| Inula salicina | IE, Ambiguous locality (IE), Shannon | C W Davidson | William Hadden Beeby | 7/1876 | SLBI |
| Dryas octopetala | IE, Ambiguous locality (IE), Knockmore | | William Nichols Tetley | 28/6/1901 | SLBI |
| Arbutus unedo | IE, Ambiguous locality (IE), Killarney | Thresh | C E Robinson | 1/9/1888 | SLBI |
| Senecio aquaticus | IE, Ambiguous locality (IE), Killarney | Frederick Townsend | Frederick Townsend | | SLBI |
| Sparganium minimum | IE, Ambiguous locality (IE), Killarney | Henry Chichester Hart | William Hadden Beeby | 1885 | SLBI |
| Fagopyrum esculentum | IE, Ambiguous locality (IE), Gallows Hill | Arthur William Graveson | Arthur William Graveson | 2/9/1929 | SLBI |
| Sagina subulata | IE, Ambiguous locality (IE), Fair Head | Isaac A Helsby | Isaac A Helsby | 28/8/1928 | SLBI |
| Veronica scutellata | IE, Ambiguous locality (IE), Derry | | Croydon Natural History and Scientific Society John Joseph Bennett Robert Russell Hutchinson | 1835 | SLBI |
| Pyrola minor | IE, Ambiguous locality (IE), Carricknagower | William Nichols Tetley | William Nichols Tetley | 21/7/1906 | SLBI |
| Saxifraga hypnoides | IE, Ambiguous locality (IE), Carrick | Joseph Woods | Allan Octavian Hume | 20/7/1855 | SLBI |
| Draba muralis | IE, VCH40 Co. Londonderry, Umbra | Coslett Herbert Waddell Henry William Lett | Alfred Loydell William Robert Sherrin | 1905 | SLBI |
| Rubus anisacanthos | IE, VCH40 Co. Londonderry, Portrush | Charles Bailey | | 14/7/1896 | SLBI |
| Viola lutea | IE, VCH40 Co. Londonderry, Magilligan point | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 5/1904 | SLBI |
| Spiranthes romanzoffiana | IE, VCH40 Co. Londonderry, Kilrea | Robert Lloyd Praeger | Allan Octavian Hume | 1/7/1895 | SLBI |
| Rubus pascuorum | IE, VCH40 Co. Londonderry, Carnabridge | Charles Bailey | Botanical Exchange Club of The British Isles Allan Octavian Hume | 14/7/1896 | SLBI |
| Rosa mollis | IE, VCH39 Co. Antrim, Whitewell, Belfast | Coslett Herbert Waddell | | 24/7/1896 | SLBI |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | Samuel Alexander Stewart | | 10/8/1894 | SLBI |
| Potamogeton perfoliatus x crispus = P. x cooperi | IE, VCH39 Co. Antrim, Templepatrick | | | | SLBI |
| Spiranthes romanzoffiana | IE, VCH39 Co. Antrim, Staffordstown | Stendall | Isaac A Helsby | 30/7/1929 | SLBI |
| Potamogeton praelongus | IE, VCH39 Co. Antrim, Sixmile River | Samuel Alexander Stewart | Arthur Bennett | 8/1894 | SLBI |
| Hieracium basalticola | IE, VCH39 Co. Antrim, Sallagh Braes | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby | 15/6/1890 | SLBI |
| Hieracium basalticola | IE, VCH39 Co. Antrim, Sallagh Braes | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Frederick Townsend | 15/6/1890 | SLBI |
| Polygonum oxyspermum | IE, VCH39 Co. Antrim, Red Bay | Charles Cardale Babington | Frederick Townsend | 10/9/1852 | SLBI |
| Rosa spinosissima | IE, VCH39 Co. Antrim, Portrush | Isaac A Helsby | Isaac A Helsby | 8/1929 | SLBI |
| Rubus anisacanthos | IE, VCH39 Co. Antrim, Portrush | Charles Bailey | Botanical Exchange Club of The British Isles Allan Octavian Hume | 14/7/1896 | SLBI |
| Sagina apetala | IE, VCH39 Co. Antrim, Portrush | Isaac A Helsby | Isaac A Helsby | 8/1929 | SLBI |
| Sagina nodosa | IE, VCH39 Co. Antrim, Portrush | Isaac A Helsby | Isaac A Helsby | 8/1928 | SLBI |
| Salix repens | IE, VCH39 Co. Antrim, Portrush | Isaac A Helsby | Isaac A Helsby | 8/1928 | SLBI |
| Thalictrum minus | IE, VCH39 Co. Antrim, Portrush | Charles Cardale Babington | Allan Octavian Hume Charles Cardale Babington Frederick Townsend | 18/9/1852 | SLBI |
| Viola | IE, VCH39 Co. Antrim, Portrush | Isaac A Helsby | Isaac A Helsby | 27/8/1928 | SLBI |
| Viola curtisii | IE, VCH39 Co. Antrim, Portrush | Charles Bailey | Botanical Exchange Club of The British Isles Allan Octavian Hume | 15/7/1896 | SLBI |
| Viola pesneaui | IE, VCH39 Co. Antrim, Portrush | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 27/8/1928 | SLBI |
| Carex fusca | IE, VCH39 Co. Antrim, Lough Neagh | Joseph Woods | Allan Octavian Hume Frederick Townsend | 27/6/1840 | SLBI |
| Elatine hydropiper | IE, VCH39 Co. Antrim, Lough Beg | W J Sayers | Isaac A Helsby | | SLBI |
| Alchemilla alpina | IE, VCH39 Co. Antrim, Larne | William Robert Sherrin | | 8/1928 | SLBI |
| Anagallis arvensis | IE, VCH39 Co. Antrim, Larne | Mary Louisa Wedgwood | Job Edward Lousley | 12/7/1930 | SLBI |
| Fumaria bastardii | IE, VCH39 Co. Antrim, Larne | William Robert Sherrin | William Robert Sherrin | | SLBI |
| Fumaria densiflora | IE, VCH39 Co. Antrim, Larne | William Robert Sherrin | | 8/1928 | SLBI |
| Fumaria officinalis | IE, VCH39 Co. Antrim, Larne | William Robert Sherrin | | 8/1928 | SLBI |
| Fumaria purpurea | IE, VCH39 Co. Antrim, Larne | William Robert Sherrin | | 8/1928 | SLBI |