ROKIPA /nasturtium^ 4I 



margins of ponds and ditches, or about springs in woods ; it has 

 small roundish leaves, a slender stem and rather larger flowers than 

 the type. It has been noticed at Wytham, Appleton, Wantage, 

 Radley, Marcham, Aldermaston, Mortimer, in Windsor Park, &c. 



Var. siiFOLiA, Beck, 1. c. {Nasturtium siifolium, Reichb. Ic. Plant. Crit. 

 ix. f. 1 132}, as restricted by Syme in E. B. 177, has a stout stem, 

 large broad leaflets, the terminal one of which is lanceolate and not 

 conspicuously wider than the lateral ones. It has been seen at Alder- 

 maston and near Padworth, and by Mr. Bolton King near Windsor. 

 The commoner form of this luxuriant state has the terminal leaflet 

 broader, but otherwise not very different from the lateral ones ; 

 this appears to be the var. latifolta {Nasturtium officinale, var. lati- 

 folium, Bouvier, Flore des Alpes), and has been noticed at Wytham, 

 near Hagborne, near Englefield, near Pangbourn, Southcote, Alder- 

 maston, &c. 



The Water Cress is common in all the bordering counties. 



S. sylvestris, Bess. Enum. PL Volh. 27 (1822). Creeping Wafer Rocket. 

 Sisymbrium sylvestre, Linn. Sp. PL 657 (1753). Eruca aquatica, Ger. Em. 

 248. Nasturtium sylvestre, R. Br. in Alton, Hort. Kew. ed. 2, iv. no, 

 in Index Kewensis, and in Fl. Oxf. 



Top. Bot. 44. Syme, E. B. i. 175, t. 126. Nyman, 35. Fl. Oxf. 25. 

 Native. Paludal. Wet meadows, river-banks. Local. A. May-October. 

 First record. Sisymbrium stjlvestre. Banks of the Thames near Windsor. 

 Common. Mr. Gotobed in the Botanist's Guide of 1805. 



1. Isis. Wytham. Near Eynsham. 



2. Ock. South Hinksey. Marcham, Walker. Denchworth, Wait. 



South Hinksey. Kennington. Radley. Abingdon. Near 

 Dorchester. 



3. Pang. Moulsford. Streatley. Pangbourn. 



4. Kennet. Reading.. Burghfield. Theale. 



5. Loddon. Banks of the Thames near Windsor. Common, Goto- 



bed, Wargrave, Melvill. Near Sonning. Aston. Coleman's 



Moor. Loddon Bridge. Near Bray. Old Windsor. 



This plant varies in the length of the pods and their pedicels, and 



also somewhat in the leaf-cutting ; the more entire-leaved form 



appears to be var. dentata {Nasturtium sylvestre, var. dentatum, Koch, 



Syn. Fl. Germ. 38 (1845)). 



Roripa sylvestris is not recorded in Townsend's Flora of Hampshire, 

 but it will probably be found by the Blackwater. It is recorded for 

 all the other bordering counties. The Binsey locality, cited for Berk- 

 shire in Britten's Contributions, is in Oxfordshire. 



B. palustris, Bess. Enum. PL Volh. 27 (1822^. Yellow Cress. 



Sisymbrium palu^tre, Leyser, Fl. Hal. 166. S. terrestre, Curt. Fl. Lond. v. 



