| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | G Smith William Hunt Painter | | ABS |
| Antirrhinum majus | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Augustin Ley | 29/7/1853 | BIRM |
| Callitriche platycarpa | GB, VC38 Warwickshire, Stoke Heath | Thomas Kirk | George Stephen West Thomas Kirk | 6/1849 | 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 |
| Ceratophyllum demersum | GB, VC38 Warwickshire, Sowe | Thomas Kirk | Donor Unknown | 6/1849 | BIRM |
| Ceratophyllum demersum | GB, VC38 Warwickshire, Sowe | Thomas Kirk | George Stephen West | 6/1849 | BIRM |
| Chenopodium polyspermum | GB, VC38 Warwickshire, Coventry | Thomas Kirk | George Stephen West | 10/1857 | BIRM |
| Chenopodium rubrum | | Thomas Kirk | George Stephen West | 7/1847 | BIRM |
| Epilobium roseum | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Augustin Ley Isaiah Waterloo Nicholson Keys | 8/1853 | BIRM |
+ | Groenlandia densa | GB, VC32 Northamptonshire, River Nene at Muscott Mill | Thomas Kirk | | 8/1849 | BIRM |
| Helleborus viridis subsp. occidentalis | GB, VC38 Warwickshire, Studley | Thomas Kirk | George Stephen West Thomas Kirk | 5/1850 | BIRM |
| Juncus compressus | GB, VC62 North-east Yorkshire, Clifton Ings | Thomas Kirk | George Stephen West | 1861 | BIRM |
| Lamium | GB, VC38 Warwickshire, Allesley | John Gilbert Baker Thomas Kirk | George Stephen West | 5/1853 | BIRM |
| Limosella aquatica | GB, VC38 Warwickshire, Arbury Hall | Thomas Kirk | George Stephen West | 7/1849 | BIRM |
| Myosotis discolor | GB, VC38 Warwickshire, Finham | Thomas Kirk | George Stephen West | 5/1850 | BIRM |
| Narcissus poeticus | GB, VC38 Warwickshire, Fillongley | Thomas Kirk | John Harbord Lewis | 6/1860 | BIRM |
| Nepeta cataria | GB, VC38 Warwickshire, Whitley | | George Stephen West Thomas Kirk | 7/1847 | BIRM |
| Populus alba x tremula = P. x canescens | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Donor Unknown | 5/1855 to 10/1855 | BIRM |
| Potamogeton compressus | GB, VC38 Warwickshire, Arbury Park | Thomas Kirk | George Stephen West | 6/1849 | BIRM |
| Potamogeton compressus | GB, VC38 Warwickshire, Arbury Park | Thomas Kirk | George Stephen West Thomas Kirk | 6/1849 | BIRM |
| Potamogeton densus | GB, VC32 Northamptonshire, River Nene at Muscott Mill | Thomas Kirk | George Stephen West | 8/1849 | BIRM |
| Potamogeton obtusifolius | GB, VC38 Warwickshire, Arbury Park | Thomas Kirk | George Stephen West | 6/1849 | BIRM |
| Potamogeton pectinatus | GB, VC38 Warwickshire, Stoke Heath | John Gilbert Baker Thomas Kirk | George Stephen West | 5/1852 | BIRM |
| Potamogeton polygonifolius | GB, VC38 Warwickshire, Warwick | Thomas Kirk | | | BIRM |
| Salix alba | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Donor Unknown | 4/1854 9/1854 | BIRM |
| Salix cinerea subsp. oleifolia | GB, VC38 Warwickshire, Brownshill Green | 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 fragilis x alba = S. x rubens | GB, VC38 Warwickshire, Brandon | Thomas Kirk | Donor Unknown | 4/1854 to 9/1854 | BIRM |
| Salix pentandra x fragilis = S. x meyeriana | GB, VC40 Shropshire, Shrewsbury Cultivated | Thomas Kirk | Augustin Ley | 6/1853 to 10/1853 | BIRM |
| Salix viminalis x caprea = S. x smithiana | GB, VC38 Warwickshire, Pinley | Thomas Kirk | Donor Unknown | 4/1854 to 9/1854 | BIRM |
| Sanguisorba minor subsp. muricata | GB, VC38 Warwickshire, Kenilworth | John Gilbert Baker Thomas Kirk | George Stephen West | 7/1850 | BIRM |
| Sanguisorba minor subsp. muricata | GB, VC38 Warwickshire, Kenilworth | Thomas Kirk | George Stephen West | 26/6/1853 | BIRM |
| Sanguisorba minor subsp. muricata | GB, VC38 Warwickshire, Kenilworth | | George Stephen West Thomas Kirk | 7/1850 | BIRM |
+ | Thalictrum flavum | GB, VC38 Warwickshire, Warwickshire | John Gilbert Baker Thomas Kirk | | 1898 | BIRM |
| Carex flacca | GB, VC38 Warwickshire, Wyken | Thomas Kirk | Charles Ottley Groom | 31/5/1854 to 7/1855 | BON |
| Elodea canadensis | GB, VC32 Northamptonshire, Watford Locks | Thomas Kirk | Mantua And Montferrat Thomas Kirk | 14/11/1848 | BON |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | Thirsk Natural History Society Mantua And Montferrat | 9/1858 | BON |
| Potamogeton natans x gramineus = P. x sparganiifolius | IE, VCH16,VCH17, Lough Corrib | Thomas Kirk | Botanical Exchange Club of the Thirsk Natural History Society Mantua And Montferrat | | BON |
| Sparganium natans | GB, VC37 Worcestershire, Asbury Hall | Thomas Kirk | Charles Ottley Groom | 7/1854 | BON |