| Dryopteris affinis | IE, VCH23 Westmeath, Quarry Bog | Edward Francis Linton | Harry Corbyn Levinge William Hunt Painter | 19/7/1895 | ABS |
| Equisetum variegatum | IE, VCH23 Westmeath, Killucan | Harry Corbyn Levinge | George Goode Harold Stuart Thompson | 29/4/1892 | BIRM |
| Erica carnea | IE, VCH16 West Galway, Roundstone | Harry Corbyn Levinge | S A Chambers | 14/9/1891 | SLBI |
| Erica erigena | IE, VCH16 West Galway, Roundstone | B King | Harold Stuart Thompson Harry Corbyn Levinge | 18/4/1892 | BIRM |
| Erica mackaiana | IE, VCH16 West Galway, Roundstone | Harry Corbyn Levinge | William Hadden Beeby | 14/9/1891 | SLBI |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Bolton King | Harry Corbyn Levinge | 27/8/1892 | ABS |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Bolton King | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 27/8/1892 | BIRM |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Harry Corbyn Levinge | Augustin Ley Harry Corbyn Levinge | 14/9/1891 | BIRM |
| Erica mackaiana | IE, VCH16 West Galway, Craiggamore | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles William Hunt Painter | 14/9/1891 | ABS |
| Erica mackaiana | IE, VCH16 West Galway, Roundstone | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 14/9/1891 | ABS |
| Festuca altissima | IE, VCH23 Westmeath, Knock | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 17/6/1892 | ABS |
| Festuca arundinacea | IE, VCH23 Westmeath, Knock Drui, Co. West Meath | Harry Corbyn Levinge | | 4/8/1884 | K |
| 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 |
| Galeopsis tetrahit | GB, VC49 Caernarvonshire, Criccieth | Harry Corbyn Levinge | James Sykes Gamble | 8/1884 | K |
| Galium mollugo var. insubricum | IE, VCH21 Co. Dublin, Hough | Harry Corbyn Levinge | Augustin Ley Harry Corbyn Levinge Arthur Bennett | 15/6/1891 to 11/7/1891 | BIRM |
| Galium mollugo var. insubricum | IE, VCH21 Co. Dublin, Howth | Harry Corbyn Levinge | Botanical Exchange Club of The British Isles Augustin Ley Harry Corbyn Levinge | 24/6/1892 | BIRM |
| Galium mollugo subsp. mollugo | IE, VCH21 Co. Dublin, Howth | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 15/6/1891 | ABS |
| Galium palustre subsp. elongatum | IE, VCH23 Westmeath, Knock Drin | Harry Corbyn Levinge | Harry Corbyn Levinge William Hunt Painter | 8/8/1892 | ABS |
| Galium parisiense var. anglicum | IE, VCH9 Co. Clare, Ballyvaughan | Harry Corbyn Levinge | Harold Stuart Thompson Harry Corbyn Levinge | 2/6/1891 | 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 |
| Geranium sanguineum | IE, VCH21 Co. Dublin, Howth | Harry Corbyn Levinge | Science & Art Museum Dublin Harold Stuart Thompson | 24/8/1890 | BIRM |
| Glebionis segetum | GB, VC49 Caernarvonshire, Portmadoc | Harry Corbyn Levinge | James Sykes Gamble | 9/9/1884 | 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 |
| Habenaria viride | IE, VCH9 Co. Clare, Lisdoonvarna | Harry Corbyn Levinge | Charles Baron Clarke | 23/6/1891 | K |
| 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 |
| Helianthemum canum | IE, VCH9 Co. Clare, Ballyryan | Patrick Bernard O'Kelly | Harry Corbyn Levinge William Hunt Painter | 6/1895 | ABS |
| 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 |
| 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, 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 | Harold Stuart Thompson Harry Corbyn Levinge | 1885 | BIRM |