| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Sandyford Industrial Estate | J.R Sylvia Reynolds | | 20/9/1988 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Sandyford Industrial Estate | J R Sylvia Reynolds | | 20/9/1988 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH21 Co. Dublin, Rathfarnham | | | 7/1893 | 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 |
| Salix cinerea x phylicifolia = S. x laurina | IE, VCH21 Co. Dublin, Phoenix Park | Paddy Reilly | | 7/1990 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Leopardstown Racecourse | Sylvia Reynolds | | 9/9/1988 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Leopardstown Racecourse | Sylvia Reynolds | | 9/9/1988 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Leopardstown | Sylvia Reynolds | | 9/9/1988 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Killiney | Sylvia Reynolds | | 30/10/1986 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH21 Co. Dublin, Kelly's Glen | Sylvia Reynolds | | 10/8/1987 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH21 Co. Dublin, Kelly's Glen | Sylvia Reynolds | | 10/8/1987 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH21 Co. Dublin, Hazelhatch | Sylvia Reynolds | | 9/9/1989 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH21 Co. Dublin, Dundrum | Robert Lloyd Praeger | Robert Lloyd Praeger | 25/5/1894 | DBN |
| Salix viminalis x caprea x aurita = S. x stipularis | IE, VCH21 Co. Dublin, Dublin | Sylvia Reynolds | | 9/9/1988 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH21 Co. Dublin, Cockles Bridge | Nathaniel Colgan | Nathaniel Colgan | 20/8/1892 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH21 Co. Dublin, Baldoyle | | | 1871 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH21 Co. Dublin, Balbriggan | M O'Leary | | 19/8/1934 | DBN |
| Salix caprea x cinerea = S. x reichardtii | IE, VCH21 Co. Dublin, Alexandra Basin | Sylvia Reynolds | | 6/10/1988 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH20 Co. Wicklow, Shillelagh | Robert Lloyd Praeger | Robert Lloyd Praeger | 4/6/1899 | DBN |
| Salix myrsinifolia x phylicifolia = S. x tetrapla | IE, VCH20 Co. Wicklow, Lough Derevaragh | Donal Michael Synnott | Irish National Herbarium Glasnevin Dublin | 25/7/1987 | 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 cinerea = S. x holosericea | IE, VCH20 Co. Wicklow, Enniskerry | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 27/5/1894 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH19 Co. Kildare, Smithstown House | Declan Doogue | | 5/10/1987 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH19 Co. Kildare, Rathangan | Robert Lloyd Praeger | Robert Lloyd Praeger | 16/7/1898 | DBN |
| Salix purpurea x viminalis x cinerea = S. x forbyana | IE, VCH19 Co. Kildare, Osberstown | Donal Michael Synnott | | 4/10/1978 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH19 Co. Kildare, Monasterevin | Robert Lloyd Praeger | Robert Lloyd Praeger | 23/7/1893 | DBN |
| Salix purpurea x viminalis x cinerea = S. x forbyana | IE, VCH19 Co. Kildare, Monasterevin | Declan Doogue | | 21/8/1986 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH19 Co. Kildare, Leixlip | Robert Lloyd Praeger | Robert Lloyd Praeger | 9/8/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH19 Co. Kildare | J Douglas | | 1864 to 1865 | 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, VCH18 Offaly, Portarlington | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 3/8/1896 | 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, Edenderry | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 17/7/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH18 Offaly, Clara | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH18 Offaly, Clara | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH18 Offaly, Banagher | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 25/6/1898 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, Galway, Clifden | M Scannell | Science & Art Museum Dublin | 26/6/1968 | DBN |
| Salix pentandra x fragilis = S. x meyeriana | IE, VCH16 West Galway, Moyard | M Scannell | Irish National Herbarium Glasnevin Dublin | 14/9/1979 | DBN |
| Salix triandra x viminalis = S. x mollissima | IE, VCH16 West Galway, Moyard | M Scannell | | 14/9/1979 | DBN |