| Scleranthus annuus | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Watson Botanical Exchange Club | 9/1903 | K |
| Mentha | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 10/1894 | K |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 2/10/1894 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH38 Co. Down, Bryansford Cultivated | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell | 8/1895 | LIV |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | | 2/10/1894 | LIV |
+ | Muscari neglectum | GB, VC15 East Kent, Luddenham | Frederic Henry Ward | Coslett Herbert Waddell Elizabeth Anne Lomax | 18/5/1887 | MANCH |
| Potamogeton polygonifolius | GB, VC25 East Suffolk, Belton | George Fitt | Charles Cardale Babington Coslett Herbert Waddell | 7/1843 | MANCH |
+ | Helianthemum oelandicum subsp. levigatum | GB, VC65 North-west Yorkshire, Middleton in Teesdale,Cronkley Fell | Henry Elliott Fox | Botanical Exchange Club of The British Isles Coslett Herbert Waddell Elizabeth Anne Lomax | 2/7/1886 | MANCH |
+ | Cerastium arcticum | GB, VC92 South Aberdeenshire, Braemar,Craig-na-dal-beag | Augustin Ley | Coslett Herbert Waddell Elizabeth Anne Lomax | 14/7/1876 | MANCH |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Coslett Herbert Waddell Elizabeth Anne Lomax | 18/6/1885 | MANCH |
| Potamogeton gramineus x perfoliatus = P. x nitens | IE, VCH38 Co. Down, magheralin | Coslett Herbert Waddell | Botanical Exchange Club of The British Isles Charles Bailey Coslett Herbert Waddell | 7/1904 | MANCH |
+ | Viola tricolor | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Botanical Exchange Club of The British Isles Charles Bailey Coslett Herbert Waddell | 4/10/1910 | MANCH |
+ | Mentha suaveolens x longifolia = M. x rotundifolia | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Charles Bailey | 8/1895 | MANCH |
+ | Calamagrostis stricta | IE, VCH39 Co. Antrim, Lough Neagh | Coslett Herbert Waddell Nathaniel Carrothers | Watson Botanical Exchange Club Charles Bailey Coslett Herbert Waddell | 29/7/1911 | MANCH |
+ | Euphrasia nemorosa x brevipila | IE, Nantenan, near Askeaton, co. Limerick. [H8] | Coslett Herbert Waddell | | 11/9/1905 | MANCH |
| Lemna gibba | GB, VC37 Worcestershire, Ripple | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell | 8/1898 | SHYB |
| Rubus rogersii | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Coslett Herbert Waddell Charles Edgar Salmon | 27/8/1894 1/9/1894 | SHYB |
| Astragalus danicus | GB, VC29 Cambridgeshire, Gog Magog | George Goode | Allan Octavian Hume Coslett Herbert Waddell | 6/1892 | SLBI |
| Rubus vestitus | GB, VC69 Westmorland, Kendal | Coslett Herbert Waddell | Allan Octavian Hume | 7/1895 | SLBI |
| Rosa glauca var. coriifolia | GB, VC69 Westmorland, Kentmere | Coslett Herbert Waddell | | 14/8/1899 | SLBI |
| Rubus vestitus | GB, VC69 Westmorland, Serpentine Wood | Coslett Herbert Waddell | Coslett Herbert Waddell | 7/1895 | SLBI |
| Rubus leptothyrsos | GB, VC77 Lanarkshire, New Monkland | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 21/7/1898 | SLBI |
| Rubus errabundus | GB, VC86 Stirlingshire, Stirling Castle | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell | 25/7/1890 | SLBI |
| Zannichellia polycarpa | IE, VCH38,VCH39, Belfast | Coslett Herbert Waddell Samuel Alexander Stewart | Allan Octavian Hume Coslett Herbert Waddell | 7/1904 | SLBI |
| Zannichellia polycarpa | IE, VCH38,VCH39, Belfast | Coslett Herbert Waddell Samuel Alexander Stewart | Allan Octavian Hume Coslett Herbert Waddell | 7/1904 | SLBI |
| Eriocaulon aquaticum | IE, VCH16,VCH17, Lough Corrib | Samuel Arthur Brennan | Watson Botanical Exchange Club Coslett Herbert Waddell William Robert Sherrin | 8/1895 | SLBI |
| Saxifraga sponhemica | IE, VCH6 Co. Waterford, Lough Coumshigaun | Coslett Herbert Waddell Henry William Lett | Allan Octavian Hume Coslett Herbert Waddell | 7/1892 | SLBI |
| Euphrasia salisburgensis | IE, VCH8 Co. Limerick, Askeaton | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell | 7/1900 | SLBI |
| Euphrasia salisburgensis | IE, VCH8 Co. Limerick, Askeaton,Nantinan | Coslett Herbert Waddell | Allan Octavian Hume | 11/8/1905 | SLBI |
| Crepis capillaris | IE, VCH19 Co. Kildare, Grey Abbey | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell William Robert Sherrin | 5/7/1913 | SLBI |
| Carex elata | IE, VCH32 Co. Monaghan, Rossmore | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 3/7/1900 | SLBI |
| Pyrola media | IE, VCH36 Tyrone, Kildress | Samuel Arthur Brennan | Watson Botanical Exchange Club Coslett Herbert Waddell | 7/1897 | SLBI |
| Lathyrus palustris | IE, VCH37 Co. Armagh, Lough Neagh | S A Blenan | Watson Botanical Exchange Club Coslett Herbert Waddell William Robert Sherrin | 5/7/1865 | SLBI |
| Rubus lettii | IE, VCH38 Co. Down, Aghaderg Glebe | Coslett Herbert Waddell Henry William Lett | Allan Octavian Hume Coslett Herbert Waddell | 1/7/1896 | SLBI |
| Callitriche hermaphroditica | IE, VCH38 Co. Down, Aughnadarragh | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 8/1896 | SLBI |
| Polygonum aviculare var. littorale | IE, VCH38 Co. Down, Ballywalter | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell William Robert Sherrin | 21/9/1917 | SLBI |
| Zannichellia polycarpa | IE, VCH38 Co. Down, Belfast | Coslett Herbert Waddell | Croydon Natural History and Scientific Society Watson Botanical Exchange Club Coslett Herbert Waddell Henry Franklin Parsons | 8/1900 | SLBI |
| Zannichellia polycarpa | IE, VCH38 Co. Down, Belfast | Coslett Herbert Waddell Samuel Alexander Stewart | Allan Octavian Hume Coslett Herbert Waddell | 7/1904 | SLBI |
| Rubus ulmifolius | IE, VCH38 Co. Down, Crossgar | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 6/8/1895 | SLBI |
| Rubus wirralensis | IE, VCH38 Co. Down, Crossgar | Coslett Herbert Waddell | Allan Octavian Hume | 6/8/1895 | SLBI |