| Galium boreale | IE, VCH23,VCH24,VCH25, Lough Ree | J Adams | National Museum Ireland Harold Stuart Thompson | 24/7/1907 | BIRM |
| Isoetes lacustris | IE, VCH20,VCH21, Lough Bray Upper | J Adams | National Museum Ireland Harold Stuart Thompson | 20/7/1904 | BIRM |
| Narcissus tazetta x poeticus = N. x medioluteus | IE, VCH9 Co. Clare, Parteen | Matilda Cullen Knowles | National Museum Ireland Harold Stuart Thompson | 26/4/1907 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH11 Co. Kilkenny, Lough Cullin | Richard Manliffe Barrington | National Museum Ireland | 19/8/1871 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH30 Co. Cavan, Lough Oughter | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 8/1905 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH39 Co. Antrim, Lough Neagh | Richard Manliffe Barrington | National Museum Ireland | 27/8/1874 | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH3,VCH4, South Bride | Isaac Carroll | National Museum Ireland Alexander Goodman More | 9/1855 | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH5 East Cork, South Bride | Thomas Wright | National Museum Ireland Alexander Goodman More | | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, Cork | | National Museum Ireland Alexander Goodman More | 9/1855 | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH23 Westmeath, Kilcleagh Abbey | | National Museum Ireland Alexander Goodman More | 9/1855 | DBN |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH13 Co. Carlow, Borris | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 29/7/1899 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | National Museum Ireland Alexander Goodman More Coslett Herbert Waddell | 2/10/1894 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH27 West Mayo, Westport | Matilda Cullen Knowles | National Museum Ireland Matilda Cullen Knowles | 4/7/1909 | DBN |
| Adiantum capillus-veneris | IE, VCH9 Co. Clare, Kilmurvy | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1895 | GALW |
| Adiantum capillus-veneris | IE, VCH16 West Galway, Ourtnagapple | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1895 | GALW |
| Agrimonia procera | IE, VCH38 Co. Down, Strangford Lough | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1905 | GALW |
| Aquilegia vulgaris | IE, VCH18 Offaly, Tullamore | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 25/5/1895 | GALW |
| Asplenium adiantum-nigrum | IE, VCH11 Co. Kilkenny, Snowhill | | National Museum Ireland Robert Lloyd Praeger | 11/8/1899 | GALW |
| Botrychium lunaria | IE, VCH27 West Mayo, Clare Island | | National Museum Ireland Robert Lloyd Praeger | 7/1903 | GALW |
| Carum carvi | IE, VCH37 Co. Armagh, Armagh, Mullinure | W F Johnson | National Museum Ireland Robert Lloyd Praeger | 5/1894 | GALW |
| Cerastium arvense | IE, VCH16 West Galway, Gentian Hill | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 28/8/1900 | GALW |
| Cerastium diffusum | IE, VCH21 Co. Dublin, Portmarnock | | National Museum Ireland Robert Lloyd Praeger | 12/5/1895 | GALW |
| Cerastium diffusum | IE, VCH27 West Mayo, Clare Island | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1903 | GALW |
| Cerastium diffusum | IE, VCH27 West Mayo, Inishturk | Robert Lloyd Praeger | Irish National Herbarium Glasnevin Dublin National Museum Ireland Robert Lloyd Praeger | 7/1906 | GALW |
| Cerastium fontanum subsp. vulgare | IE, VCH22,VCH31, Drogheda | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 9/6/1895 | GALW |
| Ceratophyllum demersum | IE, VCH8 Co. Limerick, Lough Gur | | National Museum Ireland Robert Lloyd Praeger | 16/8/1900 | GALW |
| Ceratophyllum demersum | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | National Museum Ireland Harry Corbyn Levinge Robert Lloyd Praeger | 9/8/1892 | GALW |
| Ceratophyllum demersum | IE, Mayo, Lough Doo | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 26/7/1903 | GALW |
| Chenopodium murale | IE, VCH21 Co. Dublin, Howth | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 30/8/1894 | GALW |
| Chenopodium rubrum | IE, VCH31 Co. Louth, Baltray | | National Museum Ireland Robert Lloyd Praeger | 11/8/1896 | GALW |
| Chenopodium rubrum | IE, VCH38 Co. Down, Ballyferris Point | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 26/7/1903 | GALW |
| Circaea alpina | IE, VCH28 Co. Sligo, Lough Gill | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1904 | GALW |
| Conium maculatum | IE, VCH27 West Mayo, Clare Island | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1903 | GALW |
| Coronopus didymus | IE, VCH14 Laois, Graigue | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 4/7/1898 | GALW |
| Daboecia cantabrica | IE, Mayo, Carrowdrisky | Matilda Cullen Knowles | National Museum Ireland Matilda Cullen Knowles | 22/6/1909 | GALW |
| Daucus carota | IE, VCH27 West Mayo, Inishkea North | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 19/7/1905 | GALW |
| Epilobium obscurum | IE, VCH27 West Mayo, Inishturk | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 7/1906 | GALW |
| Erophila verna | IE, VCH20 Co. Wicklow, Scalp | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 8/4/1894 | GALW |
| Euphrasia borealis | IE, VCH24,VCH25, Elfeet Bay | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 20/8/1900 | GALW |
| Euphrasia borealis | IE, Mayo, Rosserk | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 27/7/1900 | GALW |