| Thalictrum flavum | GB, VC20 Hertfordshire, Watford | James Groves | Allan Octavian Hume | 31/7/1880 | SLBI |
| Carex paniculata | GB, VC20 Hertfordshire, Welwyn | Henry Groves | Henry & James Groves James Groves | 26/6/1875 | BM |
| Carex ovalis | GB, VC21 Middlesex, Caen Wood | Henry Groves | James Groves | 1874 | BM |
| Hottonia palustris | GB, VC21 Middlesex, Staines | James Groves | Allan Octavian Hume Henry & James Groves | 6/5/1882 | SLBI |
| Hottonia palustris | GB, VC21 Middlesex, Staines | James Groves | Allan Octavian Hume Henry & James Groves | 6/5/1882 | SLBI |
+ | Potamogeton acutifolius | GB, VC21 Middlesex, Staines | James Groves | Botanical Exchange Club Lomax James Groves | 19/7/1879 | MANCH |
| Verbascum blattaria | GB, VC21 Middlesex, Sunbury | Henry Groves James Groves | Augustin Ley Henry & James Groves | 8/1877 | BIRM |
| Medicago minima | GB, VC25 East Suffolk, Sudbourne | James Groves | Allan Octavian Hume Henry & James Groves | 14/7/1900 | SLBI |
| Medicago minima | GB, VC25 East Suffolk, Sudbourne | James Groves | Allan Octavian Hume Henry & James Groves | 14/7/1900 | SLBI |
| Potamogeton berchtoldii | GB, VC26 West Suffolk, Exning | Henry Groves James Groves | Alfred Fryer Henry & James Groves Charles Bailey | 5/7/1887 | MANCH |
| Carex arenaria | GB, VC27 East Norfolk, Caister-on-Sea GB, VC27 East Norfolk, Great Yarmouth | Henry Groves James Groves | Henry & James Groves James Groves | 22/6/1885 | BM |
| Najas marina | GB, VC27 East Norfolk, Heigham Sound | George Russell Bullock-Webster James Groves | Allan Octavian Hume Henry & James Groves | 30/7/1897 | SLBI |
| Potamogeton trichoides | GB, VC27 East Norfolk, Hempstead | James Groves | Allan Octavian Hume Henry & James Groves | 5/8/1897 | SLBI |
| Potamogeton pusillus | GB, VC27 East Norfolk, Horsey | James Groves | Henry & James Groves | 10/7/1912 | MANCH |
| Potamogeton pusillus | GB, VC27 East Norfolk, Ingham | James Groves | Allan Octavian Hume Henry & James Groves | 11/8/1897 | SLBI |
+ | Potamogeton pusillus x trichoides = P. x grovesii | GB, VC27 East Norfolk, Ingham | James Groves | Botanical Exchange Club of The British Isles Charles Bailey Henry & James Groves | 11/8/1897 | MANCH |
| Potamogeton trichoides | GB, VC27 East Norfolk, Ingham | James Groves | Allan Octavian Hume Henry & James Groves | 11/8/1897 | SLBI |
| Potamogeton trichoides | GB, VC27 East Norfolk, Ingham | James Groves | Allan Octavian Hume Henry & James Groves | 11/8/1897 | SLBI |
| Potamogeton trichoides | GB, VC27 East Norfolk, Ingham | James Groves | | 11/8/1897 | ABS |
| Potamogeton obtusifolius | GB, VC27 East Norfolk, Lessingham | James Groves | Allan Octavian Hume Henry & James Groves | 5/8/1897 | SLBI |
+ | Dryopteris cristata | GB, VC27 East Norfolk, Norwich, Heigham | Henry Groves James Groves | Henry & James Groves | 14/8/1885 | MANCH |
| Potamogeton obtusifolius | GB, VC27 East Norfolk, Palling | James Groves | Allan Octavian Hume Henry & James Groves | 2/8/1897 | SLBI |
| Potamogeton pusillus x trichoides = P. x grovesii | GB, VC27 East Norfolk, Palling | James Groves | Charles Bailey | 11/8/1897 | BIRM |
| Potamogeton trichoides | GB, VC27 East Norfolk, Palling | James Groves | Botanical Exchange Club of The British Isles Augustin Ley Henry & James Groves | 11/8/1897 | BIRM |
| Potamogeton praelongus | GB, VC27 East Norfolk, Potter Heigham | Henry Groves James Groves | Allan Octavian Hume Henry & James Groves | 23/6/1885 | SLBI |
| Potamogeton praelongus | GB, VC27 East Norfolk, Potter Heigham | Henry Groves James Groves | Allan Octavian Hume Henry & James Groves | 23/6/1885 | SLBI |
| Potamogeton compressus | GB, VC27 East Norfolk, Stalham | Henry Groves James Groves | Allan Octavian Hume Henry & James Groves | 10/8/1893 | SLBI |
| Potamogeton friesii | GB, VC27 East Norfolk, Stalham | James Groves | Allan Octavian Hume Henry & James Groves | 12/8/1897 | SLBI |
| Bidens cernua | GB, VC27 East Norfolk, Whitlingham | James Groves | Allan Octavian Hume Frederick Townsend Edward Shearburn Marshall | 29/8/1884 | SLBI |
| Frankenia laevis | GB, VC28 West Norfolk, Burnham Overy | James Groves | Henry & James Groves | 25/7/1902 | SLBI |
| Limonium bellidifolium | GB, VC28 West Norfolk, Burnham Overy | James Groves | Henry & James Groves William Hunt Painter | 25/7/1902 | ABS |
| Limonium bellidifolium | GB, VC28 West Norfolk, Burnham Overy | James Groves | Augustin Ley Henry & James Groves | 25/7/1902 | BIRM |
| Silene noctiflora | GB, VC28 West Norfolk, Holkham | James Groves | Allan Octavian Hume Henry & James Groves | 27/7/1902 | SLBI |
| Silene noctiflora | GB, VC28 West Norfolk, Holkham | James Groves | Allan Octavian Hume Henry & James Groves | 27/7/1902 | SLBI |
| Oenanthe fluviatilis | GB, VC28 West Norfolk, Stiffkey | James Groves | Henry & James Groves | 19/7/1902 | SLBI |
| Scrophularia vernalis | GB, VC28 West Norfolk, Stiffkey | James Groves | Allan Octavian Hume Henry & James Groves | 19/7/1902 | SLBI |
| Scrophularia vernalis | GB, VC28 West Norfolk, Stiffkey | James Groves | Allan Octavian Hume Henry & James Groves | 19/7/1902 | SLBI |
| Scrophularia vernalis | GB, VC28 West Norfolk, Stiffkey | James Groves | Allan Octavian Hume Henry & James Groves | 19/7/1902 | SLBI |
| Limonium bellidifolium | GB, VC28 West Norfolk, Wells | Henry Wemyss Feilden James Groves | Allan Octavian Hume Henry & James Groves | 16/7/1902 | SLBI |
| Limonium bellidifolium | GB, VC28 West Norfolk, Wells | Henry Wemyss Feilden James Groves | Allan Octavian Hume Henry & James Groves | 16/7/1902 | SLBI |