| Littorella uniflora | IE, VCH34,VCH36, Lough Derg | Henry George Carroll | Science & Art Museum Dublin | 8/1885 | GALW |
| Lycopodium clavatum | IE, VCH20 Co. Wicklow, Luggala Lodge | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 20/10/1894 | GALW |
| Mentha aquatica x spicata = M. x piperita | IE, VCH8 Co. Limerick, White River | Matilda Cullen Knowles | Science & Art Museum Dublin | 6/1903 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH14 Laois, Port Laoighise | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 3/8/1896 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, Galway, Clifden | M Scannell | Science & Art Museum Dublin | 26/6/1968 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH36 Tyrone, Strabane | Matilda Cullen Knowles | Science & Art Museum Dublin | 7/1896 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH39 Co. Antrim, Carnmoney | Samuel Alexander Stewart | Science & Art Museum Dublin | 14/9/1872 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH39 Co. Antrim, Carnmoney | Samuel Alexander Stewart | Science & Art Museum Dublin | 12/8/1893 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH8 Co. Limerick, Foynes | Charlotte Grace O'Brien | Science & Art Museum Dublin | 8/1906 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH8 Co. Limerick, West Ardagh | Matilda Cullen Knowles | Science & Art Museum Dublin | 9/1908 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH9 Co. Clare, Edenvale | Robert Donough O'Brien | Science & Art Museum Dublin | 26/8/1904 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH13 Co. Carlow | | Science & Art Museum Dublin Denis Robert Pack-Beresford | 1868 | 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, Portarlington | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 3/8/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH25 Co. Roscommon, Kilteevan | | Science & Art Museum Dublin | 31/8/1897 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH25 Co. Roscommon, Slieve Bawn | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 21/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH29 Co. Leitrim, Garadice Lough | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 21/8/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH36 Tyrone, Strabane Canal | | Science & Art Museum Dublin | 9/1900 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH37 Co. Armagh, ballybrennan | W F Johnson | Science & Art Museum Dublin | 9/1894 | DBN |
| Mentha arvensis x spicata = M. x gracilis | IE, VCH30 Co. Cavan, Cavan | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 9/8/1905 | DBN |
| Minuartia hybrida | IE, VCH10 North Tipperary, Portumna | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 24/6/1898 | GALW |
| Minuartia hybrida | IE, VCH13 Co. Carlow, Milford | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 9/8/1898 | GALW |
| Minuartia hybrida | IE, VCH16 West Galway, Oughterard | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 17/7/1899 | GALW |
| Minuartia verna | IE, VCH9 Co. Clare, Ballyvaghan | Harry Corbyn Levinge | Science & Art Museum Dublin Harry Corbyn Levinge | 19/5/1892 | GALW |
| Myosotis discolor | IE, VCH24 Co. Longford, Carn Clonhugh | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 12/6/1898 | GALW |
| Myosotis secunda | IE, VCH19 Co. Kildare, Baltinglass | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 18/9/1899 | GALW |
| Nasturtium sylvestre | IE, VCH8 Co. Limerick, Lough Gur | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 15/8/1900 | GALW |
| Ophioglossum vulgatum | IE, VCH10 North Tipperary, Portumna | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 24/6/1898 | GALW |
| Ophioglossum vulgatum | IE, VCH13 Co. Carlow, Ballintemple | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 4/6/1899 | GALW |
| Osmunda regalis | IE, VCH11 Co. Kilkenny, Brandon Hill | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 1/8/1898 | GALW |
| Osmunda regalis | IE, VCH33 Fermanagh, County Fermà nagh | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 7/1903 | GALW |
| Osmunda regalis | IE, VCH40 Co. Londonderry, Maghera | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 21/7/1894 | GALW |
| Papaver rhoeas | IE, VCH38 Co. Down, County Down | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 12/7/1902 | GALW |
| Papaver rhoeas | IE, VCH40 Co. Londonderry, Magilligan | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 25/7/1894 | GALW |
| Pimpinella saxifraga | IE, VCH26 East Mayo, Lough Carra | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 7/1906 | GALW |
| Polypodium vulgare | IE, VCH1 South Kerry, Sheen River | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 5/1898 | GALW |
| Polypodium vulgare | IE, VCH21 Co. Dublin, Three Rock Mountain | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 9/8/1894 | GALW |
| Puccinellia maritima | IE, VCH9 Co. Clare, Inishmacnaghtan | Matilda Cullen Knowles | Science & Art Museum Dublin Matilda Cullen Knowles | 6/1908 | BIRM |
| Radiola linoides | IE, VCH13 Co. Carlow, Blackstairs Mountain | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 30/7/1899 | GALW |
| Rhynchospora alba var. sordida | IE, VCH36,VCH37, Church Hill | W F Johnson | Science & Art Museum Dublin | 9/1894 | DBC |