| 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, 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, VCH30 Co. Cavan, Mount Lugent | Robert Lloyd Praeger | Robert Lloyd Praeger | 19/7/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH30 Co. Cavan, Annagh Lough | Robert Lloyd Praeger | | 9/8/1905 | 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, VCH30 Co. Cavan, Lough Sheelin | Robert Lloyd Praeger | Robert Lloyd Praeger | 18/7/1896 | DBN |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH13 Co. Carlow, Saint Mullins | Robert Lloyd Praeger | Robert Lloyd Praeger | 11/8/1898 | DBN |
| Potamogeton gramineus | IE, VCH23 Westmeath, Lough Iron | Robert Lloyd Praeger | Allan Octavian Hume Arthur Bennett | 3/7/1899 | SLBI |
| Thalictrum minus | IE, VCH15 South-east Galway, Dalystown | Robert Lloyd Praeger | National Museum Ireland Robert Lloyd Praeger | 21/6/1898 | GALW |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH8 Co. Limerick, Long Pavement | Bentley | Robert Lloyd Praeger | 1897 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH36 Tyrone, Coalisland Canal | R W Bingham | Robert Lloyd Praeger | 8/1905 | DBN |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Old Storridge Common | James Henry Augustus Steuart | John Durbin Gray Robert Lloyd Praeger | 8/1892 | CGE |
| Scrophularia umbrosa | IE, VCH19 Co. Kildare, Celbridge | Robert Lloyd Praeger | Robert Lloyd Praeger | 21/1/1914 | K |
| Erica carnea | IE, VCH16 West Galway, Roundstone | Robert Lloyd Praeger | Allan Octavian Hume | 5/4/1895 | SLBI |
| Erica carnea | IE, VCH16 West Galway, Roundstone | Robert Lloyd Praeger | Allan Octavian Hume | 5/4/1895 | SLBI |
| Erica carnea | IE, VCH16 West Galway, Roundstone | Robert Lloyd Praeger | Allan Octavian Hume | 5/4/1895 | SLBI |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Robert Lloyd Praeger | Allan Octavian Hume | 8/1896 | SLBI |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Robert Lloyd Praeger | Allan Octavian Hume | 8/1896 | SLBI |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Robert Lloyd Praeger | Allan Octavian Hume Robert Lloyd Praeger | 8/1896 | SLBI |
| Spiranthes romanzoffiana | IE, VCH40 Co. Londonderry, Kilrea | Robert Lloyd Praeger | Allan Octavian Hume | 1/7/1895 | SLBI |
| Utricularia intermedia | IE, VCH16 West Galway, Roundstone | Robert Lloyd Praeger | Allan Octavian Hume | 5/1895 | SLBI |
| Carex aquatilis | IE, VCH39 Co. Antrim, Ballymena | Matilda Cullen Knowles | Robert Lloyd Praeger | 6/1895 | DBC |
| Stachys palustris | IE, VCH39 Co. Antrim, Cullybackey | Matilda Cullen Knowles | Robert Lloyd Praeger | 7/1893 | DBC |
| Dryopteris dilatata | IE, VCH40 Co. Londonderry, Limavady | Mary Isabella Leebody | Robert Lloyd Praeger | 9/1894 | GALW |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH40 Co. Londonderry, Limavady | Mary Isabella Leebody | Robert Lloyd Praeger | 9/1894 | DBN |
| Veronica peregrina | IE, VCH40 Co. Londonderry, Londonderry | Mary Isabella Leebody | Robert Lloyd Praeger | 7/1896 | DBC |
| Elatine hydropiper | IE, VCH38 Co. Down, Loughbrickland | Henry William Lett | Robert Lloyd Praeger | 6/1893 | DBC |
| Ceratophyllum demersum | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | National Museum Ireland Harry Corbyn Levinge Robert Lloyd Praeger | 9/8/1892 | GALW |
| Stellaria palustris | IE, VCH23 Westmeath, Lough Ennell | Harry Corbyn Levinge | National Museum Ireland Harry Corbyn Levinge Robert Lloyd Praeger | 30/7/1892 | GALW |
| Sisymbrium irio | IE, VCH21 Co. Dublin, Dublin | Robert Lloyd Praeger | Botanical Exchange Club of The British Isles Albert Bruce Jackson Augustin Ley | 8/1903 | BIRM |
| Salix purpurea x viminalis = S. x rubra | IE, VCH29 Co. Leitrim, Lough Gill | Robert Lloyd Praeger | Robert Lloyd Praeger | 24/7/1899 | 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 viminalis x caprea = S. x smithiana | IE, VCH23 Westmeath, Athlone | Robert Lloyd Praeger | Robert Lloyd Praeger | 29/8/1899 | DBN |
| Salix viminalis x cinerea = S. x holosericea | IE, VCH29 Co. Leitrim, Glenade | | Robert Lloyd Praeger | 20/7/1899 | 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 |
+ | Calamagrostis stricta | IE, VCH39 Co. Antrim, Lough Neagh | Robert Lloyd Praeger | Elizabeth Anne Lomax Robert Lloyd Praeger | 8/8/1892 | MANCH |
| Saxifraga hypnoides | GB, VC5 South Somerset, West Monkton Cultivated IE, VCH9 Co. Clare, Black Head | Edward Shearburn Marshall Robert Lloyd Praeger | London Natural History Society | 16/5/1916 29/5/1916 | SLBI |
| Saxifraga hypnoides | GB, VC5 South Somerset, West Monkton Cultivated IE, VCH9 Co. Clare, Black Head | Edward Shearburn Marshall Robert Lloyd Praeger | Watson Botanical Exchange Club William Robert Sherrin | 16/5/1916 29/5/1916 | SLBI |
| Trifolium arvense | IE, VCH21 Co. Dublin, Rush | David McArdle | National Museum Ireland Robert Lloyd Praeger | 9/1894 | GALW |
| Inula salicina | IE, VCH9 Co. Clare, Ballyvaughan Cultivated | Patrick Bernard O'Kelly Robert Lloyd Praeger | Robert Lloyd Praeger | 7/1895 | DBC |