52 Botany. 



(6) RANUNCULUS, L. 



R. aquatilis, L. 5 8 (WATER BUTTERCUP), P. V. common. 

 Under this name B. & H. include all the pond- weed 

 (Batrachian) forms with submerged dissected leaves, look- 

 ing upon the so-called sp. described below (14 21) as 

 varieties, more or less constant in character. The sub- 

 merged leaves in running water are linearly dissected, and 

 in stagnant water they approach the laminate form ; but 

 the floating leaves, if present, are entire. This buttercup, 

 having only recently taken to the water, shows, as conditions 

 vary, more or less terrestrial characters. When above 

 water the fls. are visited by small insects, chiefly flies, 

 when submerged, they are self-fertilised. 



14. R. divaricatus, Schr. (CIRCINATUS, Sibth), 6 8, P. 



1. Erith. Dod, H. & J. Groves, '00. 



2. Greenhithe. H. 



3. Eynsford M. 



4. Ditches by the railway below Crayford. Dod. 



16. R. pseudo-fluitans, " Bab.," Hiern. 46, P. 



1. By Crayford Mill ; betw. Springhead and Northfleet 



Station. Dod. 

 a. Charlton. Linford. 



17. R. trichophyllus, Chaix. 46, A. 



1. Plumstead Marshes. Dod. '00, H. Groves. 

 a. Sidcup. Holmes. 



18. R. Drouetii, Schultz, 46, A. 



1. Plumstead Marshes. Dod and first record (c. 1858). 



2. St. Mary Cray ; betw. Springhead and Northfleet 



Station. Dod. 

 2. Dartford Marshes, '03. W.H.G. 



4. Higham Marshes. H. 



5. Port Victoria. M. 



var. b.) Godronii, Gren. 

 a. Pond by roadside betw. Woolwich and Eltham. Dod. 



19. R. heterophyllus, Weber, 57, P. 



1. Pond at Eltham ; pond opposite Well Hall, Eltham (?) ; 



Shorne Warren. Dod. 



2. Southend pond, Catford, '03 ; Lullingstone Park, '04. 



W.H.G. 



3. Pool outside Ladies' Close Wood, nr. Cliffe. M. 



20 R. peltatus, Schrank, 56, P. 



1. Plumstead Marshes ; Shorne Warren. Dod. 



