| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Science & Art Museum Dublin Harold Stuart Thompson | 16/7/1891 | BIRM |
| Geranium sanguineum | IE, VCH21 Co. Dublin, Howth | Harry Corbyn Levinge | Science & Art Museum Dublin Harold Stuart Thompson | 24/8/1890 | BIRM |
| Puccinellia maritima | IE, VCH9 Co. Clare, Inishmacnaghtan | Matilda Cullen Knowles | Science & Art Museum Dublin Matilda Cullen Knowles | 6/1908 | BIRM |
| Trichomanes speciosum | | | Science & Art Museum Dublin Anne Elizabeth Ball Harold Stuart Thompson | | BIRM |
| Calluna vulgaris | IE, VCH36 Tyrone, Bessy Bell | Matilda Cullen Knowles | Science & Art Museum Dublin | 7/1896 | DBC |
| Phegopteris connectilis | | A H Foord | Science & Art Museum Dublin A H Foord | | DBC |
| Rhynchospora alba var. sordida | IE, VCH36,VCH37, Church Hill | W F Johnson | Science & Art Museum Dublin | 9/1894 | DBC |
| Rhynchospora alba | IE, VCH25 Co. Roscommon, Kilteevan | | Science & Art Museum Dublin T A P Mapother | 21/7/1897 | DBC |
| 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 |
| Salix cinerea x phylicifolia = S. x laurina | IE, VCH35 West Donegal, Ardara | | Science & Art Museum Dublin Henry Chichester Hart | | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH8 Co. Limerick, West Loghill | Matilda Cullen Knowles | Science & Art Museum Dublin | 6/1904 | 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, VCH36 Tyrone | Matilda Cullen Knowles | Science & Art Museum Dublin | 9/1900 | DBN |
| Salix viminalis x caprea = S. x smithiana | IE, VCH36 Tyrone, Foyle | Matilda Cullen Knowles | Science & Art Museum Dublin | 9/1900 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH8 Co. Limerick, Loghill | Matilda Cullen Knowles | Science & Art Museum Dublin | 6/1904 | 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 |
| Apium nodiflorum | IE, VCH11 Co. Kilkenny, Gauls Mill | Thomas Chandlee | Science & Art Museum Dublin Thomas Chandlee | 1863 | GALW |
| Arenaria serpyllifolia | IE, VCH20,VCH21, Kilmacanoge | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 8/1894 | GALW |
| Botrychium lunaria | IE, VCH20 Co. Wicklow, Lough Dan | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 1/7/1894 | GALW |
| Carum verticillatum | IE, VCH1 South Kerry, Kenmare | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 12/7/1898 | GALW |
| Cerastium diffusum | IE, VCH16,VCH26,VCH27, Lough Mask | Edward Shearburn Marshall | Science & Art Museum Dublin | 12/6/1896 | GALW |
| Cerastium diffusum | IE, VCH20 Co. Wicklow, Greystones | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 5/6/1894 | GALW |
| Cerastium semidecandrum | IE, VCH21 Co. Dublin, Portmarnock | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 12/5/1895 | GALW |