| Ranunculus ficaria | GB, VC6 North Somerset, Kingsweston | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 5/5/1927 | SLBI |
| Ranunculus fluitans | GB, VC52 Anglesey, Llyn Coron | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 30/4/1925 | SLBI |
| Rosa canina var. borreri | GB, VC34 West Gloucestershire, Charfield | Ida Mary Roper | Watson Botanical Exchange Club | 17/7/1918 | SLBI |
| Rosa canina | GB, VC34 West Gloucestershire, Pucklechurch | Ida Mary Roper | Watson Botanical Exchange Club | 27/6/1910 21/9/1910 | SLBI |
| Rosa canina | GB, VC34 West Gloucestershire, Westerleigh | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 17/8/1921 | SLBI |
| Rosa canina subsp. lutetiana | GB, VC34 West Gloucestershire, Almondsbury | Ida Mary Roper | Watson Botanical Exchange Club | 25/6/1926 to 13/9/1926 | SLBI |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC62 North-east Yorkshire, Pickering | Ida Mary Roper | Watson Botanical Exchange Club | 17/9/1930 | SLBI |
| Rosa canina x obtusifolia = R. x dumetorum | GB, VC34 West Gloucestershire, Bristol,Filton | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 8/7/1928 to 11/9/1928 | SLBI |
| 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, VC34 West Gloucestershire, Bristol | Ida Mary Roper | Watson Botanical Exchange Club | 11/6/1918 to 19/9/1918 | 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 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, VC34 West Gloucestershire, Filton | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 8/7/1928 11/9/1928 | SLBI |
| Rosa canina x tomentosa = R. x scabriuscula | GB, VC48 Merionethshire, Llanbedr | Ida Mary Roper | Watson Botanical Exchange Club | 20/8/1931 | SLBI |
| Rosa micrantha | GB, VC13 West Sussex, Arundel | Ida Mary Roper | Watson Botanical Exchange Club Job Edward Lousley | 2/10/1925 | SLBI |
| Rosa micrantha | GB, VC13 West Sussex, Arundel | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 2/10/1928 | SLBI |
| Rosa mollis var. caerulea | GB, VC88 Mid Perthshire, Tyndrum | Ida Mary Roper | Watson Botanical Exchange Club | 4/8/1929 | SLBI |
| Rosa rubiginosa | GB, VC26 West Suffolk, Barton Mills | Ida Mary Roper | Watson Botanical Exchange Club | 21/8/1930 | SLBI |
| Rosa rubiginosa | GB, VC26 West Suffolk, Barton Mills | Ida Mary Roper | Watson Botanical Exchange Club | 21/8/1930 | SLBI |
| Rosa spinosissima x mollis = R. x sabinii | GB, Kent, Halling | Ida Mary Roper | Watson Botanical Exchange Club | 1/6/1923 | SLBI |
| Rosa stylosa var. virginea | GB, VC34 West Gloucestershire, Hallen Marsh | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 2/7/1921 27/9/1921 | SLBI |
| Rosa stylosa var. systyla | GB, VC34 West Gloucestershire, Hallen | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 29/6/1923 22/9/1923 | SLBI |
| Rubus caesius | GB, VC34 West Gloucestershire, Tockington | | Watson Botanical Exchange Club Ida Mary Roper | 14/8/1924 | SLBI |
| Ruppia spiralis | GB, VC6 North Somerset, Kingston Seymour | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 21/9/1920 | SLBI |
| Salix viminalis x caprea = S. x smithiana | GB, VC34 West Gloucestershire, Westerleigh | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 20/4/1921 17/8/1921 | SLBI |
| Sambucus nigra | GB, VC6 North Somerset, Weston in Gordano | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 28/9/1918 | SLBI |
| Scutellaria altissima | GB, VC6 North Somerset, Mells | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 9/7/1932 | SLBI |
| Senecio vulgaris | GB, VC6 North Somerset, Kewstoke | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 29/4/1918 | SLBI |
| Silene dioica | GB, VC34 West Gloucestershire, Hallen | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 15/5/1922 | SLBI |
| Sonchus asper | GB, VC34 West Gloucestershire, Wickwar | Ida Mary Roper | Watson Botanical Exchange Club Job Edward Lousley | 20/7/1927 | SLBI |
| Sonchus asper | GB, VC34 West Gloucestershire, Wickwar | | Watson Botanical Exchange Club Ida Mary Roper Isaac A Helsby | 20/7/1927 | SLBI |
| Symphytum tuberosum | GB, VC34 West Gloucestershire, Compton Greenfield | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 11/5/1921 | SLBI |
| Trifolium hybridum | GB, VC34 West Gloucestershire, Avonmouth Docks, Bristol | Ida Mary Roper | Watson Botanical Exchange Club | 11/8/1920 | SLBI |
| Ulmus minor subsp. angustifolia | GB, VC6 North Somerset, Wraxall | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 3/3/1926 13/4/1926 26/7/1926 | SLBI |
| Verbascum blattaria | GB, VC34 West Gloucestershire, Henbury | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 16/8/1913 | SLBI |
| Veronica anagallis-aquatica | GB, VC9 Dorset, Bere Regis | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 22/6/1921 | SLBI |
| Veronica persica | GB, VC3 South Devon, Pocombe | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 4/6/1933 | SLBI |
| Veronica persica var. kochiana | GB, VC3 South Devon, Exeter | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 4/6/1933 | K |
| Viola hirta | GB, VC6 North Somerset, Wraxall | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper | 2/5/1928 29/6/1928 | SLBI |
| Viola hirta | GB, VC6 North Somerset, Wraxall | Ida Mary Roper | Watson Botanical Exchange Club Ida Mary Roper Job Edward Lousley | 2/5/1928 29/5/1928 | SLBI |