POTAMOGETONACE^, 297 



I. Euislip Eeserroir, W. M. H.; Melv. 82. Canal north of Harefield ! ; 



Kewb. 

 II. Grand Junction Canal, W. Drayton I ; Newb. Staines Moor. 



III. Harrow ; Herb. Harr. 

 . V. Canal at Apperton. 



VII. Serpentine Eiver, Hyde Park!; Huds. i. 62. Ibid. 1795 ; Sm. E. B. 



Lake in Eegent's Park ; Eiver Lea, E. F. ; Herb. Mus. Brit. Pad- 



dington Canal; Irv. M8S. Thames near Putney Bridge, 1817; 



Herb. G. ^ B. Eound pond, Kensington Gardens ; Warren. 



First record: Hudson, 1762. Both subspecies are figured by Petiver, 



H. B. Cat. V. figs. 12, 13. The P. zosteraceus {Bab. Man. eds. i., ii.) 



of the ' Serpentine, Hyde Park, Dr. J. A. Power,' was a form of 'pee- 



tinatus. The locality was omitted in subsequent editions, when the 



name was changed to P. flabellatus; nor is it given in a list, by 



Mr. Babington, of localities for the latter plant in Phyt. iv. 1160. 



720. P. densus, L. 



. Cyb. Br. iii. 9. Syme E. B. ix. t. 1414. 



Ditches and streams ; rather rare. P. June — August. 

 I. Colne near Iver Bridge ! ; Newb. 

 II. Colne, Staines Moor. Staines Common. Common by Walton Bridge. 

 Bushey Park. 



IV. Hampstead ; Irv. M88. Stanmore. 

 V. Canal at Greenford ; Melv. 82. 



VII. Canal towards Hampstead Eoad, 1815; Herb.G.^R. Marsh ditches, 

 Hackney Wick. Isle of Dogs. 



First record : Goodffer a7id Bos:ea, IS15. 



ZANNICHELLIA, Li7m. 



721. Z. palastris, Linn. 



Potamogeito affinis graminifolia aquatica (Pet., Doody). Aponogcion 



aquat. graminifol. stamin. sing. (E. Syn. iii.). 

 Cyb. Br. iii. 23. Syme E. B. ix. t. 1425. 



Ponds and ditches ; rather rare. A. or P. June — August. 



I. Several pools at Pinner, W. M. H. ; Melv. 83. Pond by the church, 



South Mims. 

 II. Ditches, Staines ; Cooper, llo. 

 IV. Pond below the ' Spaniards,' Hampstead. 

 VI. Pond by brick ground on Finchley side of Highgate Archway ; Bavies. 



Hadley ! ; Warren. 

 VII. Pond at upper end of Stroud Green ; Boody MSS. SmaU pond on 

 east side of Islington; Pet. Midd. Bj' St. Pancras Church near 

 London; Bill, in E. 8yn. iii. 136. [Tothill fields, J. Sowerby; 

 Smith M88.] Carlton Eoad, Kilburn, 1869!; Warren. Ditches 

 in Isle of Dogs, abundant. 



