| 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 |
| Salix viminalis x caprea = S. x smithiana | IE, VCH14 Laois, Abbeyleix | Robert Lloyd Praeger | Robert Lloyd Praeger | 4/7/1898 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH14 Laois, Graigue | Robert Lloyd Praeger | Robert Lloyd Praeger | 31/7/1899 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH15 South-east Galway, Ballinasloe | Robert Lloyd Praeger | Robert Lloyd Praeger | 29/8/1899 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH18 Offaly, Clara | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH18 Offaly, Clara | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH18 Offaly, Portarlington | Robert Lloyd Praeger | Robert Lloyd Praeger | 3/8/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH18 Offaly, Tullamore | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH19 Co. Kildare, Monasterevin | Robert Lloyd Praeger | Robert Lloyd Praeger | 23/7/1893 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH19 Co. Kildare, Rathangan | Robert Lloyd Praeger | Robert Lloyd Praeger | 16/7/1898 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH20 Co. Wicklow, Kilmacanogue | Robert Lloyd Praeger | Robert Lloyd Praeger | 12/8/1894 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH20 Co. Wicklow, Shillelagh | Robert Lloyd Praeger | Robert Lloyd Praeger | 4/6/1899 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH21 Co. Dublin, Dundrum | Robert Lloyd Praeger | Robert Lloyd Praeger | 25/5/1894 | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH21 Co. Dublin, Rathfarnham | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/1903 | DBN |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH21 Co. Dublin, Rathfarnham | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/1903 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH24 Co. Longford, Ballymahon | Robert Lloyd Praeger | Robert Lloyd Praeger | 18/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH24 Co. Longford, Ballymahon | Robert Lloyd Praeger | Robert Lloyd Praeger | 19/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH24 Co. Longford, River Tang, mouth of | Robert Lloyd Praeger | Robert Lloyd Praeger | 19/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH24 Co. Longford, River Tang, mouth of | Robert Lloyd Praeger | Robert Lloyd Praeger | 19/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH25 Co. Roscommon, Lough Ree | Robert Lloyd Praeger | Robert Lloyd Praeger | 21/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH25 Co. Roscommon, Slieve Bawn | Robert Lloyd Praeger | Robert Lloyd Praeger | 2/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH27 West Mayo, Lough Conn | Robert Lloyd Praeger | Robert Lloyd Praeger | 27/7/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH27 West Mayo, Lough Conn | Robert Lloyd Praeger | | 27/7/1900 | DBN |
| Salix purpurea x viminalis x cinerea = S. x forbyana | IE, Mayo, Foxford | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/7/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH28 Co. Sligo, Ballysadare River | Robert Lloyd Praeger | Robert Lloyd Praeger | 15/8/1897 | DBN |
| Salix purpurea x viminalis = S. x rubra | IE, VCH29 Co. Leitrim, Annaghearly Lough | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/6/1899 | DBN |
| Salix purpurea x viminalis x cinerea = S. x forbyana | IE, VCH29 Co. Leitrim, Annaghearly Lough | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/6/1899 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH30 Co. Cavan, Annagh Lough | Robert Lloyd Praeger | Robert Lloyd Praeger | 8/1905 | DBN |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH30 Co. Cavan, Cavan | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/8/1905 | 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 spicata = M. x gracilis | IE, VCH30 Co. Cavan, Lough Ramor | Robert Lloyd Praeger | Robert Lloyd Praeger | 20/7/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH37 Co. Armagh, ballybrennan | W F Johnson | Robert Lloyd Praeger | 9/1894 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH37 Co. Armagh, Portadown | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/1892 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH38 Co. Down, Downpatrick | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/1886 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH39 Co. Antrim, Donegore | Robert Lloyd Praeger | Robert Lloyd Praeger | 8/1886 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH39 Co. Antrim, Portmore Lough | Robert Lloyd Praeger | | 27/8/1886 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Sandyford Industrial Estate | J R Sylvia Reynolds | | 20/9/1988 | DBN |
| Salix cinerea x phylicifolia = S. x laurina | IE, VCH28 Co. Sligo, Ballinphull | D H Riley | | 30/5/1998 | DBN |
| Salix cinerea x phylicifolia = S. x laurina | IE, VCH28 Co. Sligo, Ballinphull | D H Riley | | 30/5/1998 | DBN |
| Salix triandra x viminalis = S. x mollissima | IE, VCH3 West Cork, Innishannon | M Scannell Tony O'Mahony | | 1/6/1975 | DBN |