| 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 |
| Baldellia ranunculoides | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | | 8/8/1939 | E |
| Festuca arundinacea | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | | 15/8/1942 | K |
| Parnassia palustris | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | | 17/8/1939 | SLBI |
| Potamogeton lucens | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | Robert MacKechnie | 11/7/1949 | E |
| Veronica anagallis-aquatica | IE, VCH33 Fermanagh, Lough Erne | Robert MacKechnie | | 8/8/1939 | SLBI |
| Baldellia ranunculoides | IE, VCH33 Fermanagh, Lough Bresk | Robert MacKechnie | | 7/8/1939 | E |
| Carex flacca | IE, VCH33 Fermanagh, Killadeas | Robert MacKechnie | Robert MacKechnie | 9/7/1958 | E |
| Carex riparia | IE, VCH33 Fermanagh, Kesh River | Robert MacKechnie | | 9/7/1958 | E |
| Carex strigosa | IE, VCH33 Fermanagh, Kesh | Robert MacKechnie | Robert MacKechnie | 7/8/1942 | E |
| Festuca arundinacea | IE, VCH33 Fermanagh, Kesh | Robert MacKechnie | | 7/8/1942 | K |
| Potamogeton gramineus | IE, VCH33 Fermanagh, Gubbaroe Point | Robert MacKechnie | Robert MacKechnie | 12/8/1946 | E |
| Baldellia ranunculoides | IE, VCH33 Fermanagh, Fermànagh | Robert MacKechnie | | 12/8/1946 | E |
| Carex strigosa | IE, VCH33 Fermanagh, Crom Castle | Robert MacKechnie | Robert MacKechnie | 7/7/1958 | E |
| Carex acutiformis | IE, VCH33 Fermanagh, Clonelly | Robert MacKechnie | Robert MacKechnie | 11/7/1958 | E |
| Potamogeton coloratus | IE, VCH28 Co. Sligo, Lough Gill | Robert MacKechnie | | 20/7/1949 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | IE, VCH28 Co. Sligo, Lough Gill | Robert MacKechnie | Robert MacKechnie | 20/7/1949 | E |
| Potamogeton lucens x gramineus = P. x angustifolius | IE, VCH28 Co. Sligo, Lough Gill | Robert MacKechnie | Robert MacKechnie | 20/7/1949 | E |
| Carex otrubae | IE, VCH16 West Galway, Roundstone | Robert MacKechnie | | 24/7/1953 | E |
| Hydrilla verticillata | IE, VCH16 West Galway, Renvyle | Basil Walston Ribbons Robert MacKechnie | Robert MacKechnie | 25/7/1953 | E |
| Hydrilla verticillata | IE, VCH16 West Galway, Renvyle | Robert MacKechnie | Robert MacKechnie | 25/7/1953 | E |
| Carex flacca | IE, VCH16 West Galway, Lissoughter | Robert MacKechnie | Robert MacKechnie | 25/7/1953 | E |
| Hydrilla verticillata | IE, VCH16 West Galway, Connemara | William Arthur Sledge | Robert MacKechnie William Arthur Sledge | 10/8/1939 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | IE, VCH9 Co. Clare, Caher River | William Arthur Sledge | Robert MacKechnie | 10/8/1935 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | IE, VCH9 Co. Clare, Caher River | Edward Charles Wallace | Robert MacKechnie | 22/7/1953 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | IE, VCH9 Co. Clare, Black Head | Edward Charles Wallace | Robert MacKechnie | 22/9/1953 | E |
| Potamogeton coloratus x berchtoldii = P. x lanceolatus | IE, VCH9 Co. Clare | Basil Walston Ribbons Robert MacKechnie | Robert MacKechnie | 22/7/1953 | E |
| Carex rostrata | GB, VC112 Shetland, Unst | Robert MacKechnie | | 14/8/1960 | E |
| Potamogeton gramineus | GB, VC112 Shetland, Loch of Brow | Robert MacKechnie | Robert MacKechnie | 24/8/1960 | E |
| Potamogeton coloratus x gramineus = P. x billupsii | GB, VC110 Outer Hebrides, Loch na Liana Mòire | John William Heslop Harrison | John William Heslop Harrison Robert MacKechnie | 23/8/1946 | E |
| Potamogeton natans x gramineus = P. x sparganiifolius | GB, VC110 Outer Hebrides, Loch na Liana Mòire | John William Heslop Harrison | Robert MacKechnie | 23/8/1946 | E |
| Carex diandra | GB, VC109 Caithness, Loch of Winless | Edward Charles Wallace Patrick Martin Hall | Robert MacKechnie | 2/7/1939 | E |
| Carex paniculata | GB, VC109 Caithness, Loch of Winless | Edward Charles Wallace Patrick Martin Hall | Robert MacKechnie | 2/7/1939 | E |
| Carex capillaris | GB, VC109 Caithness, Links of Dunnet | Edward Charles Wallace Patrick Martin Hall | Robert MacKechnie | 2/7/1939 | E |
| Carex vaginata | GB, VC108 West Sutherland, Sheigra | Robert MacKechnie | Robert MacKechnie | 1969 | E |
| Carex chordorrhiza | GB, VC108 West Sutherland, Loch Naver | Edward Charles Wallace Patrick Martin Hall | Robert MacKechnie | 3/7/1939 | E |
| Carex disticha | GB, VC108 West Sutherland, Loch Eriboll | Robert MacKechnie | Robert MacKechnie | 11/7/1971 | E |
| Carex vesicaria | GB, VC108 West Sutherland, Loch a Garbh Bhaid Bhig | | Robert MacKechnie | 4/8/1932 | E |