford ( Carroll) : Cyl. At EjI- 

 manock, and in the Pill of Eathdooney, Eosslare, Wexford: 

 B.S. Sf Q. iSgo. — ^V. Erequent, occurring in Meath, Louth, and 

 Duhlin. — VI. At Tuam : Wade Oallovid. Plentiful near Limerick 

 ( Carroll) ; ahundant in drains at Portumna {Moore) : Cyh. — VII. 

 Doonis Lough, Lough Eee : £. Sf V. i88y. Kilmaglish and Scraw 

 Bog, "Westmeath : Levinge i8g4. — IX. Hazelwood near Sligo 

 {Admiral Jones) : Cyh. Claremorris lake, Mayo, and adjoining 

 ditches : Ma/rskall i8g6.—^. Near Crum Castle, Lough Erne : 

 Barrington 1884. — XII. Common in north-east Ireland : Flor. 

 N.-E. 



2. L. minor Linn. — Common Duckweed. 



Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. 



Lat. 51J°-55i°. Throughout Ireland. Type, British. 

 Ponds and ditches ; common. Fl. June-July. 

 Sea-level in N. Antrim and S. Cork. To 850 ft. in Duhlin 



(JV. C). 



3. L. gibba Linn. — Gibbous Duckweed, 



Districts — II. — IV. V. VI. — — — X. — XII. 



Lat. 52J°-54J°. South to North. Type, English-Germanic. 



Lowland. Stagnant ponds and ditches ; rare. Fl. Jime-July. 



