| 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, VCH8 Co. Limerick, Long Pavement | Bentley | | 1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH8 Co. Limerick, Long Pavement | Bentley | Robert Lloyd Praeger | 1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH38 Co. Down, Saul | Samuel Alexander Stewart | | 8/1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH28 Co. Sligo, Ballysadare River | Robert Lloyd Praeger | Robert Lloyd Praeger | 15/8/1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH29 Co. Leitrim, Tullaghan | Robert Lloyd Praeger | Robert Lloyd Praeger | 15/8/1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH25 Co. Roscommon, Kilteevan | | Science & Art Museum Dublin | 31/8/1897 | 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 |
| Salix viminalis x caprea = S. x smithiana | IE, VCH14 Laois, Abbeyleix | Robert Lloyd Praeger | Robert Lloyd Praeger | 4/7/1898 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH19 Co. Kildare, Rathangan | Robert Lloyd Praeger | Robert Lloyd Praeger | 16/7/1898 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH7 South Tipperary, Cashel | Robert Lloyd Praeger | Edward Francis Linton Robert Lloyd Praeger | 23/7/1898 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH13 Co. Carlow, Saint Mullins | Robert Lloyd Praeger | Robert Lloyd Praeger | 11/8/1898 | DBN |
| Mentha arvensis x spicata = M. x gracilis | IE, Cork, Rostallan | Robert Albert Phillips | Robert Albert Phillips | 9/1898 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH20 Co. Wicklow, Shillelagh | Robert Lloyd Praeger | Robert Lloyd Praeger | 4/6/1899 | 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 |
| Salix viminalis x caprea = S. x smithiana | IE, VCH25 Co. Roscommon, Rockville | Robert Lloyd Praeger | Edward Francis Linton Robert Lloyd Praeger | 11/6/1899 | DBN |
| Salix purpurea x viminalis = S. x rubra | IE, VCH28 Co. Sligo, Loch Gill | Robert Lloyd Praeger | Robert Lloyd Praeger | 12/6/1899 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH29 Co. Leitrim, Glenade | | Robert Lloyd Praeger | 20/7/1899 | DBN |
| Salix purpurea x viminalis = S. x rubra | IE, VCH29 Co. Leitrim, Lough Gill | Robert Lloyd Praeger | Robert Lloyd Praeger | 24/7/1899 | 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 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, VCH11 Co. Kilkenny, Ballinlaw Ferry | | | 11/8/1899 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH11 Co. Kilkenny, Lough Cullin | Robert Lloyd Praeger | Robert Lloyd Praeger | 11/8/1899 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH6 Co. Waterford, Ballyscanlan Lough | Robert Lloyd Praeger | Robert Lloyd Praeger | 12/8/1899 | 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, VCH23 Westmeath, Athlone | 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 aquatica = M. x verticillata | IE, VCH18 Offaly, Tullamore | Robert Lloyd Praeger | Robert Lloyd Praeger | 30/8/1899 | DBN |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Kingston | Charles Frederick Ball | | 7/1900 | 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, VCH25 Co. Roscommon, Slieve Bawn | Robert Lloyd Praeger | Robert Lloyd Praeger | 2/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH10 North Tipperary, Cloughjordan | Robert Lloyd Praeger | Robert Lloyd Praeger | 12/8/1900 | 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 |