ARACE^—LEMNACE^. 147 



streams, may belong to this species, but in tbe absence of flowers, which 

 seem never to form, the identification is imcertain. 



4. S. mlnlmuxn Fries. 



Lakes and other still-water— very rare. Fl. mid. June till mid. Aug. 

 Down -ConHg Hill ; R.Ll.P. 



Antrim— In some plenty in lakelets at south end of Rathlin Island ; 

 S.A.S. Loughnacranagh on Fairhead ; R.Ll.P. 



Order LXVI. A R A C E JE . 

 ARUM Linn. Wake Robin. 



1. A. maculatum Linn. Lords and Ladies. 

 Woods, and damp shady hedge banks— common. Fl. May and early 

 June. 



Order LXVII. lEMNACBJE. 



]LSMXrA Linn. Duckweed. 



1. 1», trlsulca Linn. 



In ditches, lakes, and stagnant or very slowly moving water—common, 

 but much less general than the next species. Fl. June {Cyb. Sib.). 



2. Ii. minor Linn. 



Marshes, ditches, and still places in sluggish streams— very common. 

 Rarely flowers, but found in flower by Mr. Templeton, Aug. 6th, 1802. 



3. Ji, iTibba Linn. 



Stagnant ditches— rare, apparently, though profusely abundant in 

 some places. Fl. June and July {Cyb. Hib.). 



Down— Ne wry canal, occasionally, and by the Quoile below Down- 

 patrick, also in brackish ditches between Queen's Quay and 

 Connswater ; S.A.S. Ballycroghan near Bangor ; R.Ll.P. 

 Antrim— By the Lagan canal near Belfast ; Flor. Ulst. By the Lagan 



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