| Mentha aquatica | IE, VCH38 Co. Down, Portaferry | Robert Desmond Meikle | | 22/8/1953 | K |
| Mentha piperita var. piperita | IE, VCH38 Co. Down, Portaferry | Robert Desmond Meikle | | 22/8/1953 | K |
| Mentha suaveolens | IE, VCH38 Co. Down, Portaferry | Robert Desmond Meikle | | 22/8/1953 | K |
| Thymus praecox subsp. arcticus | IE, VCH38 Co. Down, Orlock Point | Coslett Herbert Waddell | Watson Botanical Exchange Club Albert Bruce Jackson Coslett Herbert Waddell | 8/1909 | K |
| Callitriche brutia | IE, VCH38 Co. Down, Holywood | | Benjamin Thompson Lowne jnr | 1850 | K |
| Scleranthus annuus | IE, VCH38 Co. Down, Holywood | Robert Lloyd Praeger | | 8/7/1902 | K |
| Stellaria palustris | IE, VCH38 Co. Down, Downpatrick | Robert Desmond Meikle | | 8/1957 | K |
| Stachys palustris | IE, VCH38 Co. Down, Donaghadee | | William Jackson Hooker | 9/1815 | K |
| Pyrola media | IE, VCH38 Co. Down, Conlig | Robert Desmond Meikle | | 1/7/1947 | K |
| Lamium purpureum var. hybridum | IE, VCH38 Co. Down, Benderg Bay | Robert Desmond Meikle | | 8/1957 | K |
| Stachys arvensis | IE, VCH38 Co. Down, Benderg Bay | Robert Desmond Meikle | | 8/1957 | K |
| Thymus praecox subsp. arcticus | IE, VCH38 Co. Down, Benderg Bay | Robert Desmond Meikle | | 8/1957 | K |
| Callitriche obtusangula | IE, VCH38 Co. Down, Belfast Harbour | | Coslett Herbert Waddell John Innes Horticultural Institute | 7/1904 | K |
| Plantago arenaria | IE, VCH38 Co. Down, Bangor | C A Ussher | | 9/1933 | K |
| Galeopsis tetrahit | IE, VCH38 Co. Down, Ballintaggart | Harry Joseph Riddelsdell | Harry Joseph Riddelsdell | 19/8/1925 | K |
| Callitriche intermedia | IE, VCH38 Co. Down, Aughnadarragh | Coslett Herbert Waddell | Coslett Herbert Waddell John Innes Horticultural Institute | 8/1896 | K |
| Stellaria palustris | IE, VCH38 Co. Down, Ardglass | Robert Lloyd Praeger | | 14/7/1902 | K |
| Lamium purpureum var. hybridum | IE, VCH38 Co. Down | Robert Desmond Meikle | | 8/1957 | K |
| Stellaria palustris | IE, VCH38 Co. Down | Robert Desmond Meikle | | 8/1957 | K |
| Stellaria palustris | IE, VCH38 Co. Down | Robert Desmond Meikle | | 8/1957 | K |
| Teucrium scorodonia | IE, VCH38 Co. Down | Joseph Robert Sealy Stella Ross-Craig | | 29/6/1952 | K |
| Mentha requienii | IE, VCH37 Co. Armagh, Slieve Gullion | J.S.M. Richardson | | 28/10/1928 | K |
| Oenanthe fistulosa | IE, VCH37 Co. Armagh, Lough Neagh | Frank Nigel Hepper | | 7/1950 | K |
| Scutellaria galericulata | IE, VCH37 Co. Armagh, Lough Gullion | William Hancock | William Hancock | 27/6/1866 | K |
| Scutellaria galericulata | IE, VCH37 Co. Armagh, Deryadd | | Frank Nigel Hepper | 7/1950 | K |
| Lycopus europaeus | IE, VCH37 Co. Armagh, Closet River | William Hancock | | 3/9/1864 | K |
| Festuca arundinacea | IE, VCH36 Tyrone, River Blackwater | J. Harron | | 29/7/1972 | K |
| Scutellaria galericulata | IE, VCH36 Tyrone, Killywoolaghan Moss | Frederick Hugh Woodhams Kerr | | 8/9/1936 | K |
| Pyrola media | IE, VCH36 Tyrone, Kildress | Samuel Arthur Brennan | Watson Botanical Exchange Club Coslett Herbert Waddell | 7/1897 | K |
| Glebionis segetum | IE, VCH36 Tyrone, Brookend Townland | Frederick Hugh Woodhams Kerr | | 12/10/1936 | K |
| Scutellaria galericulata | IE, VCH36 Tyrone | Frederick Hugh Woodhams Kerr | | 8/9/1936 | K |
| Plantago maritima | IE, Donegal, Lough Swilly | Bedford | | | K |
| Stachys sylvatica x palustris = S. x ambigua | IE, Donegal, Donegal | William Jackson Hooker | William Jackson Hooker | 7/1815 | K |
| Habenaria viride | IE, VCH35 West Donegal, Lough Kindrum | Garratt Eleanor Mary Christian Isherwood | | 16/6/1956 | K |
| Mentha aquatica | IE, VCH35 West Donegal, Bunbeg | D Saville | | 9/9/1934 | K |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH35 West Donegal, Barton Port | David Charles McClintock | Reading University Job Edward Lousley | 14/8/1957 | K |
| Oenanthe fistulosa | IE, VCH33 Fermanagh, Wattle Bridge | Robert Desmond Meikle | | 10/7/1949 | K |
| Galeopsis bifida | IE, VCH33 Fermanagh, Stonepark | Robert Desmond Meikle | | 17/7/1948 | K |
| Glebionis segetum | IE, VCH33 Fermanagh, Slieve Rushen | Robert Desmond Meikle | | 11/7/1949 | K |
| Teucrium scorodonia | IE, VCH33 Fermanagh, Slieve Rushen | Robert Desmond Meikle | | 11/7/1949 | K |