| Elatine hydropiper | IE, VCH39 Co. Antrim, Lagan Canal | William Mateer | Allan Octavian Hume William Mateer | 8/1847 | SLBI |
| Tripleurospermum maritimum | IE, VCH39 Co. Antrim, Island Magee | William Robert Sherrin | | 8/1928 | SLBI |
| Campanula rotundifolia | IE, VCH39 Co. Antrim, Giants Causeway | Isaac A Helsby | Isaac A Helsby | 8/1928 | SLBI |
| Carum verticillatum | IE, VCH39 Co. Antrim, Giants Causeway | Isaac A Helsby | Isaac A Helsby | 27/8/1928 | SLBI |
| Chrysanthemum segetum | IE, VCH39 Co. Antrim, Giants Causeway | Isaac A Helsby | Isaac A Helsby | 8/1928 | SLBI |
| Mertensia maritima | IE, VCH39 Co. Antrim, Giants Causeway | Isaac A Helsby | Isaac A Helsby | 8/1923 | SLBI |
| Rubus polyanthemus | IE, VCH39 Co. Antrim, Giants Causeway | Charles Bailey | Allan Octavian Hume | 13/7/1896 | SLBI |
| Tripleurospermum inodorum | IE, VCH39 Co. Antrim, Giants Causeway | Isaac A Helsby | Isaac A Helsby | 8/1928 | SLBI |
| Pinguicula lusitanica | IE, VCH39 Co. Antrim, Fair Head | Stafford Edwin Chandler | Croydon Natural History and Scientific Society Stafford Edwin Chandler | 2/8/1938 | SLBI |
| Utricularia minor | IE, VCH39 Co. Antrim, Fair Head | Isaac A Helsby | Isaac A Helsby | 23/8/1928 | SLBI |
| Viola reichenbachiana | IE, VCH39 Co. Antrim, Edenderry | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell Hugh Neville Dixon Leslie Beeching Hall | 4/4/1904 | SLBI |
| Rubus pruinosus | IE, VCH39 Co. Antrim, Drumnadarragh | John Patrick Micklethwait Brenan Norman Douglas Simpson | | 17/8/1939 | SLBI |
| Rubus pruinosus | IE, VCH39 Co. Antrim, Drumnadarragh | John Patrick Micklethwait Brenan Norman Douglas Simpson | William Charles Richard Watson | 17/8/1939 | SLBI |
| Populus balsamifera | IE, VCH39 Co. Antrim, Derriaghy | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 26/8/1925 | SLBI |
| Rubus lettii | IE, VCH39 Co. Antrim, Crumlin | John Patrick Micklethwait Brenan Norman Douglas Simpson | Norman Douglas Simpson | 16/8/1939 | SLBI |
| Hieracium latobrigorum | IE, VCH39 Co. Antrim, Cranfield | Samuel Alexander Stewart | | 27/7/1890 | SLBI |
| Euphrasia micrantha | IE, VCH39 Co. Antrim, Colin Top | Ida Mary Roper | Botanical Exchange Club of The British Isles Ida Mary Roper | 29/8/1928 | SLBI |
| Alchemilla glabra | IE, VCH39 Co. Antrim, Cave Hill | M F Wedgwood | Job Edward Lousley | 22/6/1930 | SLBI |
| Crepis paludosa | IE, VCH39 Co. Antrim, Belfast,Colin Glen | Isaac A Helsby | Isaac A Helsby | 29/8/1928 | SLBI |
| Pilosella caespitosa x lactucella = P. x floribunda | IE, VCH39 Co. Antrim, Belfast, Cave Hill Cultivated | Coslett Herbert Waddell | Botanical Exchange Club of The British Isles Allan Octavian Hume Coslett Herbert Waddell | 8/1900 | SLBI |
| Fumaria purpurea | IE, VCH39 Co. Antrim, Belfast | James Walter White | Watson Botanical Exchange Club | 24/8/1924 | SLBI |
| Mentha longifolia | IE, VCH39 Co. Antrim, Belfast | James Walter White | Watson Botanical Exchange Club James Walter White | 2/8/1927 | SLBI |
| Mentha spicata | IE, VCH39 Co. Antrim, Belfast | James Walter White | Botanical Exchange Club of The British Isles James Walter White Job Edward Lousley | 2/8/1927 | SLBI |
| Potentilla anglica | IE, VCH39 Co. Antrim, Belfast | Samuel Alexander Stewart | | 7/1893 | SLBI |
| Rosa mollis | IE, VCH39 Co. Antrim, Belfast | Richard Vercoe Tellam | | 8/1869 | SLBI |
| Rosa spinosissima x canina = R. x hibernica | IE, VCH39 Co. Antrim, Belfast | | | | SLBI |
| Rosa spinosissima x canina = R. x hibernica | IE, VCH39 Co. Antrim, Belfast | Samuel Alexander Stewart | | 12/7/1875 | SLBI |
| Senecio jacobaea | IE, VCH39 Co. Antrim, Belfast | James Walter White | Watson Botanical Exchange Club | 27/7/1926 | SLBI |
| Orobanche rubra | IE, VCH39 Co. Antrim, Ballycastle | Stafford Edwin Chandler | Croydon Natural History and Scientific Society Stafford Edwin Chandler | 29/7/1938 | SLBI |
| Sagina ciliata | IE, VCH39 Co. Antrim, Ballycastle | Charles Cardale Babington | Charles Cardale Babington | 15/9/1852 | SLBI |
| Blysmus rufus | IE, VCH39 Co. Antrim, Ballintoy | Stafford Edwin Chandler | Croydon Natural History and Scientific Society | 30/8/1938 | SLBI |
| Viola tricolor subsp. curtisii | IE, VCH39 Co. Antrim, Antrim | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby John Gilbert Baker | 25/6/1886 | SLBI |
| Rubus polyanthemus | IE, VCH39 Co. Antrim, Aird | Charles Bailey | Botanical Exchange Club of The British Isles Allan Octavian Hume | 13/7/1896 | SLBI |
| Rosa spinosissima x canina = R. x hibernica | IE, VCH38 Co. Down, Tillysburn | Coslett Herbert Waddell | Coslett Herbert Waddell | 15/6/1896 to 24/7/1896 | SLBI |
| Pinguicula lusitanica | IE, VCH38 Co. Down, Slieve Donard | Isaac A Helsby | Isaac A Helsby | 31/8/1928 | SLBI |
| Rubus boudiccae | IE, VCH38 Co. Down, Shankill | Henry William Lett | Allan Octavian Hume | 7/8/1897 | SLBI |
| Rubus cardiophyllus | IE, VCH38 Co. Down, Shankill | Henry William Lett | Allan Octavian Hume | 7/8/1897 | SLBI |
| Hieracium sect. Hieracium | IE, VCH38 Co. Down, Saintfield, Rowallane | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 12/7/1904 | SLBI |
| Rubus lettii | IE, VCH38 Co. Down, Saintfield Vicarage | Coslett Herbert Waddell | Coslett Herbert Waddell William Moyle Rogers | 12/8/1898 | SLBI |
| Barbarea intermedia | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 6/1905 | SLBI |