 | Cochlearia officinalis | IE, VCH20 Co. Wicklow, Wicklow | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 19/5/1979 | GALW |
 | Cochlearia officinalis | IE, VCH21 Co. Dublin, Donabate | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 3/6/1979 | GALW |
 | Cochlearia officinalis | IE, VCH21 Co. Dublin, Sutton | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 26/8/1979 | GALW |
 | Cochlearia officinalis | IE, VCH35 West Donegal, Dungloe | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 13/7/1980 | GALW |
 | Cochlearia officinalis | IE, VCH39 Co. Antrim, Giants Causeway | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 9/7/1980 | GALW |
 | Cochlearia officinalis | IE, VCH39 Co. Antrim, Torr Head | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 9/7/1980 | GALW |
 | Cochlearia officinalis subsp. scotica | IE, VCH9 Co. Clare, Ballyvaghan | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 22/6/1979 | GALW |
 | Cochlearia officinalis subsp. scotica | IE, VCH9 Co. Clare, Eararna | Micheline Joan Sheehy Skeffington | | 12/5/1981 | GALW |
 | Cochlearia officinalis subsp. scotica | IE, VCH35 West Donegal, Kincaslough | Micheline Joan Sheehy Skeffington | | 16/6/1979 | GALW |
 | Cochlearia officinalis subsp. scotica | IE, VCH39 Co. Antrim, Cushendun | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 8/7/1980 | GALW |
 | Cochlearia pyrenaica | GB, Perthshire, Caenlochan | Micheline Joan Sheehy Skeffington | | 23/7/1986 | GALW |
 | Cochlearia pyrenaica subsp. alpina | IE, VCH7,VCH8, Lough Curra | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 16/8/1929 | GALW |
 | Cochlearia pyrenaica subsp. alpina | IE, VCH1 South Kerry, Lough Googh | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 17/6/1980 | GALW |
 | Cochlearia pyrenaica subsp. alpina | IE, VCH28 Co. Sligo, Benbulbin | Micheline Joan Sheehy Skeffington | | 10/6/1981 | GALW |
 | Cochlearia scotica | IE, VCH35 West Donegal, Dungloe | Peter Sherlock Wyse Jackson | Trinity College, Dublin | 13/7/1980 | GALW |
 | Conium maculatum | IE, VCH27 West Mayo, Clare Island | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1903 | GALW |
 | Conium maculatum | IE, VCH38 Co. Down, Holywood | | | 15/7/1885 | GALW |
 | Coronopus didymus | IE, VCH11 Co. Kilkenny, Grannagh | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 31/7/1898 | GALW |
 | Coronopus didymus | IE, VCH14 Laois, Graigue | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 4/7/1898 | GALW |
 | Coronopus didymus | IE, VCH16 West Galway, Galway | Micheline Joan Sheehy Skeffington | | 18/4/1983 | GALW |
 | Coronopus didymus | IE, VCH16 West Galway, Salt Hill | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 28/8/1899 | GALW |
 | Coronopus didymus | IE, VCH16 West Galway, Spiddal | Declan Doogue | Irish Biogeographical Society | 8/1969 | GALW |
 | Coronopus didymus | IE, VCH20 Co. Wicklow, Wicklow | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 20/8/1897 | GALW |
 | Coronopus didymus | IE, VCH20 Co. Wicklow, Wicklow | Micheline Joan Sheehy Skeffington | Irish Biogeographical Society | 19/5/1979 | GALW |
 | Coronopus didymus | IE, VCH21 Co. Dublin, Merrion | | | 8/9/1931 | GALW |
 | Coronopus didymus | IE, VCH21 Co. Dublin, Milltown | Robert Lloyd Praeger | | 13/6/1894 | GALW |
 | Coronopus didymus | IE, VCH27 West Mayo, Westport Quay | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 7/7/1903 | GALW |
 | Coronopus squamatus | IE, VCH11,VCH13, Goresbridge | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 29/7/1897 | GALW |
 | Coronopus squamatus | IE, VCH19,VCH21,VCH22, Lucan | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 11/6/1894 | GALW |
 | Coronopus squamatus | IE, VCH11 Co. Kilkenny, Thomastown | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 30/7/1898 | GALW |
 | Coronopus squamatus | IE, VCH15 South-east Galway, Craughwell | Micheline Joan Sheehy Skeffington | | 20/6/1984 | GALW |
 | Coronopus squamatus | IE, VCH27 West Mayo, Clare Island | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 7/1903 | GALW |
 | Coronopus squamatus | IE, VCH39 Co. Antrim, Cushendun | | | 20/7/1886 | GALW |
 | Crithmum maritimum | IE, Kerry, Derrymore | Peter Sherlock Wyse Jackson | | 2/9/1980 | GALW |
 | Crithmum maritimum | IE, VCH12 Co. Wexford, Carnsore Point | Botanical Society of The British Isles | | 30/8/1977 | GALW |
 | Crithmum maritimum | IE, VCH27 West Mayo, Dooega | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 27/7/1904 | GALW |
 | Cruciata laevipes | FR, Baisieux | Micheline Joan Sheehy Skeffington | | 21/8/1981 | GALW |
 | Cryptogramma crispa | GB, VC49 Caernarvonshire, Snowdon | Noel Kirby | | 20/8/1978 | GALW |
 | Cryptogramma crispa | GB, VC90 Angus, Caenlochan | Micheline Joan Sheehy Skeffington | | 23/7/1986 | GALW |
 | Cryptogramma crispa | GB, VC100 Clyde Islands, Glen Cloy | | Queens University Belfast | 29/6/1956 | GALW |