| Circaea lutetiana x alpina = C. x intermedia | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell Harold Stuart Thompson | | BIRM |
| Potamogeton polygonifolius | GB, VC25 East Suffolk, Belton | George Fitt | Charles Cardale Babington Coslett Herbert Waddell | 7/1843 | MANCH |
| 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 |
+ | Cerastium arcticum | GB, VC92 South Aberdeenshire, Braemar,Craig-na-dal-beag | Augustin Ley | Coslett Herbert Waddell Elizabeth Anne Lomax | 14/7/1876 | MANCH |
| Anthoxanthum aristatum subsp. puelii | GB, VC17 Surrey, Thames Ditton,Weston Green | Coslett Herbert Waddell | Botanical Exchange Club of The British Isles Augustin Ley | 9/1879 | BIRM |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Coslett Herbert Waddell Elizabeth Anne Lomax | 18/6/1885 | 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 |
+ | Muscari neglectum | GB, VC15 East Kent, Luddenham | Frederic Henry Ward | Coslett Herbert Waddell Elizabeth Anne Lomax | 18/5/1887 | MANCH |
| Rubus errabundus | GB, VC86 Stirlingshire, Stirling Castle | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell | 25/7/1890 | SLBI |
| Setaria viridis | GB, VC21 Middlesex, Staines | E Ferguson Shepherd | Watson Botanical Exchange Club Coslett Herbert Waddell Harold Stuart Thompson | 10/1890 | BIRM |
| Astragalus danicus | GB, VC29 Cambridgeshire, Gog Magog | George Goode | Allan Octavian Hume Coslett Herbert Waddell | 6/1892 | SLBI |
| Saxifraga sponhemica | IE, VCH6 Co. Waterford, Lough Coumshigaun | Coslett Herbert Waddell Henry William Lett | Allan Octavian Hume Coslett Herbert Waddell | 7/1892 | SLBI |
| Isoetes lacustris | IE, VCH20,VCH21, Lough Bray Upper | Coslett Herbert Waddell | Coslett Herbert Waddell Harold Stuart Thompson | 29/7/1893 | BIRM |
| Myosotis ramosissima | IE, VCH38 Co. Down, Kirkistown | Coslett Herbert Waddell | Belfast | 5/1894 | GALW |
| Rubus mucronulatus | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Watson Botanical Exchange Club Charles Edgar Salmon Coslett Herbert Waddell | 9/8/1894 | ABS |
| Rubus corylifolius | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Allan Octavian Hume Coslett Herbert Waddell | 21/8/1894 | SLBI |
| Rubus leyanus | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Coslett Herbert Waddell | 21/8/1894 | ABS |
| Rubus rogersii | IE, VCH38 Co. Down, Saintfield | Coslett Herbert Waddell | Coslett Herbert Waddell Charles Edgar Salmon | 27/8/1894 1/9/1894 | SHYB |
| Mentha arvensis x aquatica x spicata = M. x smithiana | IE, VCH38 Co. Down, Saintfield Cultivated | Coslett Herbert Waddell | Coslett Herbert Waddell | 9/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul Cultivated | Coslett Herbert Waddell | Coslett Herbert Waddell Robert Lloyd Praeger | 9/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 9/1894 | DBN |
| Mentha suaveolens x longifolia = M. x rotundifolia | IE, VCH38 Co. Down, Saul Cultivated | Coslett Herbert Waddell | Coslett Herbert Waddell William Hunt Painter | 9/1894 | ABS |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul Cultivated | Coslett Herbert Waddell | Alexander Goodman More Coslett Herbert Waddell | 21/9/1894 | DBN |
| Mentha | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 10/1894 | K |
| Mentha aquatica x spicata = M. x piperita | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Alexander Goodman More Coslett Herbert Waddell | 2/10/1894 | DBN |
| Mentha aquatica x spicata = M. x piperita | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | | 2/10/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 2/10/1894 | CGE |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | National Museum Ireland Alexander Goodman More Coslett Herbert Waddell | 2/10/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Alexander Goodman More Coslett Herbert Waddell | 2/10/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | | 2/10/1894 | DBN |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | | 2/10/1894 | LIV |
| Mentha spicata x suaveolens = M. x villosa | IE, VCH38 Co. Down, Saul | Coslett Herbert Waddell | Coslett Herbert Waddell | 2/10/1894 | K |
| Carex ornithopoda | GB, VC69 Westmorland, Scout Scar | Coslett Herbert Waddell | Coslett Herbert Waddell Harold Stuart Thompson | 7/1895 | BIRM |
| Hieracium hypochaeroides | GB, VC69 Westmorland, Kendal | Coslett Herbert Waddell | Coslett Herbert Waddell | 7/1895 | ABS |
| Inula salicina | IE, VCH10 North Tipperary, Lough Derg | C F Lilly | Watson Botanical Exchange Club Augustin Ley Coslett Herbert Waddell | 7/1895 | BIRM |
| Rubus vestitus | GB, VC69 Westmorland, Kendal | Coslett Herbert Waddell | Allan Octavian Hume | 7/1895 | SLBI |
| Rubus vestitus | GB, VC69 Westmorland, Serpentine Wood | Coslett Herbert Waddell | Coslett Herbert Waddell | 7/1895 | SLBI |
| Eriocaulon aquaticum | IE, VCH16,VCH17, Lough Corrib | Samuel Arthur Brennan | Watson Botanical Exchange Club Coslett Herbert Waddell William Robert Sherrin | 8/1895 | SLBI |
| Mentha aquatica x spicata = M. x piperita | IE, VCH39 Co. Antrim, Carnmoney | Coslett Herbert Waddell | Watson Botanical Exchange Club Coslett Herbert Waddell Spencer Henry Bickham | 8/1895 | CGE |
| 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 |