 | Polygonum rurivagum | GB, VC85 Fifeshire, Kinghorn Loch | John Thomas Irvine Boswell-Syme | Allan Octavian Hume Frederick Townsend | 10/1871 | SLBI |
 | Potamogeton filiformis | GB, VC85 Fifeshire, Camilla Loch | John Thomas Irvine Boswell-Syme | | 8/1872 | SLBI |
 | Potamogeton filiformis | GB, VC87 West Perthshire, Loch Leven | Frederick Janson Hanbury John Thomas Irvine Boswell-Syme | | 7/1870 | SLBI |
 | Potamogeton gramineus | GB, VC111 Orkney, Loch of Kirbister | John Thomas Irvine Boswell-Syme | Allan Octavian Hume Arthur Bennett | 7/1875 | SLBI |
 | Potamogeton gramineus x perfoliatus = P. x nitens | GB, VC88 Mid Perthshire, River Tay | John Thomas Irvine Boswell-Syme | William Hadden Beeby William R Hayward | 7/1870 | SLBI |
 | Potamogeton lucens x gramineus = P. x angustifolius | GB, VC85 Fifeshire, Kinghorn Loch | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 1873 | SLBI |
 | Potamogeton pectinatus | GB, VC111 Orkney, Loch of Kirbister | John Thomas Irvine Boswell-Syme | Botanical Society & Exchange Club of The British Isles Allan Octavian Hume Frederick Townsend | 8/1880 | SLBI |
 | Potamogeton praelongus | GB, VC85 Fifeshire, Kinghorn Loch | John Thomas Irvine Boswell-Syme | | 7/1872 | SLBI |
 | Primula scotica | GB, VC111 Orkney, Houton | John Thomas Irvine Boswell-Syme | | 8/1874 | SLBI |
 | Pyrola minor | GB, VC91 Kincardineshire, Kingcausie | John Thomas Irvine Boswell-Syme | John Thomas Irvine Boswell-Syme | 7/1850 | SLBI |
 | Ranunculus fluitans | GB, VC26 West Suffolk, Mildenhall | John Thomas Irvine Boswell-Syme | | 6/1850 | SLBI |
 | Ranunculus reptans | GB, VC85 Fifeshire, Loch Leven National Nature Reserve | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 1/8/1870 9/1874 | SLBI |
 | Rosa | GB, VC85 Fifeshire, Balmuto Cultivated | John Thomas Irvine Boswell-Syme | | 1873 | SLBI |
 | Rubus cardiophyllus | GB, VC85 Fifeshire, Balmerino | John Thomas Irvine Boswell-Syme | John Thomas Irvine Boswell-Syme | 10/1873 | SLBI |
 | Rubus leptothyrsos | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | | 10/1872 | SLBI |
 | Rubus lindebergii | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | | 10/1873 | SLBI |
 | Rubus mucronulatus | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | | 1872 | SLBI |
 | Rubus scissus | GB, VC88 Mid Perthshire, Breadalbane Mountains | John Thomas Irvine Boswell-Syme | William Hadden Beeby Andrew Bloxam John Thomas Irvine Boswell-Syme | 8/1851 | SLBI |
 | Rumex conglomeratus x pulcher = R. x muretii | GB, VC2 East Cornwall, Torpoint GB, VC85 Fifeshire, Balmuto Cultivated | John Thomas Irvine Boswell-Syme | Botanical Exchange Club of The British Isles William Hadden Beeby | 9/1879 | SLBI |
 | Rumex crispus | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | | 8/1874 | SLBI |
 | Rumex crispus | GB, VC111 Orkney, Swanbister | John Thomas Irvine Boswell-Syme | | 8/1873 | SLBI |
 | Rumex crispus x obtusifolius = R. x pratensis | GB, VC85 Fifeshire, Invertiel | John Thomas Irvine Boswell-Syme | | 8/1873 | SLBI |
 | Rumex longifolius | GB, VC85 Fifeshire, Cowdenbeath | John Thomas Irvine Boswell-Syme | | 1873 | SLBI |
 | Rumex longifolius x obtusifolius = R. x hybridus | GB, VC87 West Perthshire, Kinross | John Thomas Irvine Boswell-Syme | John Thomas Irvine Boswell-Syme | 8/1874 | SLBI |
 | Rumex obtusifolius | GB, VC85 Fifeshire, Invertiel | John Thomas Irvine Boswell-Syme | | 9/1874 | SLBI |
 | Ruppia rostellata | GB, VC111 Orkney, Oyce of Firth | John Thomas Irvine Boswell-Syme | Botanical Exchange Club of The British Isles Allan Octavian Hume Frederick Townsend | 8/1880 | SLBI |
 | Salix bakeri | GB, VC85 Fifeshire, Balmuto Cultivated | John Thomas Irvine Boswell-Syme | William Hadden Beeby John Ewbank Leefe | 8/1877 | SLBI |
 | Senecio vulgaris | GB, VC85 Fifeshire, Balmuto Cultivated IE, Cork, Cork | John Thomas Irvine Boswell-Syme | | 5/1878 | SLBI |
 | Sorbus arranensis | GB, VC100 Clyde Islands, Lochranza | John Thomas Irvine Boswell-Syme | Allan Octavian Hume Frederick Townsend | 6/1872 | SLBI |
 | Sorbus aucuparia x intermedia | GB, VC100 Clyde Islands, Glen Catacol | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 6/1872 | SLBI |
 | Stellaria neglecta | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | Croydon Natural History and Scientific Society Arthur Bennett | | SLBI |
 | Stellaria neglecta | GB, VC85 Fifeshire, Balmuto,Pirniss Wood | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 5/1872 5/1874 | SLBI |
 | Symphytum tuberosum | GB, VC83 Midlothian, Edinburgh,Inveresk | John Thomas Irvine Boswell-Syme | Frederick Townsend | 6/1871 | SLBI |
 | Trifolium agrarium | GB, VC85 Fifeshire, Balmuto | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 8/1883 | SLBI |
 | Vaccinium oxycoccos | GB, VC85 Fifeshire, Cowdenbeath, Moss Morran | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 6/1869 | SLBI |
 | Valeriana pyrenaica | GB, VC88 Mid Perthshire, Blair Atholl | John Thomas Irvine Boswell-Syme | William Hadden Beeby | 7/1873 | SLBI |
 | Viola hirta subsp. calcarea | GB, VC29 Cambridgeshire, Gog Magog Hills | Frederick Townsend | John Thomas Irvine Boswell-Syme William Hadden Beeby | 4/1847 | SLBI |
 | Zannichellia polycarpa | GB, VC111 Orkney, Loch of Kirbister | John Thomas Irvine Boswell-Syme | Botanical Exchange Club of The British Isles Allan Octavian Hume Frederick Townsend | 8/1880 | SLBI |
 | Zostera noltei | GB, VC85 Fifeshire, Burntisland | John Thomas Irvine Boswell-Syme | | 3/1874 | SLBI |
+ | Carex curta | GB, VC88 Mid Perthshire, Ben Lawers | John Thomas Irvine Boswell-Syme | | 8/1877 | PTH |