| Veronica agrestis | GB, VC6 North Somerset, Hallatrow | Ida Mary Roper | Botanical Society & Exchange Club of The British Isles Charles Edward Britton Ida Mary Roper | 25/6/1930 | K |
| Veronica agrestis | GB, VC6 North Somerset, Hallatrow | Ida Mary Roper | Botanical Exchange Club of The British Isles Ida Mary Roper George Claridge Druce | 25/6/1930 | K |
| Veronica agrestis | GB, VC6 North Somerset, Hallatrow | Ida Mary Roper | Isaac A Helsby | 25/6/1930 | SLBI |
| Viola odorata x hirta = V. x scabra | GB, VC6 North Somerset, Hallatrow | Ida Mary Roper | Ida Mary Roper | 23/12/1926 14/6/1927 | SLBI |
| Salix fragilis x alba = S. x rubens | GB, VC6 North Somerset, Kenn | Ida Mary Roper | Watson Botanical Exchange Club Edward Francis Linton Ida Mary Roper Joseph Edward Little | 22/5/1915 to 17/8/1915 | CGE |
| Senecio vulgaris | GB, VC6 North Somerset, Kewstoke | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 29/4/1918 | SLBI |
| Plantago media | GB, VC6 North Somerset, Keynsham | Ida Mary Roper | Ida Mary Roper | 24/5/1891 | SLBI |
| Salix triandra | GB, VC6 North Somerset, Keynsham | Ida Mary Roper | Watson Botanical Exchange Club Harold Stuart Thompson Ida Mary Roper | 11/5/1917 21/6/1917 | BIRM |
| Ranunculus acris var. boraeanus | GB, VC6 North Somerset, Kingston Seymour | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 22/5/1915 | SLBI |
| Ruppia cirrhosa | GB, VC6 North Somerset, Kingston Seymour | Ida Mary Roper | | 21/9/1920 | BIRM |
| Ruppia spiralis | GB, VC6 North Somerset, Kingston Seymour | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 21/9/1920 | SLBI |
| Ranunculus ficaria | GB, VC6 North Somerset, Kingsweston | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 5/5/1927 | SLBI |
| Populus tremula var. villosa | GB, VC6 North Somerset, Leigh Woods | Ida Mary Roper | Ida Mary Roper William Robert Sherrin | 23/6/1915 4/12/1915 | SLBI |
| Veronica spicata | GB, VC6 North Somerset, Leigh Woods | Ida Mary Roper | Botanical Exchange Club of The British Isles Charles Edward Britton Ida Mary Roper | 7/8/1918 | K |
| Polypodium vulgare | GB, VC6 North Somerset, Markham Bottom | Ida Mary Roper | Watson Botanical Exchange Club Harold Stuart Thompson Ida Mary Roper | 10/12/1921 | BIRM |
| Scutellaria altissima | GB, VC6 North Somerset, Mells | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 9/7/1932 | SLBI |
| Phyllitis scolopendrium | GB, VC6 North Somerset, Mendip Hills | Ida Mary Roper | Harold Stuart Thompson | 11/1925 | BIRM |
| Polystichum setiferum | GB, VC6 North Somerset, Mendip Hills Cultivated | Ida Mary Roper | Harold Stuart Thompson | | BIRM |
| Arctium minus | GB, VC6 North Somerset, Midford | Ida Mary Roper | Watson Botanical Exchange Club William Robert Sherrin | 27/7/1914 | SLBI |
| Alnus glutinosa | GB, VC6 North Somerset, Nailsea | Ida Mary Roper | Ida Mary Roper | 20/3/1920 | SLBI |
| Alnus glutinosa | GB, VC6 North Somerset, Nailsea | Ida Mary Roper | Ida Mary Roper | 24/9/1920 | SLBI |
| Alnus glutinosa | GB, VC6 North Somerset, Nailsea | Ida Mary Roper | Watson Botanical Exchange Club Harold Stuart Thompson | 20/3/1920 to 24/9/1920 | BIRM |
| Carex otrubae | GB, VC6 North Somerset, Nailsea | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 28/6/1930 | SLBI |
| Carex otrubae | GB, VC6 North Somerset, Nailsea Ponds | Ida Mary Roper | Reading University Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 28/6/1930 | E |
| Carex vulpina | GB, VC6 North Somerset, Nailsea Ponds | Ida Mary Roper | Watson Botanical Exchange Club Eric Frederic Drabble Hilda Lake Drabble Ida Mary Roper | 28/6/1930 | BM |
| Carex vulpina | GB, VC6 North Somerset, Nailsea Ponds | Ida Mary Roper | Watson Botanical Exchange Club | 28/6/1930 | BIRM |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC6 North Somerset, Nailsea Ponds | Ida Mary Roper | Watson Botanical Exchange Club | 28/6/1930 | SLBI |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC6 North Somerset, Nailsea Ponds | Ida Mary Roper | | 28/6/1930 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC6 North Somerset, Newton Saint Loe | Ida Mary Roper | Watson Botanical Exchange Club Spencer Henry Bickham | 13/9/1916 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC6 North Somerset, Newton Saint Loe | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 13/9/1916 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC6 North Somerset, Newton St Loe | Ida Mary Roper | Watson Botanical Exchange Club Harold Stuart Thompson Ida Mary Roper | 13/9/1916 | BIRM |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC6 North Somerset, Pensford | Ida Mary Roper | Watson Botanical Exchange Club | 22/6/1926 to 24/9/1926 | SLBI |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC6 North Somerset, Pensford | Ida Mary Roper | Watson Botanical Exchange Club | 22/6/1926 to 24/9/1926 | SLBI |
| Rosa stylosa var. systyla | GB, VC6 North Somerset, Pensford | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 15/7/1909 | SLBI |
| Salix viminalis x caprea = S. x smithiana | GB, VC6 North Somerset, Pensford | Ida Mary Roper | Botanical Exchange Club of The British Isles Ida Mary Roper J Fraser Spencer Henry Bickham | 30/3/1927 to 22/6/1927 | CGE |
| Myosurus minimus | GB, VC6 North Somerset, Portbury | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 20/5/1909 | BIRM |
| Ribes uva-crispa | GB, VC6 North Somerset, Portbury | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 30/4/1910 | SLBI |
| Amsinckia micrantha | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 22/5/1909 | BIRM |
| Brassica rapa var. briggsii | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 1/7/1909 | BIRM |
| Calamintha arvensis | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Harold Stuart Thompson | 12/6/1918 | BIRM |