| Neotinea maculata | IE, VCH9 Co. Clare, Burren | Patrick Bernard O'Kelly | Augustin Ley Harry Corbyn Levinge | 5/1894 | BIRM |
| Neotinea maculata | IE, VCH9 Co. Clare, Glanquin | Harry Corbyn Levinge | Harry Corbyn Levinge | 20/5/1892 | ABS |
| Neotinea maculata | IE, VCH9 Co. Clare, Glenquin | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Harry Corbyn Levinge | 20/5/1893 | ABS |
| Neotinea maculata | IE, VCH9 Co. Clare, Glenquin House | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 20/5/1892 | BIRM |
| Neckeria lutea | IE, VCH20 Co. Wicklow, Ballyarthur | R Bayly | Harry Corbyn Levinge William Hunt Painter | 8/8/1894 | ABS |
+ | Myriophyllum verticillatum | IE, VCH20 Co. Wicklow, nr Mullingar | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Charles Bailey Harry Corbyn Levinge | 22/7/1895 | MANCH |
| Moehringia trinervia | IE, VCH23 Westmeath | Harry Corbyn Levinge | Dublin Museum Irish National Herbarium Glasnevin Dublin | 24/7/1890 | GALW |
| Minuartia verna | IE, VCH9 Co. Clare, Ballyvaghan | Harry Corbyn Levinge | Science & Art Museum Dublin Harry Corbyn Levinge | 19/5/1892 | GALW |
| Mentha spicata x suaveolens = M. x villosa | GB, VC57 Derbyshire, Matlock | A Steuart Eleonora Armitage Harry Corbyn Levinge | Harry Corbyn Levinge John Durbin Gray | 30/8/1893 | CGE |
| Mentha spicata | IE, VCH23 Westmeath, River Gaine | Harry Corbyn Levinge | James Sykes Gamble | 27/9/1888 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC57 Derbyshire, Miller's Dale | Harry Corbyn Levinge | | 7/9/1893 | LIV |
| Mentha arvensis x aquatica = M. x verticillata | IE, VCH23 Westmeath, Knockdrin | Harry Corbyn Levinge | | 23/8/1888 | DBN |
| Marrubium vulgare | IE, VCH9 Co. Clare, Black Head | Harry Corbyn Levinge | | 21/6/1891 | K |
| Marrubium vulgare | IE, VCH9 Co. Clare, Black Head | Harry Corbyn Levinge | Harry Corbyn Levinge | 21/6/1891 | K |
| Limosella aquatica | IE, VCH9 Co. Clare, Corofin | Patrick Bernard O'Kelly | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 13/7/1892 | BIRM |
| Limosella aquatica | IE, VCH9 Co. Clare, Inchiquin Lough | Patrick Bernard O'Kelly | Harold Stuart Thompson Harry Corbyn Levinge | 13/7/1893 | BIRM |
| Juncus tenuis | IE, Cork, Lauragh | Reginald Wiliam Scully | Harry Corbyn Levinge | 7/8/1894 | SHYB |
| Juncus bulbosus | IE, VCH23 Westmeath | | Harry Corbyn Levinge | 1891 | SLBI |
| 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 |
| Juncus bulbosus | IE, VCH23 Westmeath, Quarry Bog | Harry Corbyn Levinge | Augustin Ley Harry Corbyn Levinge | 15/8/1891 | BIRM |
| Inula salicina | IE, VCH15 South-east Galway, Looscaun Cultivated | Edward Francis Linton | Harry Corbyn Levinge William Hunt Painter | 1885 | ABS |
| Inula salicina | IE, VCH15 South-east Galway, Lough Derg | Edward Francis Linton | Botanical Exchange Club of The British Isles Charles Bailey Harry Corbyn Levinge | 14/7/1895 | MANCH |
| Inula salicina | IE, VCH15 South-east Galway, Lough Derg | Edward Francis Linton | Harold Stuart Thompson Harry Corbyn Levinge | 1885 | BIRM |
| Helianthemum oelandicum subsp. incanum | IE, VCH9 Co. Clare, Ballyryan | Patrick Bernard O'Kelly | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 6/1895 | BIRM |
| Helianthemum oelandicum subsp. incanum | IE, VCH9 Co. Clare, Ballyryan | Patrick Bernard O'Kelly | Harry Corbyn Levinge | 6/1895 | SLBI |
| Helianthemum oelandicum subsp. incanum | IE, VCH9 Co. Clare, Kilronan | Patrick Bernard O'Kelly | Botanical Exchange Club of The British Isles Harry Corbyn Levinge | 14/6/1894 | SLBI |
| Helianthemum canum | IE, VCH9 Co. Clare, Ballyryan | Patrick Bernard O'Kelly | Harry Corbyn Levinge William Hunt Painter | 6/1895 | ABS |
| Helianthemum canum | IE, VCH9 Co. Clare, Poulsallagh | Harry Corbyn Levinge | Dublin Museum Harry Corbyn Levinge | 19/5/1892 | GALW |
| Helianthemum canum | IE, VCH9 Co. Clare, Poulsallagh | Harry Corbyn Levinge | Dublin Museum Harry Corbyn Levinge | 19/5/1892 | GALW |
| Helianthemum canum | IE, Kilronan | Patrick Bernard O'Kelly | Harry Corbyn Levinge William Hunt Painter | 14/6/1894 | ABS |
| Habenaria viride | IE, VCH9 Co. Clare, Lisdoonvarna | Harry Corbyn Levinge | Charles Baron Clarke | 23/6/1891 | K |
| Habenaria albida | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | Arthur Bennett | 18/5/1892 | K |
| Habenaria albida | IE, VCH9 Co. Clare, Lisdoonvarna | Harry Corbyn Levinge | | 23/6/1891 | K |
| Glebionis segetum | GB, VC49 Caernarvonshire, Portmadoc | Harry Corbyn Levinge | James Sykes Gamble | 9/9/1884 | K |
| Geranium sanguineum | IE, VCH21 Co. Dublin, Howth | Harry Corbyn Levinge | Science & Art Museum Dublin Harold Stuart Thompson | 24/8/1890 | BIRM |
| Gentiana verna | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles George Stephen West Harry Corbyn Levinge | 18/5/1892 | BIRM |
| Gentiana verna | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | George Stephen West Harry Corbyn Levinge | 18/5/1892 | BIRM |
| Gentiana verna | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | William Hunt Painter | 18/5/1892 | SHYB |
| Gentiana verna | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 18/5/1892 | ABS |
| Gentiana verna | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | Charles Edgar Salmon S A Chambers | 18/5/1892 | SLBI |