410 THE PONDWEED FAMILY. 



HABITATS AND LOCALITIES. 



1. Common Pondweed — {Potamogeton nalans.) 



Pools, ponds, and stagnant waters, everywhere ; covering them 

 durirag summer with its broad flat leaves, among which in July, there 

 are innumerable spikes of flowers. The leaves, like those of the 

 nasturtium, resist wet, and though floating on the water, are always 

 quite dry, at least on the upper surface. 



E. B. XXV. 1822 ; Baxter, v. 350. 



About Lymm this plant is called " flatter-dock." A small variety of it is distin- 

 guished by some under the name of Potamogeton oblongus. (E. B., Supp. iii. 2849.) 

 The latter grows on Hale Moss, about Dunham, Lindow, and in many other places. 



2. Shiking Pondweed — {^Potamogiton lucens.) 

 Rostheme Mere, plentiful. Ponds about Chorlton and Stretford. 



Worsley. (J. E.) In profusion in one of the ponds near the Hall in 

 Dunham Park. Fl. June, July. 



E. B. vi. 376. 



3. Beown Pondweed — {Potamogeton rufescens.) 

 Common in ponds about Old Trafibrd, Chorlton, Altrincham, and 



generally near Manchester. Fl. July, August. 



Curtis, iv. 589. ; E. B. xviii. 1286 (both as Potamogeton Jluitans). 

 Probably not distinct from P. lucens, from Tvhich there is little to distinguish it 

 beyond the floating upper leaves and their brownish hue. This is the plant refei'red 

 to in the " Flora Mancuniensis," p. 14, under the name of " P. heterophyllus." 



4. Pebfohate Pondweed — {Potamogeton perfoUdtus.) 

 Rostherne Merc. Canal near Montou Green. Abundant in the 

 canal at Worsley. (J. E.) Little Hulton. (R. H.) Fl. July, August. 



E. B. iii. 108. 

 A very elegant species. 



5. Crisp-leaved Pondweed — {Potamogeton crispus.) 

 Ponds, canals, and slow-moving waters, common. Water in Age- 

 croft Park. Reservoir at the foot of Mere Clough. Chorlton. Sale. 

 Old Traffbrd. Very abundant in the large pond opposite lloywood's 

 Farm, Dunham Park. Tlio whole pond is fringed with it for a dis- 

 tance of eight or nine feet. Fl. June, July. 



Curtis, ii. ;K)7 ; E. B. xv. 1012 (the. leaves too much lobt-d). 

 Very btuutiful and curious in its foliage, though inferior to the P. lucens. 



