| Caltha palustris var. radicans | GB, VC89 East Perthshire, Glas Maol | Edward Francis Linton | Botanical Society of The British Isles Allan Octavian Hume Edward Francis Linton Frederick Townsend | 3/8/1883 | SLBI |
| Ceratophyllum demersum | GB, VC29,VC31, Bluntisham | Alfred Fryer | Botanical Society of The British Isles Alfred Fryer William Hadden Beeby | 24/8/1887 | SLBI |
| Epilobium hirsutum x montanum = E. x erroneum | GB, VC57 Derbyshire, Mytham Bridge | William Richardson Linton | Botanical Society of The British Isles William Hunt Painter | 25/8/1896 | ABS |
| Stachys | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 20/7/1904 | K |
| Glebionis segetum | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 26/7/1905 | K |
| Luzula forsteri | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 26/4/1906 | SLBI |
| Ajuga reptans | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 14/5/1906 | K |
| Orchis mascula | GB, VC14 East Sussex, Ashurst Wood | Florence Potter | Botanical Society of The British Isles Christopher Robert Billups | 15/5/1907 | SLBI |
| Euphorbia esula x waldsteinii = E. x pseudovirgata | GB, VC19 North Essex, Colchester | George Charles Brown | Botanical Society of The British Isles George Charles Brown Job Edward Lousley | 29/5/1927 | SLBI |
| Scutellaria minor | GB, VC17 Surrey, Epsom Common | Charles Edward Britton | Botanical Society of The British Isles Edward Charles Wallace | 1/9/1928 | K |
| Carex divulsa | GB, VC13 West Sussex, Horsham | Edward Charles Wallace | Botanical Society of The British Isles Edward Charles Wallace Harold Stuart Thompson | 29/7/1934 | BIRM |
| Rosa stylosa x canina = R. x andegavensis | GB, VC23 Oxfordshire, Bampton | Percival George Beak | Botanical Society of The British Isles | 8/1934 | SLBI |
| Baldellia ranunculoides | GB, VC96 East Inverness-shire, Beauly,Beauly River | Thomas Gaskell Tutin | Botanical Society of The British Isles University of Leicester | 17/7/1947 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC65 North-west Yorkshire, Tanfield | Catherine Muriel Rob | Botanical Society of The British Isles Catherine Muriel Rob | 20/7/1947 | MANCH |
| Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Nunwick | Catherine Muriel Rob | Botanical Society of The British Isles Druce Herbarium, Oxford Catherine Muriel Rob | 11/9/1947 | OXF |
+ | Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Ripon (near),River Ure | Catherine Muriel Rob | Botanical Society of The British Isles Sledge | 11/9/1947 | MANCH |
+ | Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Ripon (near),River Ure | Catherine Muriel Rob | Botanical Society of The British Isles Sledge | 11/9/1947 | MANCH |
| Carex canescens | GB, VC62 North-east Yorkshire, Gormire Lake | Robert Lewis | Botanical Society of The British Isles | 17/5/1948 | BM |
| Carex canescens | GB, VC62 North-east Yorkshire, Gormire Lake | Robert Lewis | Botanical Society of The British Isles Donald Peter Young | 17/5/1948 | BM |
| Carex divulsa | GB, VC29 Cambridgeshire, Cott Farm | John Patrick Micklethwait Brenan | Botanical Society of The British Isles John Patrick Micklethwait Brenan Martin F Gardner & Sabina G Knees | 29/5/1948 | E |
| Carex divulsa subsp. divulsa | GB, VC39 Staffordshire, Marchington | Eric Smoothy Edees | Botanical Society of The British Isles | 9/8/1948 | BM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC13 West Sussex, Bexley Hill | Edward Charles Wallace | Botanical Society of The British Isles | 22/8/1948 | SLBI |
| Mentha gentilis var. varigata | GB, VC13 West Sussex, Bexley Hill | Edward Charles Wallace | Botanical Society of The British Isles | 22/8/1948 | K |
| Mentha spicata | GB, VC1 West Cornwall, Perranzabuloe,Lambourne Hill | Francis Rilstone | Botanical Society of The British Isles | 23/8/1948 | K |
| Stachys | GB, VC1 West Cornwall, Lambourne | Francis Rilstone | Botanical Society of The British Isles | 23/8/1948 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC1 West Cornwall, Perranzabuloe,Lambourne Hill | Francis Rilstone | Botanical Society of The British Isles Francis Rilstone | 23/8/1948 | K |
| Sium latifolium | GB, VC61 South-east Yorkshire, Withernsea | Robert Lewis | Botanical Society of The British Isles Robert Lewis | 4/9/1948 | K |
| Callitriche obtusangula | GB, VC35 Monmouthshire, Rumney | Arthur Edward Wade | Botanical Society of The British Isles National Museum of Wales | 20/6/1949 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC39 Staffordshire, Whitmore | Eric Smoothy Edees | Botanical Society of The British Isles Eric Smoothy Edees | 12/7/1949 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC70 Cumberland, Skirwith | Clara Winsome Muirhead | Botanical Society of The British Isles Carlisle Museum Herbarium | 27/8/1949 | K |
+ | Tordylium maximum | GB, VC18 South Essex, Tilbury | John Norton Mills | Botanical Society of The British Isles John Norton Mills | 1950 | MANCH |
+ | Tordylium maximum | GB, VC18 South Essex, Tilbury | John Norton Mills | Botanical Society of The British Isles John Norton Mills | 1950 | MANCH |
+ | Tordylium maximum | GB, VC18 South Essex, Tilbury | John Norton Mills | Botanical Society of The British Isles John Norton Mills | 1950 | MANCH |
| Mentha spicata x longifolia = M. x villosonervata | GB, VC28 West Norfolk, Leziate Heath | | Botanical Society of The British Isles Eric Lister Swann | 1/8/1950 | K |
| Mentha aquatica x spicata = M. x piperita | GB, VC28 West Norfolk, Roydon Common | Eric Lister Swann | Botanical Society of The British Isles Eric Lister Swann | 29/8/1950 | OXF |
| Mentha x piperita var. vulgaris | GB, VC28 West Norfolk, Roydon Common | | Botanical Society of The British Isles Eric Lister Swann | 29/8/1950 | K |
| Mentha x piperita | GB, VC28 West Norfolk, Dersingham | Eric Lister Swann | Botanical Society of The British Isles | 31/8/1950 | K |
| Phalaris arundinacea | GB, VC41 Glamorganshire, Cardiff | Ruth Davies | Botanical Society of The British Isles National Museum of Wales | 6/1951 | K |
| Ceterach officinarum | GB, VC34 West Gloucestershire, Staunton | Botanical Society of The British Isles | Douglas Montague Heath | 16/6/1951 | BIRM |
| Eleocharis uniglumis | GB, VC96 East Inverness-shire, Nairn | Ursula Katherine Duncan | Botanical Society of The British Isles Ursula Katherine Duncan | 18/6/1951 | SLBI |