| Carex pendula | | Thomas Bates Blow | Thomas Bates Blow | 6/1873 | E |
| Carex arenaria | IE, Ambiguous locality (IE), Mullaghmore | | John Thomas Irvine Boswell-Syme | 7/1840 | E |
| Carex arenaria | IE, Ambiguous locality (IE), Mullaghmore | | John Thomas Irvine Boswell-Syme | 7/1840 | E |
| Carex panicea | IE, VCH40 Co. Londonderry, Mount Benevenagh | John Ball | | 1837 | E |
| Carex vesicaria | IE, VCH40 Co. Londonderry, Lough Neagh | John Harron | | 5/1970 | E |
| Carex disticha | IE, VCH39 Co. Antrim, Shanes Castle | Nicholas F Stewart | Alexander Somerville | 7/7/1891 | E |
| Carex riparia | IE, VCH39 Co. Antrim, Sandy Bay | Clara Winsome Muirhead Mary Patricia Happer Kertland Ursula Katherine Duncan | | 11/6/1955 | E |
+ | Impatiens glandulifera | IE, VCH39 Co. Antrim, Lough Neagh at mouth of Six Mile Water | R B Knox | | 8/8/1957 | E |
| Carex elongata | IE, VCH39 Co. Antrim, Lough Neagh | David Moore | | 6/1840 | E |
| Carex elongata | IE, VCH39 Co. Antrim, Lough Neagh | David Moore | Alexander Somerville Foote | | E |
| Carex elongata | IE, VCH39 Co. Antrim, Lough Neagh | David Moore | Robert Kaye Greville | 1840 | E |
| Carex lasiocarpa | IE, VCH39 Co. Antrim, Lough Neagh | D Moore | | 6/1840 | E |
| Carex strigosa | IE, VCH39 Co. Antrim, Lough Neagh | John Harron | | 5/1970 | E |
| Potamogeton natans x gramineus = P. x sparganiifolius | IE, VCH39 Co. Antrim, Lough Neagh | D Moore | | | E |
| Scrophularia auriculata | IE, VCH39 Co. Antrim, Four Mile Burn | Samuel Alexander Stewart | Alexander Somerville | 22/7/1883 | E |
| Carex canescens | IE, VCH39 Co. Antrim, Belfast Botanic Garden Cultivated | | University of Glasgow T C Booth | 10/7/1849 | E |
| Carex flacca | IE, VCH39 Co. Antrim, Belfast | John Ball | | 8/1837 | E |
| Carex otrubae | IE, VCH39 Co. Antrim, Belfast | John Ball | John Ball | 8/1837 | E |
| Carex remota | IE, VCH39 Co. Antrim, Belfast Cultivated | | | 10/7/1849 | E |
| Carex laevigata | IE, VCH39 Co. Antrim, Antrim | William Jackson Hooker | William Jackson Hooker | 1838 | E |
| Carex diandra | IE, VCH39 Co. Antrim | David Moore | | 7/1839 | E |
| Potamogeton gramineus | IE, VCH38 Co. Down, Downpatrick | Christopher David Preston Paul Hackney R Forbes R Weyl | Cambridge University | 16/8/1987 | E |
| Carex canescens | IE, VCH37 Co. Armagh, Slieve Gullion | John Harron | | 14/6/1970 | E |
| Carex rostrata | IE, VCH37 Co. Armagh, Loughgilly | Henry William Lett | Watson Botanical Exchange Club Henry William Lett | 15/6/1895 | E |
| Carex echinata | IE, VCH37 Co. Armagh, Camlough | John Harron | | 13/6/1970 | E |
| Carex binervis | IE, VCH36 Tyrone, Cornamuck | Robert MacKechnie | Robert MacKechnie | 3/7/1958 | E |
| Carex diandra | IE, VCH36 Tyrone, Clogher | Robert MacKechnie | Robert MacKechnie | 7/7/1949 | E |
| Carex disticha | IE, VCH36 Tyrone, Clogher | Robert MacKechnie | Robert MacKechnie | 7/7/1949 | E |
| Carex otrubae | IE, Donegal, Donegal Harbour | R B Knox | | 1/8/1957 | E |
| Carex remota | IE, Donegal, Donegal Harbour | R B Knox | | 1/8/1957 | E |
| Carex lasiocarpa | IE, VCH35 West Donegal, The Rosses | Ursula Katherine Duncan | | 14/6/1955 | E |
| Carex lasiocarpa | IE, VCH35 West Donegal, Mullaghderg Lough | Arthur Wilson Stelfox | | 15/6/1955 | E |
| Potamogeton gramineus | IE, VCH35 West Donegal, Mullaghderg Lough | Clara Winsome Muirhead | | 14/6/1955 | E |
| Baldellia ranunculoides | IE, VCH35 West Donegal, Melmore Head | Douglas Mackay Henderson | | 15/8/1963 | E |
| Carex flacca | IE, VCH35 West Donegal, Inver Bay | R B Knox | | 28/7/1957 | E |
| Carex hirta | IE, VCH35 West Donegal, Fintra Bay | | | 16/6/1899 | E |
| Carex otrubae | IE, VCH35 West Donegal, Dunfanaghy | Clara Winsome Muirhead | | 18/6/1955 | E |
| Baldellia ranunculoides | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | | 8/8/1939 | E |
| Potamogeton lucens | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | Robert MacKechnie | 11/7/1949 | E |
| Baldellia ranunculoides | IE, VCH33 Fermanagh, Lough Bresk | Robert MacKechnie | | 7/8/1939 | E |