| Polystichum setiferum | GB, VC6 North Somerset, Mendip Hills Cultivated | Ida Mary Roper | Harold Stuart Thompson | | BIRM |
| Plantago media | GB, VC6 North Somerset, Keynsham | Ida Mary Roper | Ida Mary Roper | 24/5/1891 | SLBI |
| Reseda lutea | GB, VC36 Herefordshire, Colwall | Ida Mary Roper | Augustin Ley | 1896 | BIRM |
| Myosurus minimus | GB, VC6 North Somerset, Portbury | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 20/5/1909 | BIRM |
| Amsinckia micrantha | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 22/5/1909 | BIRM |
| Senecio vulgaris var. radiatus | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 22/5/1909 | BIRM |
| Barbarea intermedia | GB, VC6 North Somerset, Bath, Odd Down | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 7/6/1909 | BIRM |
| Polygala calcarea | GB, VC6 North Somerset, Combe Hay | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 7/6/1909 | SLBI |
| Polygala calcarea | GB, VC6 North Somerset, Combe Hay, Bath | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 7/6/1909 | BIRM |
| Euphorbia cyparissias | GB, VC34 West Gloucestershire, Hillesley | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 12/6/1909 | BIRM |
| Bromus racemosus | GB, VC34 West Gloucestershire, Thornbury | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 14/6/1909 | BIRM |
| Carex elata | GB, VC6 North Somerset, Tickenham | Ida Mary Roper | Augustin Ley Ida Mary Roper | 15/6/1909 | BIRM |
| Carex elata | GB, VC6 North Somerset, Tickenham | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 15/6/1909 | SLBI |
| Papaver rhoeas | GB, VC8 South Wiltshire, Downton | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 21/6/1909 | BIRM |
| Sisymbrium hispanicum | GB, VC34 West Gloucestershire, Bristol, Saint Philip's Marsh | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 30/6/1909 | BIRM |
| Brassica rapa var. briggsii | GB, VC6 North Somerset, Portishead | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 1/7/1909 | BIRM |
| Ranunculus acris | GB, VC6 North Somerset, Weston-super-Mare | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 12/7/1909 | BIRM |
| 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 |
| Verbascum | GB, VC6 North Somerset, Ashton Gate | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 26/7/1909 | SLBI |
| Verbascum chaixii subsp. chaixii | GB, VC34 West Gloucestershire, Ashton Gate | Ida Mary Roper | Ida Mary Roper | 26/7/1909 | K |
| Inula helenium | GB, VC34 West Gloucestershire, Aust | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 3/8/1909 | BIRM |
| Viola hirta | GB, VC6 North Somerset, Cadbury Camp | Ida Mary Roper | Ida Mary Roper Watson Botanical Exchange Club Augustin Ley | 28/3/1910 | BIRM |
| Viola odorata x hirta = V. x scabra | GB, VC34 West Gloucestershire, Alveston Common | Ida Mary Roper | Ida Mary Roper Watson Botanical Exchange Club Augustin Ley | 30/3/1910 | BIRM |
| Viscum album | GB, VC6 North Somerset, Congresbury | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper William Robert Sherrin | 4/4/1910 | SLBI |
| Prunus spinosa x domestica = P. x fruticans | GB, VC9 Dorset, Parkstone | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley | 11/4/1910 | 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 |
| Narcissus tazetta x poeticus = N. x medioluteus | GB, VC6 North Somerset, Churchill | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 10/5/1910 | BIRM |
| Myosotis discolor | GB, VC9 Dorset, Upwey | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 17/5/1910 | BIRM |
| Dactylorhiza maculata subsp. ericetorum | GB, VC9 Dorset, West Moors | Ida Mary Roper | Augustin Ley Ida Mary Roper Watson Botanical Exchange Club | 13/6/1910 | BIRM |
| Carex divulsa subsp. divulsa | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club Frederick Janson Hanbury Ida Mary Roper | 22/6/1910 | BM |
| Carex divulsa subsp. leersii | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club Albert John Crosfield Ida Mary Roper | 22/6/1910 | BM |
| Carex divulsa subsp. leersii | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Patrick Martin Hall William Charles Barton | 22/6/1910 | BM |
| Carex divulsa subsp. leersii | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 22/6/1910 | E |
| Carex divulsa subsp. leersii | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 22/6/1910 | BIRM |
| Carex muricata subsp. pairae | GB, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Richard Barker Ullman Botanical Exchange Club of The British Isles Patrick Martin Hall | 22/6/1910 | SLBI |
| Rosa canina | GB, VC34 West Gloucestershire, Pucklechurch | Ida Mary Roper | Watson Botanical Exchange Club | 27/6/1910 21/9/1910 | SLBI |
| Carex hirta | GB, VC34 West Gloucestershire, Tytherington | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Richard Spiers Standen | 12/7/1910 | BM |
| Carex hirta | GB, VC34 West Gloucestershire, Tytherington | Ida Mary Roper | Royal Botanic Gardens, Kew Watson Botanical Exchange Club Ida Mary Roper | 12/7/1910 | E |
| Carex hirta | GB, VC34 West Gloucestershire, Tytherington | Ida Mary Roper | Watson Botanical Exchange Club Arthur Bennett Ida Mary Roper Charles Edgar Salmon | 12/7/1910 | BM |
| Epilobium lanceolatum | GB, VC34 West Gloucestershire, Winterbourne, Ivory Hill | Ida Mary Roper | Watson Botanical Exchange Club Augustin Ley Ida Mary Roper | 16/7/1910 | BIRM |