| Ceratophyllum demersum | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | | 13/9/1895 | BIRM |
| Potamogeton friesii | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | | 24/7/1895 | BIRM |
| Potamogeton lucens | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | | 9/8/1892 | MANCH |
| Potamogeton lucens | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley | 9/8/1892 | BIRM |
| Scrophularia auriculata | IE, VCH23 Westmeath, Lough Derravaragh | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley | 13/9/1895 | BIRM |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Frederick Janson Hanbury Harry Corbyn Levinge | 16/7/1891 | BM |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Eliza Standerwick Gregory | 16/7/1891 | BM |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Alexander Somerville | 16/7/1891 | E |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Edward Francis Linton | 16/7/1891 | BM |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Charles Edgar Salmon Harry Corbyn Levinge | 16/7/1891 | BM |
| Carex appropinquata | IE, VCH23 Westmeath, Ladestown | Harry Corbyn Levinge | Science & Art Museum Dublin Harold Stuart Thompson | 16/7/1891 | BIRM |
| Brassica napus | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge | 22/7/1894 | SHYB |
| Brassica napus | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge | 9/9/1895 | ABS |
| Chara rudis | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge | 11/7/1895 | SHYB |
| Juncus bulbosus | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 8/7/1893 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | | 23/8/1888 | DBN |
| Ranunculus baudotii x trichophyllus = R. x segretii | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 2/6/1895 | ABS |
| Ranunculus trichophyllus | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge | 2/6/1895 | SHYB |
| Rubus macrophyllus var. schlechtendalii | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 28/8/1895 | ABS |
| Rumex crispus | IE, VCH23 Westmeath, Knockdrin | William Richardson Linton | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 27/7/1895 | BIRM |
| Rumex crispus x obtusifolius = R. x pratensis | IE, VCH23 Westmeath, Knockdrin | William Richardson Linton | Botanical Exchange Club of The British Isles Charles Bailey Harry Corbyn Levinge | 27/7/1895 | MANCH |
| Rumex crispus x obtusifolius = R. x pratensis | IE, VCH23 Westmeath, Knockdrin | William Richardson Linton | Botanical Exchange Club of The British Isles Charles Bailey Harry Corbyn Levinge | 27/7/1895 | MANCH |
| Rumex crispus x obtusifolius = R. x pratensis | IE, VCH23 Westmeath, Knockdrin | William Richardson Linton | Botanical Exchange Club of The British Isles Charles Bailey Harry Corbyn Levinge | 27/7/1895 | MANCH |
| Vaccinium oxycoccos | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge William Hadden Beeby | 5/7/1891 | SLBI |
| Veronica montana | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | Harry Corbyn Levinge | 4/1890 | K |
| Polypodium vulgare | IE, VCH23 Westmeath, Knock Ross | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 17/6/1892 | BIRM |
| 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 |
| Brassica napus | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | William Hunt Painter | 22/7/1894 | ABS |
| Carex hostiana | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 3/7/1895 | BIRM |
| Festuca arundinacea | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | | 4/8/1884 | K |
| Ranunculus trichophyllus | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | | 10/7/1893 | SHYB |
| Ranunculus trichophyllus | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 15/6/1894 | ABS |
| Ranunculus trichophyllus | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 2/4/1895 | SHYB |
| Rubus amplificatus | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | Harry Corbyn Levinge | 28/8/1895 | SLBI |
| Rubus leptothyrsos | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | Harry Corbyn Levinge | 31/7/1895 | ABS |
| Rubus pyramidalis | IE, VCH23 Westmeath, Knock Drui | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 31/7/1895 | SHYB |
| Galium palustre subsp. elongatum | IE, VCH23 Westmeath, Knock Drin | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 8/8/1892 | ABS |
| Festuca altissima | IE, VCH23 Westmeath, Knock | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 17/6/1892 | ABS |
| Festuca arundinacea x Lolium perenne = x Festulolium holmbergii | IE, VCH23 Westmeath, Knock | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 4/7/1892 | ABS |
| Festuca pratensis x Lolium perenne = x Festulolium loliaceum | IE, VCH23 Westmeath, Knock | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 18/7/1894 | ABS |