THE FLORA OF LIVERPOOL. 



8. L. POLYRHIZA. L. (Greater D.) " Flowers unknown 

 in Britain." 



Stagnant waters, not uncommon. Kirkdale, — K. Tudor. 

 Abundant in Garston Pond. — W.S. Abundant in a pond 

 near Club Moor, — J.S. 



4. L. GiBBA. L. (Gibbous D.) June — September. 



In ponds and ditches about Liverpool, occasionally. 



Ord. XCI. Naiad ACEiE. Juss. 

 The Pondweed Family. 



1. POTAMOGETON. Linn. Pondweed. 

 Tetrand. Tetragyn. L. 



1. P. PECTIN ATus. L. (Fennel-leaved P.) June, July. Vr 



Ponds and streams, not uncommon. Abundant in the 

 Canal, between Bootle and Litherland. Streams and 

 ponds about Formby, frequent. Pit near the Bridge at 

 Poulton, plentifulj—W.S. 



2. P. PUsiLLus. L. (Small P.) July, August. 2^ 



Var. a. Hook. & Arnott. " Leaves three nerved, 

 nerves in the middle, between the midrib and 

 margin/' 



Ditches and ponds in Wirral, frequent. Plentiful also 

 near Bootle, Crosby, and Formby. 



Var. b. Hook. & Arnott. P. compressus. L. 

 "Leaves broader, with an accessory nerve on 

 each side, between the margin and the primary 

 lateral ones." 



Ditches and ponds, not uncommon. Plentiful about Bid- 

 ston, Leasowe, Hoylake, &c. Also on Crosby and Formby 

 marshes, and near Southport. 



3. P. GRAMiNEUS. L. (Grassy P.) July. 2| 



Ponds and ditches. Near Bock Ferry. Plentiful on 

 Crosby Marsh, near Hightown Station, — W.S. Not un- 

 frequent in a large brook which nms through Croxteth 

 Park,— W.H. 



4. P. CR1SPU8. L. (Curly P.) June, July. 2^ 



Ditches and ponds. Not unfrequent in Winal. Abundant 

 on Bidston Marsh. Canal beyond Bootle, plentiful. 



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