184 Botany. 



N.O. 5. APONOGETONACEM (under Naiadacea, B. & H.). 



APONOGETON distachyum, Th., with curious sweet-scented Us., 

 is in the fountain at Avery Hill, '06. J.F.B. It is an alien 

 aquatic from the Cape. 



N.O. 6. NAIADACE^E. Now limited to a single genus Naias, 

 not found in our district. 



N.O. 7. POTAMOGETONACE& (under NAIADACEM, 

 B. & H.}. 



(451) POTAMOGETON, L. Aquatics with floating or sub- 

 merged leaves and aerial protogynous wind-pollinated 

 flowers. 



1580. P. natans, L. 67, P. Least modified for a water existence 



(Schenck). Common. 



1581. P. polygonifolius, Pourr. (under NATANS, B.). 7, B. Prob- 



ably not unfrequent. 



1. Lower pond, Keston Common, '01. W.H.G. 



var. c.) ericetorum, Eng. Bot. 



1. Bottom of boggy valley, Keston Common, '03. W.H.G. 



1590. P. lucens, L. 6, P. Rather common, but the records are 

 very old. 



1595. P. perfoliatus, L. 7, P. Frequent. 



1. In the Darenth, near Eynsford, '05. W.H.G. 



a. Marshy districts near the Thames, 1877. 



b. In the Ravensbourne, near Lewisham, 1793. 



1596. P. erispus, L. 6, P. Common. 



1. Roadside pond near Westerham, '02. W.H.G. 



2. Long pond, near Brickfield, Eltham, '06. L.C.C. 



var. b.) serratus, Huds. 



1. Stone Marshes. Dod teste Bennett. 



1597. P. densus, L. 6 7, P. Not uncommon. 



1. Stone Marshes, '03. W.H.G. 



1602. P. pusillus, L. 6, P. Frequent. 



1. Plumstead Marshes. Dod. 



2. Between Greenhithe and Northfleet. Jackson. 



a. First record, 1793 : In the marshy meadows between 

 Greenwich and Woolwich. 



