| Elodea canadensis | GB, VC32 Northamptonshire, Watford Locks | Thomas Kirk | John Ball | 11/1848 | E |
| Potamogeton filiformis | GB, VC38 Warwickshire, Stoke Heath | Thomas Kirk | William Hadden Beeby | | SLBI |
+ | Groenlandia densa | GB, VC32 Northamptonshire, River Nene at Muscott Mill | Thomas Kirk | | 8/1849 | BIRM |
| Potamogeton polygonifolius | GB, VC38 Warwickshire, Warwick | Thomas Kirk | | | BIRM |
| Potamogeton natans x gramineus = P. x sparganiifolius | IE, VCH16 West Galway, Maam | | Thomas Kirk | 9/1858 | E |
| Sparganium natans | GB, VC37 Worcestershire, Asbury Hall | Thomas Kirk | Charles Ottley Groom | 7/1854 | BON |
| Carex flacca | GB, VC38 Warwickshire, Wyken | Thomas Kirk | Charles Ottley Groom | 31/5/1854 to 7/1855 | BON |
| Salix viminalis x caprea = S. x smithiana | GB, VC38 Warwickshire, Wyken | Thomas Kirk | IRGMA | 25/4/1853 19/9/1853 | LIV |
| Elodea canadensis | GB, VC32 Northamptonshire, Watford | Thomas Kirk | | 1849 | E |
| Elodea canadensis | GB, VC32 Northamptonshire, Watford Locks | Thomas Kirk | Mantua And Montferrat Thomas Kirk | 14/11/1848 | BON |
| Elodea canadensis | GB, VC32 Northamptonshire, Watford Locks | Thomas Kirk | | 11/8/1849 | E |
| Elodea canadensis | GB, VC38 Warwickshire, Sowe Waste, Coventry | Thomas Kirk | | | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | Thirsk Natural History Society Mantua And Montferrat | 9/1858 | BON |
| Scheuchzeria palustris | GB, VC62 North-east Yorkshire, Thirsk | | Thomas Kirk | | E |
| Potamogeton filiformis | GB, Ambiguous locality (GB), Longford | Thomas Kirk | | | SLBI |
| Potamogeton filiformis | GB, Ambiguous locality (GB), Longford | Thomas Kirk | | 16/8/1853 | SLBI |
| Potamogeton gramineus | IE, VCH16,VCH17, Lough Corrib IE, VCH18 Offaly, Oughter | | Thomas Kirk | 8/1858 | E |
| Narcissus poeticus | GB, VC38 Warwickshire, Fillongley | Thomas Kirk | John Harbord Lewis | 6/1860 | BIRM |
| Antirrhinum majus | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Augustin Ley | 29/7/1853 | BIRM |
| Epilobium roseum | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Augustin Ley Isaiah Waterloo Nicholson Keys | 8/1853 | BIRM |
| Salix pentandra x fragilis = S. x meyeriana | GB, VC40 Shropshire, Shrewsbury Cultivated | Thomas Kirk | Augustin Ley | 6/1853 to 10/1853 | BIRM |
| Calluna vulgaris | GB, VC49 Caernarvonshire, Bwlch yr Haiarn | Thomas Kirk | Augustin Ley | 9/1849 | BIRM |
| Camelina sativa | IE, VCH16,VCH17, Galway | Thomas Kirk | Augustin Ley | 5/9/1853 | BIRM |
| Salix fragilis x alba = S. x rubens | GB, VC38 Warwickshire, Brandon | Thomas Kirk | Donor Unknown | 4/1854 to 9/1854 | BIRM |
| Salix alba | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Donor Unknown | 4/1854 9/1854 | BIRM |
| Salix fragilis var. russelliana | GB, VC38 Warwickshire, Pinley | Thomas Kirk | Donor Unknown | 4/1854 to 9/1854 | BIRM |
| Salix viminalis x caprea = S. x smithiana | GB, VC38 Warwickshire, Pinley | Thomas Kirk | Donor Unknown | 4/1854 to 9/1854 | BIRM |
| Carex divulsa | GB, VC23 Oxfordshire, Cumnor | | Patrick Neill Fraser Thomas Kirk | 7/1860 | E |
| Carex paniculata | GB, VC38 Warwickshire, Binley | | Patrick Neill Fraser Thomas Kirk | 7/1858 | E |
| Carex muricata | GB, VC38 Warwickshire, Brandon | | Patrick Neill Fraser Thomas Kirk | 9/1839 | E |
| Carex muricata | GB, VC38 Warwickshire, Finham | Thomas Kirk | Patrick Neill Fraser Thomas Kirk | | E |
| Carex pseudocyperus | GB, VC38 Warwickshire, Stoke Aldmoor | Patrick Neill Fraser | Thomas Kirk | 8/1859 | E |
| Carex strigosa | GB, VC58 Cheshire, Cotterill Clough | George Edward Hunt | Patrick Neill Fraser Thomas Kirk | 7/1857 | E |
| Carex diandra | GB, VC58 Cheshire, Seaman's Moss | G E Horne | Patrick Neill Fraser Thomas Kirk | | E |
| Carex appropinquata | GB, VC64 Mid-west Yorkshire, Askham Bog | Patrick Neill Fraser | Thomas Kirk | | E |
| Carex lasiocarpa | GB, VC67 South Northumberland, Barron House Bog | | Patrick Neill Fraser Thomas Kirk | 6/1853 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | G Smith William Hunt Painter | | ABS |
| Salix fragilis x triandra = S. x alopecuroides | GB, VC38 Warwickshire, Quinton Pool | Thomas Kirk | IRGMA | 4/1849 10/1852 | LIV |
| Carex rostrata | GB, VC38 Warwickshire, Whitmore Park | Thomas Kirk | Fleming Society John Sadler | 7/1855 | E |
| Callitriche platycarpa | GB, VC38 Warwickshire, Stoke Heath | Thomas Kirk | George Stephen West Thomas Kirk | 6/1849 | BIRM |