| Potamogeton gramineus | IE, VCH25 Co. Roscommon, River Suck | Harry Corbyn Levinge | Watson Botanical Exchange Club Arthur Bennett Harold Stuart Thompson | 26/7/1891 | BIRM |
| Potamogeton pectinatus | GB, VC6 North Somerset, Pill | Harold Stuart Thompson | Arthur Bennett Harold Stuart Thompson | 22/7/1916 | BIRM |
| Potamogeton pusillus | GB, VC17 Surrey, Hedge Court Pond | Mary Louisa Wedgwood | Watson Botanical Exchange Club Harold Stuart Thompson Arthur Bennett | 10/9/1920 | BIRM |
| Ranunculus peltatus | GB, VC41 Glamorganshire, Kenfig Pool | Carr | Watson Botanical Exchange Club Arthur Bennett Harold Stuart Thompson | 1905 | BIRM |
+ | Corynephorus canescens | GB, VC27 East Norfolk, Great Yarmouth,North Denes | Arthur Bennett | | 7/1877 | MANCH |
| Achillea millefolium | GB, VC112 Shetland, Fair Isle | Ernest Straker | George Stephen West Arthur Bennett | 7/1894 | BIRM |
| Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC17 Surrey, Brookwood | Ernest Straker | Arthur Bennett William Hadden Beeby | 7/1883 | SLBI |
| Potamogeton polygonifolius | GB, VC46 Cardiganshire, Llyn-y-Gorlan | Ernest Straker | Arthur Bennett | 26/8/1881 | E |
| Vicia lathyroides | GB, VC17 Surrey, Shalford GB, VC21 Middlesex, Colney Hatch | Ernest Straker | Croydon Natural History and Scientific Society Arthur Bennett | 16/5/1885 16/5/1886 | SLBI |
| Carex laevigata | GB, VC86,VC99, Rowardennan | John Stirling Stirling Robert Kidston | Arthur Bennett Robert Kidston | 7/7/1890 | E |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Allan Octavian Hume Arthur Bennett John Stirling Stirling | 24/8/1894 | SLBI |
| Caltha palustris var. radicans | GB, VC17 Surrey, Kew | Arthur Bennett Gilbert A C Stewart | William Hadden Beeby | | SLBI |
| Ruppia rostellata | GB, VC111 Orkney, Deerness | Magnus Spence | Allan Octavian Hume Arthur Bennett | 9/1909 | SLBI |
| Erophila verna | GB, VC34 West Gloucestershire, Tidenham Chase | William Andrew Shoolbred | Arthur Bennett William Hunt Painter | 5/3/1896 to 4/4/1896 | ABS |
| Gentianella campestris | GB, VC110 Outer Hebrides, Benbecula | William Andrew Shoolbred | William Hadden Beeby Arthur Bennett | 29/7/1894 | SLBI |
| Seseli libanotis | GB, VC29 Cambridgeshire, Cherry Hinton | Arthur Bennett J Bennett | Watson Botanical Exchange Club William Robert Sherrin | 5/8/1907 | SLBI |
| Carex aquatilis x nigra = C. x hibernica | IE, VCH1 South Kerry, Kenmare | Reginald Wiliam Scully | Allan Octavian Hume Reginald Wiliam Scully Arthur Bennett | 5/6/1889 | SLBI |
| Potamogeton gramineus | IE, VCH2 North Kerry, Killarney,Lower Lake | Reginald Wiliam Scully | Arthur Bennett | 7/1889 | E |
| Potamogeton gramineus | IE, VCH2 North Kerry, Killarney,Lower Lake | Reginald Wiliam Scully | Arthur Bennett | 7/1889 | E |
| Potamogeton polygonifolius | IE, Kerry, Beaufort Bridge | Reginald Wiliam Scully | Arthur Bennett Reginald Wiliam Scully | 27/7/1889 | E |
| Potamogeton polygonifolius | IE, Kerry, Killarney | Reginald Wiliam Scully | Botanical Exchange Club of The British Isles Arthur Bennett Reginald Wiliam Scully | 8/1888 | MANCH |
| Carex acutiformis | GB, VC17 Surrey, Mitcham | Arthur Bennett Jessie Bennett | Arthur Bennett Charles Edgar Salmon | 1/6/1903 | BM |
| Carex acutiformis | GB, VC17 Surrey, Norwood | | Arthur Bennett Charles Edgar Salmon | 17/6/1865 | BM |
| Carex acutiformis | GB, VC57 Derbyshire, Monsal Dale | Henry (Harry) Searle | Arthur Bennett Charles Edgar Salmon | 7/1885 | BM |
| Carex acutiformis | GB, VC65 North-west Yorkshire, Hawes | Thomas Atkinson Cotton | Arthur Bennett Charles Edgar Salmon | 29/7/1889 | BM |
| Carex acutiformis | GB, VC73 Kirkcudbrightshire | James McAndrew | Arthur Bennett Charles Edgar Salmon | 1887 | BM |
| Carex acutiformis | GB, VC74 Wigtownshire, Monreith Lake | James McAndrew | Arthur Bennett Charles Edgar Salmon | 7/1887 | BM |
| Carex acutiformis | GB, VC74 Wigtownshire, Portencorkrie Bay | Arthur Bennett | Arthur Bennett Charles Edgar Salmon | | BM |
| Carex acutiformis | GB, VC74 Wigtownshire, Sorbie | Arthur Bennett | Arthur Bennett Charles Edgar Salmon | | BM |
| Carex acutiformis | GB, VC74 Wigtownshire, Wigton | James McAndrew | Arthur Bennett Charles Edgar Salmon | 7/1889 | BM |
| Carex acutiformis | GB, VC83 Midlothian, Borthwick | | Arthur Bennett George Nicholson Robert Wight William Hunter Campbell Charles Edgar Salmon | 6/7/1833 | BM |
| Carex acutiformis | GB, VC90 Angus, Clova | Isaac Henry Burkill | Arthur Bennett Charles Edgar Salmon Isaac Henry Burkill | 7/1895 | BM |
| Carex acutiformis | GB, VC91 Kincardineshire, Muchalls | Traill | Arthur Bennett Charles Edgar Salmon | 8/1904 | BM |
| Carex acutiformis | IE, VCH6 Co. Waterford, Clonea Castle | Richard Manliffe Barrington | Arthur Bennett Charles Edgar Salmon | 26/5/1899 | BM |
| Carex acutiformis x riparia = C. x sooi | GB, VC63,VC64, Rawdon | | Arthur Bennett Charles Edgar Salmon | 7/1909 | BM |
| Carex appropinquata | GB, VC24 Buckinghamshire, Loudwater | John Benbow | Arthur Bennett Charles Edgar Salmon | 27/5/1896 | BM |
| Carex appropinquata | GB, VC26 West Suffolk, Icklingham | Clarke | Arthur Bennett Charles Edgar Salmon | 6/1910 | BM |
| Carex appropinquata | GB, VC27 East Norfolk, Barton Broad | Charles Edgar Salmon | Arthur Bennett Charles Edgar Salmon | 31/5/1912 | BM |
| Carex appropinquata | GB, VC27 East Norfolk, Ranworth | Arthur Bennett | Arthur Bennett Charles Edgar Salmon | 6/1884 | BM |
| Carex appropinquata | GB, VC27 East Norfolk, Ranworth GB, VC27 East Norfolk, Stalham | Charles Edgar Salmon | Arthur Bennett Charles Edgar Salmon | 6/1902 | BM |