296 POTAMOGETONACEfi. 



Ponds and streams ; very rare. P. June, July. 

 III. In the Thames at Twickenham; M. # G. 209. 



VII. In the great circular pond opposite Kensington Palace ; Herb. Hardw. 

 Isle of Dogs ; Irv. Lmid. Fl. 86. 



First record : ? Milne and Gordon, 1793. 



717. p. compressus, L. P. mucronatus, Sckrad. (Syme E. B.). 

 Cyb. Br. iii. 12. Syme E. B. ix. t. 1418. 



Streams and ditches ; very rare. P. June— August. 

 II. About Staines, abundantly ; Hicds. ii. 76. 

 IV. Streams at Harrow Weald ; Mclv. 83. 



VII. Not very uncommon about London; Sm. E. B. 418. Isle of Dogs, 

 1817; Herh. G. ^ E. 

 First record: Hudson, 1778. 



718. P. pusillns, L. 



P.pusill. gramineo foL caule tereti (Pec). P. gramineum tenuifolium 



(Budd.). 

 Cyb.Br.iii.il. Syme E. B. ix. t. 1419. 

 Streams and ditches ; rather rare. P. June, July. 

 II. Ditches, Staines ; Cooj>er, 115. 



III. In the river on Hounslow Heath with Mr. Doody, 1705 ; Budd. MS8. 



vi. and Herb, cxrii. fol. 29. Chase Bridge, Whitton, G. Francis ; 

 Coop. Supp. 12. ' 



IV. Pond by Pinner Drive ; Mel v. 83. 

 V. Canal at Greenford ; Melv. 83. 



VII. New Eiver Head, plentifully ; Pet. Midd. In the New Eiver ; [in the 

 Green Part;] M. # G. 212. Isle of Dogs, 1817; Herb. G. # i?. 

 Reservoir at Clifton Villas, Camden Town ; in 1856 several cartloads 

 were taken out ; Jewitt.* 

 First record: Buddie sj^iSl. Doody, 1705. 



719. P. pectinatus, L. (Syme E. B.). 

 Cyb. Br. iii. 10. 



Streams and ponds ; rather rare. P. June, July. 



1 . P. flahcllatus, Bab. 

 Syme E. B. is. t. 1421. 



II. Thames bet. Hampton and Kingston Bridges, 1867 ; Bloxam, Ibid., 

 1869; Warren. 

 III. Duke's Eiver, near Chase Bridge. 

 VII. Paddington Canal, near Kensal Green, 1869 ! ; Warren. 



2. P. pectinatus, L. (Bab.). P. eu-pectinatus (Syme). 



E. B. 323, reproduced in Syme E. B. ix. t. 1422 (drawn from a 

 Middlesex specimen). 



* Mr. Orlando Jewitt, wood-engraver, died May 30, 1869, whilst these sheets were 

 passing through the press. 



