| Salix fragilis x alba = S. x rubens | IE, Ambiguous locality (IE), Limerick | George Fogerty Robert Albert Phillips | Set of British Willows Spencer Henry Bickham | 10/5/1912 20/7/1912 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH39 Co. Antrim, Glenarrif | | Charles Cardale Babington | 11/9/1852 | CGE |
| Mentha aquatica x spicata = M. x piperita | IE, VCH39 Co. Antrim, Carnmoney | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell Spencer Henry Bickham | 8/1895 | CGE |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 2/10/1894 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, Donegal, Rossmore | Edward Francis Linton | John Durbin Gray | 6/8/1885 | CGE |
| Mentha aquatica x spicata = M. x piperita | IE, VCH35 West Donegal, Tangaveane | | | 28/8/1952 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH35 West Donegal, Lough Meela | Christopher David Preston Nicholas F Stewart S D Webster | | 23/8/1989 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH35 West Donegal, Dunglow Lough | Christopher David Preston Nicholas F Stewart S D Webster | | 22/8/1989 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH35 West Donegal, Carrowkeel | Christopher David Preston Nicholas F Stewart | | 25/8/1989 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH33 Fermanagh, Lough Erne | John Ball | | 1837 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH26 East Mayo, Cloonfallagh | Christopher David Preston | | 21/7/1994 | CGE |
| Mentha spicata x longifolia = M. x villosonervata | IE, VCH25 Co. Roscommon, Roscommon | Mary McCallum Webster | | 29/6/1962 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH25 Co. Roscommon, Ballaghaderreen | Christopher David Preston | | 22/8/1988 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH25 Co. Roscommon, Ballaghaderreen | Christopher David Preston | | 22/8/1988 | CGE |
| Salix aurita x repens = S. x ambigua | IE, VCH23 Westmeath, Loughstown | Edward Shearburn Marshall | | 19/7/1895 | CGE |
| Mentha aquatica x spicata = M. x piperita | IE, VCH19 Co. Kildare, Ballitore | Isaac Carroll | | 9/1848 | CGE |
| Salix aurita x repens = S. x ambigua | IE, VCH16 West Galway, Maam | Edward Shearburn Marshall | | 4/7/1895 | CGE |
| Salix cinerea x aurita = S. x multinervis | IE, VCH16 West Galway, Maam | Edward Shearburn Marshall | | 3/7/1895 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH16 West Galway, Cornamona | David Allardice Webb | | 31/8/1959 | CGE |
| Salix aurita x repens = S. x ambigua | IE, VCH15 South-east Galway, Tully | | Charles Cardale Babington | 8/1835 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH12 Co. Wexford, Bunclody | Mary McCallum Webster | | 5/9/1962 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH12 Co. Wexford, Bunclody | Mary McCallum Webster | | 4/9/1962 | CGE |
| Salix fragilis x alba = S. x rubens | IE, VCH8 Co. Limerick, Limerick | George Fogerty | Edward Francis Linton Spencer Henry Bickham | 10/5/1912 20/7/1912 | CGE |
| Salix fragilis x alba = S. x rubens | IE, VCH8 Co. Limerick, Limerick | George Fogerty Robert Albert Phillips | Set of British Willows | 10/5/1912 20/7/1912 | CGE |
| Salix fragilis x alba = S. x rubens | IE, VCH8 Co. Limerick, Limerick | George Fogerty Robert Albert Phillips | Set of British Willows | 10/5/1912 20/7/1912 | CGE |
| Salix fragilis x alba = S. x rubens | IE, VCH8 Co. Limerick, Limerick | Edward Francis Linton | | 15/5/1912 20/7/1912 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, Cork, Cork | Isaac Carroll | Charles Cardale Babington | 9/1856 | CGE |
| Mentha aquatica x spicata = M. x piperita | IE, Cork | Isaac Carroll | | 9/1851 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, Cork | J Carroll | | 9/1855 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, Cork | Isaac Carroll | Charles Cardale Babington | 9/1855 | CGE |
| Salix aurita x repens = S. x ambigua | IE, Cork | J Carroll | | 1853 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH4 Mid Cork, River Bride IE, VCH4,VCH5, County Cork | Isaac Carroll | Charles Cardale Babington | 9/1855 | CGE |
| Salix viminalis x caprea = S. x smithiana | IE, VCH4 Mid Cork, Leemount | | | 9/1853 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH3 West Cork, Gearagh | Peter Derek Sell | | 13/8/1952 | CGE |
| Salix aurita x repens = S. x ambigua | IE, VCH3 West Cork, Bear Haven | Isaac Carroll | Charles Cardale Babington | 1853 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | IE, Kerry, Killarney | | Charles Cardale Babington | 9/6/1836 | CGE |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH12,VCH13, Bunclody | Mary McCallum Webster | | 4/9/1962 | CGE |
| Salix caprea x cinerea = S. x reichardtii | GB, VC113 Channel Islands, Sark | David Charles McClintock | Richard Crewdson Leaver Howitt | 7/1978 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC113 Channel Islands, Saint Saviour's, Guernsey | B H S Russell | | 29/11/1961 | CGE |
| Salix aurita x repens = S. x ambigua | GB, VC112 Shetland, Brindister | Walter Scott | Richard Crewdson Leaver Howitt | 7/1975 | CGE |