262 CEEATOPHTLLACEiE. [Ceratophyllum. 



Crumlin, by Lough Neagh; Miss Maffett and Mr. S. A. 

 Stewart. Marino, Holywood ; Fhr. Bdf. 



The locality of "woods near Bantry" is given in "Flora 

 Hibernica" on the authority of Miss Hutchins, but the speci- 

 men in Dr. Mackay's Herbarium is M. annua. 



2. t M. annua (Linn.) — French Mercury. 

 Districts 123-5------- 



Lat. 51°-54°. South and East of Ireland. 

 Type in Great Britain, English." 



Cultivated land and waste places ; very local. Fl.' July, 

 August. 



1. On the shore near Beal Castle, plentifully; Smith's 

 " Kerry." — 1 and 2. Sunday's well, and by the Lough, rather 

 common; Flor. Cork, and found by Mr. Carroll plentifully 

 in a few places near the city of Cork. — 2. In Waterjord 

 (in the grounds of Newtown school); Miss S. Grubb. — 

 3. Abundant in potato-fields near Kilkenny ; Mr. John Sim. — 

 5. Abundant in cultivated ground, fields, gardens, and waste 

 places- in the vicinity of Dublin ; Flor. Hib., &c. Near the 

 station at Blanchardstown, Dublin ; A. Q. M. 



Only in the neighbourhood of towns and houses, and, 

 though now a common weed about Dublin, it occurs, even 

 there, principally as a " colonist." 



ORDEE LIX.— CEEATOPHYLLACEiE. 



CEBATOPHTLLTIM Linn. 

 1. C. demersum (Linn.) — Common Homwort. 

 Districts 12--5 '--?--- 12 

 Lat. 51°-56°. South, East, and North-east of Ireland. 

 Type in Great Britain, English, inclining to British. 

 Lakes, pools, and ditches ; very rare. Fl. June, July. 

 1. In the Lough of Cork, abundantly (Mr. D. Murray) ; 

 Fhr. Cork, and still found there by Mr. Carroll. — 2. Mel- 

 brook, near Clonmel (Miss A. Taylor) ; /. C.—^. Pools near 



