| Potamogeton gramineus | IE, VCH16,VCH17, Lough Corrib IE, VCH18 Offaly, Oughter | | Thomas Kirk | 8/1858 | E |
| Potamogeton gramineus | IE, VCH16,VCH17, Lough Corrib | Thomas Kirk | Allan Octavian Hume Frederick Townsend | 7/9/1853 | SLBI |
| Potamogeton gramineus | IE, VCH16,VCH26, Lough Corrib | Thomas Kirk | Allan Octavian Hume Frederick Townsend | 7/9/1853 | SLBI |
| Potamogeton gramineus | IE, VCH16 West Galway, Lough Corrib | Thomas Kirk | Allan Octavian Hume Frederick Townsend | 7/9/1853 | SLBI |
+ | Potamogeton friesii | GB, VC38 Warwickshire, Warwick,Stoke Heath | Thomas Kirk | Charles Bailey | 7/1856 | MANCH |
| Potamogeton filiformis | GB, VC38 Warwickshire, Stoke Heath | Thomas Kirk | William Hadden Beeby | | SLBI |
| Potamogeton filiformis | GB, Ambiguous locality (GB), Longford | Thomas Kirk | | 16/8/1853 | SLBI |
| Potamogeton filiformis | GB, Ambiguous locality (GB), Longford | Thomas Kirk | | | SLBI |
| Potamogeton densus | GB, VC32 Northamptonshire, River Nene at Muscott Mill | Thomas Kirk | George Stephen West | 8/1849 | 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 compressus | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Charles Bailey John Harbord Lewis | 6/1860 | MANCH |
+ | Potamogeton compressus | GB, VC38 Warwickshire, Warwick,Stoke Heath | Thomas Kirk | Charles Bailey John Harbord Lewis | | MANCH |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | Botanical Exchange Club of the Thirsk Natural History Society Charles Bailey John Ray Hardy | 9/1858 | MANCH |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | Thirsk Natural History Society Mantua And Montferrat | 9/1858 | BON |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | Thomas Kirk | G Smith William Hunt Painter | | ABS |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Bodafon | | Thomas Kirk | 9/1858 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | GB, VC52 Anglesey, Lligwy | Thomas Kirk | | 9/1858 | E |
| Potamogeton alpinus | GB, VC38 Warwickshire, Arbury Park | Thomas Kirk | Charles Bailey John Harbord Lewis | 9/1849 | MANCH |
+ | Potamogeton acutifolius | GB, VC27 East Norfolk, nr Norwich,Heigham | Thomas Kirk | Charles Bailey John Harbord Lewis | 4/9/1857 | MANCH |
| Populus alba x tremula = P. x canescens | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Donor Unknown | 5/1855 to 10/1855 | BIRM |
+ | Platanthera chlorantha | GB, VC38 Warwickshire, Fillongley | Thomas Kirk | Charles Bailey | 7/1854 | MANCH |
| Nepeta cataria | GB, VC38 Warwickshire, Whitley | | George Stephen West Thomas Kirk | 7/1847 | BIRM |
| Narcissus poeticus | GB, VC38 Warwickshire, Fillongley | Thomas Kirk | John Harbord Lewis | 6/1860 | BIRM |
+ | Myriophyllum verticillatum | GB, VC38 Warwickshire | Thomas Kirk | Charles Bailey William Lowndes Notcutt | 1847 | MANCH |
| Myosotis discolor | GB, VC38 Warwickshire, Finham | Thomas Kirk | George Stephen West | 5/1850 | BIRM |
| Limosella aquatica | GB, VC38 Warwickshire, Arbury Hall | Thomas Kirk | George Stephen West | 7/1849 | BIRM |
| Lamium | GB, VC38 Warwickshire, Allesley | John Gilbert Baker Thomas Kirk | George Stephen West | 5/1853 | BIRM |
+ | Lactuca saligna | GB, VC16 West Kent, Woolwich | Thomas Kirk | John Hutton Balfour | 1862 | PTH |
| Juncus compressus | GB, VC62 North-east Yorkshire, Clifton Ings | Thomas Kirk | George Stephen West | 1861 | BIRM |
| Hieracium umbellatum | GB, VC38 Warwickshire, Binley | Thomas Kirk | Frederick Townsend | 7/1854 | SLBI |
| Helleborus viridis subsp. occidentalis | GB, VC38 Warwickshire, Studley | Thomas Kirk | George Stephen West Thomas Kirk | 5/1850 | BIRM |
+ | Groenlandia densa | GB, VC32 Northamptonshire, River Nene at Muscott Mill | Thomas Kirk | | 8/1849 | BIRM |
+ | Filago vulgaris | GB, VC38 Warwickshire | Thomas Kirk | Charles Bailey | 8/1856 | MANCH |
+ | Equisetum hyemale x ramosissimum = E. x moorei | IE, VCH20 Co. Wicklow, Rockfield | Thomas Kirk | Charles Bailey | 9/1838 | MANCH |
+ | Equisetum hyemale x ramosissimum = E. x moorei | IE, VCH20 Co. Wicklow, Rockfield | Thomas Kirk | Hewett Cottrell Watson | 9/1858 | MANCH |
| Epipactis helleborine | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Charles Bailey | 6/1856 | MANCH |
| Epipactis helleborine | GB, VC38 Warwickshire, Kenilworth | Thomas Kirk | Charles Bailey | | MANCH |
| Epipactis helleborine | GB, VC38 Warwickshire, Weston under Wetherley | Thomas Kirk | Charles Bailey William Lowndes Notcutt | 8/1854 | MANCH |
| Epilobium roseum | GB, VC38 Warwickshire, Coventry | Thomas Kirk | Augustin Ley Isaiah Waterloo Nicholson Keys | 8/1853 | BIRM |