372 ALISMACE^. [£utomus. 



MS. — and in 1891 : £. N. F. C. Proc. iSqi-gy. In the Lagan near 

 Belfast, but introduced : Mor. Ulst. Abundant in tbe Lagan canal 

 near Moira and elsewbere ; also in the Lake at Ballynabincli, Down 

 {Stewart) : Flor. JSf.-JE. Mouth of the Six-Mile Water ( W. S. 

 Smith); Crumlin waterfoot ( Jfiss iTwoecfo*) : S.SfP. i8g^. 



Prequently planted and perhaps introduced in many of its stations. 



Threlkeld, in his Synopsis, i'j2'j, says that this plant was " sent 

 from the Barrow." 



OEDEE LXXIV.— NAIADACE^. 



TEIGLOCHIN Linn. 



1. T. palustre Linn. — Ma/rsh Arrow-grass. 



Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XL Xll. 



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



"Wet meadows and marshy places ; frequent. Fl. June-August. 



Sea-level in Derry and S. Cork. To 1000 ft. in Donegal and 

 to 1500 ft. in Tipperary {Hart). 



2. T. maritimum Linn. — Sea Arrow-grass. 



Districts I. II. III. IV. V. VI. — VIII. IX. X. XI. XTT. 



Lat. 51i°-55i"^. Coasts of aU Ireland. Type, British. 

 Salt marshes ; frequent. Fl. July-August. 



POTAMOGETOlSr Linn. 



1. P. natans Linn. — Floating Pond-weed. 



Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XL XH. 



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



Lowland. Ponds, lakes, &c. ; common. Fl. June-July. 



2. P. polygonifolius 'Pomii.— Oblong-leaved Pond-weed. 

 Sibernici 'DuiUears an aban {Millis/c an ow-ann). River Dulse. 

 Districts L II. III. IV. V. VI. VII. VIII. IX. X. XL XII. 

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



Streams, bog-holes, &c. ; common. Fl. June-Aug. Caloifuge A, 



