| 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 arvensis x aquatica = M. x verticillata | IE, VCH18 Offaly, Portarlington | Robert Lloyd Praeger | Science & Art Museum Dublin Robert Lloyd Praeger | 3/8/1896 | DBN |
| Littorella uniflora | IE, VCH34,VCH36, Lough Derg | Henry George Carroll | Science & Art Museum Dublin | 8/1885 | GALW |
| Apium nodiflorum | IE, VCH11 Co. Kilkenny, Gauls Mill | Thomas Chandlee | Science & Art Museum Dublin Thomas Chandlee | 1863 | GALW |
| Salix cinerea x phylicifolia = S. x laurina | IE, VCH35 West Donegal, Ardara | | Science & Art Museum Dublin Henry Chichester Hart | | DBN |
| Calluna vulgaris | IE, VCH36 Tyrone, Bessy Bell | Matilda Cullen Knowles | Science & Art Museum Dublin | 7/1896 | DBC |
| Chenopodium suecicum | IE, VCH19 Co. Kildare, Straffan | Matilda Cullen Knowles | Science & Art Museum Dublin | 10/1904 | GALW |
| Eruca vesicaria subsp. sativa | IE, VCH19 Co. Kildare, Straffan | Matilda Cullen Knowles | Irish National Herbarium Glasnevin Dublin Science & Art Museum Dublin | 8/1904 | GALW |
| Lepidium ruderale | IE, VCH19 Co. Kildare, Straffan | Matilda Cullen Knowles | Irish National Herbarium Glasnevin Dublin Science & Art Museum Dublin | 8/1904 | 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, VCH36 Tyrone, Strabane | Matilda Cullen Knowles | Science & Art Museum Dublin | 7/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH8 Co. Limerick, West Ardagh | Matilda Cullen Knowles | Science & Art Museum Dublin | 9/1908 | DBN |
| Puccinellia maritima | IE, VCH9 Co. Clare, Inishmacnaghtan | Matilda Cullen Knowles | Science & Art Museum Dublin Matilda Cullen Knowles | 6/1908 | BIRM |
| 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, 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 |
| Spergularia marina | IE, VCH8,VCH9, Foynes | Matilda Cullen Knowles | Irish National Herbarium Glasnevin Dublin Science & Art Museum Dublin | 6/1904 | GALW |
| Minuartia verna | IE, VCH9 Co. Clare, Ballyvaghan | Harry Corbyn Levinge | Science & Art Museum Dublin Harry Corbyn Levinge | 19/5/1892 | GALW |
| Rosa villosa | IE, VCH23 Westmeath, Knock Ross | Harry Corbyn Levinge | Irish National Herbarium Glasnevin Dublin Science & Art Museum Dublin Harry Corbyn Levinge | 9/9/1892 | GALW |
| Stellaria palustris | IE, VCH23 Westmeath, Lough Ennell | Harry Corbyn Levinge | Science & Art Museum Dublin Harry Corbyn Levinge | 6/8/1891 | GALW |
| Rhynchospora alba | IE, VCH25 Co. Roscommon, Kilteevan | | Science & Art Museum Dublin T A P Mapother | 21/7/1897 | DBC |
| Cerastium diffusum | IE, VCH16,VCH26,VCH27, Lough Mask | Edward Shearburn Marshall | Science & Art Museum Dublin | 12/6/1896 | GALW |
| 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, VCH8 Co. Limerick, Foynes | Charlotte Grace O'Brien | Science & Art Museum Dublin | 8/1906 | 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 |
| Sium latifolium | IE, VCH9 Co. Clare, Ennis | Patrick Bernard O'Kelly | Science & Art Museum Dublin | 12/8/1891 | GALW |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH13 Co. Carlow | | Science & Art Museum Dublin Denis Robert Pack-Beresford | 1868 | 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, 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 |
| 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 |
| Trichomanes speciosum | | | Science & Art Museum Dublin Anne Elizabeth Ball Harold Stuart Thompson | | BIRM |
| Rumex crispus | GB, VC13 West Sussex, Southwater | | Science & Art Museum Dublin John Byrne Leicester Warren John Byrne Leicester Warren | 27/7/1877 | GALW |