| Potamogeton coloratus | IE, VCH28 Co. Sligo, Coolgagh Loch | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 4/8/1883 | MANCH |
| Potamogeton obtusifolius | IE, VCH38 Co. Down, Comber | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 27/7/1884 | MANCH |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Charles Bailey | 15/6/1885 | MANCH |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Charles Bailey | 15/6/1885 | MANCH |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Charles Bailey | 15/6/1885 | MANCH |
| Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 15/6/1885 | BIRM |
| Euphorbia hyberna | IE, Kerry, Cromaglan Mountain | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby | 15/6/1885 | SLBI |
| Euphorbia hyberna | IE, Kerry, Cromaglan Mountain | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles | 15/6/1885 | ABS |
+ | Euphorbia hyberna | IE, VCH2 North Kerry, Killarney,Cromagloun (Cromaglan) | Samuel Alexander Stewart | Coslett Herbert Waddell Elizabeth Anne Lomax | 18/6/1885 | MANCH |
| Euphorbia hyberna | IE, Kerry, Cromaglan Mountain | Samuel Alexander Stewart | | 18/6/1885 | ABS |
| Saxifraga hirsuta | IE, Kerry, Cromaglan Mountain | Samuel Alexander Stewart | Samuel Alexander Stewart William Hunt Painter | 18/6/1885 | ABS |
| Pinguicula grandiflora | IE, Kerry, Mangerton | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby | 22/6/1885 | SLBI |
| Pinguicula grandiflora | IE, VCH1 South Kerry, Mangerton | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 25/6/1885 | BIRM |
| Sagina maritima | IE, VCH2 North Kerry, Ballybunnion | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Charles Cardale Babington | 25/7/1885 | ABS |
| Sagina maritima | IE, VCH2 North Kerry, Ballybunnion | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 25/7/1885 | BIRM |
| Mentha aquatica x spicata = M. x piperita | IE, VCH39 Co. Antrim, Masserine Park | Samuel Alexander Stewart | | 2/8/1885 | DBN |
+ | Viola tricolor | IE, VCH39 Co. Antrim, Lough Neagh | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles | 25/6/1886 | MANCH |
| Viola tricolor subsp. curtisii | IE, VCH39 Co. Antrim, Antrim | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby John Gilbert Baker | 25/6/1886 | SLBI |
| Viola tricolor subsp. curtisii | IE, VCH39 Co. Antrim, Lough Neagh | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 25/6/1886 | BIRM |
| Alchemilla filicaulis | IE, VCH39 Co. Antrim, Cave Hill | Samuel Alexander Stewart | William Hunt Painter | 5/7/1886 | ABS |
+ | Groenlandia densa | IE, VCH8 Co. Limerick, Ferry Bridge | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 3/8/1886 | MANCH |
| Bidens cernua | IE, VCH39 Co. Antrim, Portmore Lough | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 27/8/1886 | BIRM |
| Apium inundatum | IE, VCH38 Co. Down, Downpatrick | Samuel Alexander Stewart | | 16/9/1886 | SLBI |
| Apium nodiflorum x inundatum = A. x moorei | IE, VCH38 Co. Down, Downpatrick | Samuel Alexander Stewart | Botanical Exchange Club Charles Bailey | 16/9/1886 | MANCH |
+ | Apium nodiflorum x inundatum = A. x moorei | IE, VCH38 Co. Down, Downpatrick,Quoile | Samuel Alexander Stewart | Charles Bailey | 16/9/1886 | MANCH |
| Najas flexilis | IE, VCH16 West Galway, Roundstone | Samuel Alexander Stewart | William Hadden Beeby Arthur Bennett | 15/8/1887 | SLBI |
+ | Orobanche purpurea | GB, VC10 Isle of Wight, Totland,Lacy's Farm | Samuel Alexander Stewart | Charles Bailey | 7/1888 | MANCH |
| Mertensia maritima | IE, VCH38 Co. Down, Glassdrummond | Samuel Alexander Stewart | | 23/6/1889 | SLBI |
| Hieracium basalticola | IE, VCH39 Co. Antrim, Sallagh Braes | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles William Hadden Beeby | 15/6/1890 | SLBI |
+ | Hieracium basalticola | IE, VCH39 Co. Antrim, Sallagh Braes | Samuel Alexander Stewart | | 15/6/1890 | BIRM |
| Hieracium basalticola | IE, VCH39 Co. Antrim, Sallagh Braes | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Frederick Townsend | 15/6/1890 | SLBI |
| Hieracium latobrigorum | IE, VCH39 Co. Antrim, Cranfield | Samuel Alexander Stewart | | 27/7/1890 | SLBI |
| Potamogeton alpinus | IE, VCH38 Co. Down, Newcastle | Samuel Alexander Stewart | Alfred Fryer Charles Bailey | 8/8/1890 | MANCH |
| Sesleria caerulea | IE, Galway, Galway Bay | Samuel Alexander Stewart | Botanical Exchange Club of The British Isles Augustin Ley | 5/1891 | BIRM |
| Primula vulgaris x veris = P. x polyantha | IE, VCH16,VCH17, Salt Hill | Samuel Alexander Stewart | | 14/5/1891 | MANCH |
| Viola | IE, VCH9 Co. Clare, Gort | Samuel Alexander Stewart | Augustin Ley | 22/5/1891 | BIRM |
| Viola persicifolia | IE, VCH9 Co. Clare, Gort | Samuel Alexander Stewart | William Hadden Beeby | 22/5/1891 | SLBI |
| Hieracium stewartii | IE, VCH38 Co. Down, Hilltown | Samuel Alexander Stewart | | 23/7/1891 | ABS |
| Hieracium friesii | IE, VCH38 Co. Down, Hilltown | Samuel Alexander Stewart | William Hadden Beeby | 24/7/1891 | SLBI |
| Hieracium gothicoides | IE, VCH38 Co. Down, Hilltown | Samuel Alexander Stewart | | 24/7/1891 | ABS |