| Phalaris arundinacea | GB, VC41 Glamorganshire, Cardiff | Ruth Davies | Botanical Society of The British Isles National Museum of Wales | 6/1951 | K |
| Scutellaria minor | GB, VC17 Surrey, Epsom Common | Charles Edward Britton | Botanical Society of The British Isles Edward Charles Wallace | 1/9/1928 | K |
| Sium latifolium | GB, VC61 South-east Yorkshire, Withernsea | Robert Lewis | Botanical Society of The British Isles Robert Lewis | 4/9/1948 | K |
| Stachys | GB, VC1 West Cornwall, Lambourne | Francis Rilstone | Botanical Society of The British Isles | 23/8/1948 | K |
| Stachys | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 20/7/1904 | 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 |
| 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 |
| Thymus praecox subsp. arcticus | GB, Suffolk, Eriswell | Christopher Donald Pigott | Botanical Society of The British Isles Cambridge University | 7/1951 | K |
| Atriplex prostrata x longipes = A. x gustafssoniana | GB, VC34 West Gloucestershire, Bristol | Angela Roberts | Botanical Society of The British Isles | 28/5/1979 | MANCH |
+ | Cuscuta epithymum | GB, VC13 West Sussex, Midhurst,Woolbeding | David Paul Earl Heinrick E Weber | Botanical Society of The British Isles David Paul Earl | 7/2001 | 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 |
+ | 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 |
+ | Otanthus maritimus | IE, VCH12 Co. Wexford, Rosslare | John Norton Mills | Botanical Society of The British Isles John Norton Mills | 31/8/1953 | MANCH |
+ | Otanthus maritimus | IE, VCH12 Co. Wexford, Rosslare | John Norton Mills | Botanical Society of The British Isles | 31/8/1953 | MANCH |
+ | Otanthus maritimus | IE, VCH12 Co. Wexford, Rosslare | John Norton Mills | Botanical Society of The British Isles John Norton Mills | 31/8/1953 | MANCH |
| 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 |
+ | 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 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 arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Sanderstead | | Botanical Society of The British Isles Donald Peter Young | 14/8/1951 | OXF |
| 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 |
| Alchemilla alpina | GB, VC66 County Durham, Bishop Auckland | Stuart Max Walters | Botanical Society of The British Isles Cambridge University | 25/5/1952 | SLBI |
| Amsinckia | GB, VC8 South Wiltshire, Little Cheverell | | Botanical Society of The British Isles Joseph Donald Grose | 6/10/1954 | SLBI |
| Aphanes arvensis | GB, VC3 South Devon, East Allington | Stuart Max Walters | Botanical Society of The British Isles Cambridge University | 25/6/1951 | SLBI |
| 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 |
| Eleocharis uniglumis | GB, VC96 East Inverness-shire, Nairn | Ursula Katherine Duncan | Botanical Society of The British Isles Ursula Katherine Duncan | 18/6/1951 | 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 |
| Fumaria boraei | GB, VC57 Derbyshire, Dore | Frank Wilfred Adams | Botanical Society of The British Isles Frank Wilfred Adams | 30/9/1952 | SLBI |
| Galeopsis angustifolia | GB, VC41 Glamorganshire, West Aberthaw | Arthur Edward Wade | Botanical Society of The British Isles National Museum of Wales | 11/8/1953 | SLBI |
| Galinsoga quadriradiata | GB, VC29 Cambridgeshire, Cambridge Botanic Gardens | Stuart Max Walters | Botanical Society of The British Isles Cambridge University | 30/10/1953 | SLBI |
| Hirschfeldia incana | GB, VC18 South Essex, Barking | Job Edward Lousley | Botanical Society of The British Isles Job Edward Lousley | 17/10/1953 | SLBI |
| Lepidium | GB, VC15 East Kent, Hothfield | Job Edward Lousley | Botanical Society of The British Isles | 4/5/1952 | SLBI |
| Luzula forsteri | GB, VC14 East Sussex, Ashurst Wood | Christopher Robert Billups | Botanical Society of The British Isles Christopher Robert Billups | 26/4/1906 | SLBI |
| 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 longifolia | GB, VC13 West Sussex, Amberley | Edward Charles Wallace | Botanical Society of The British Isles | 8/8/1953 | SLBI |
| Orchis mascula | GB, VC14 East Sussex, Ashurst Wood | Florence Potter | Botanical Society of The British Isles Christopher Robert Billups | 15/5/1907 | SLBI |
| Rosa stylosa x canina = R. x andegavensis | GB, VC23 Oxfordshire, Bampton | Percival George Beak | Botanical Society of The British Isles | 8/1934 | SLBI |
| Senecio inaequidens | GB, VC30 Bedfordshire, Biggleswade Cultivated | Job Edward Lousley | Botanical Society of The British Isles | 13/7/1952 | SLBI |
| Sisymbrium orientale | GB, VC55 Leicestershire, Aylestone | Edward Kidston Horwood | Botanical Society of The British Isles | 12/8/1954 | SLBI |
| Sisymbrium pannonicum | GB, VC55 Leicestershire, Aylestone | Edward Kidston Horwood | Botanical Society of The British Isles | 4/8/1954 | SLBI |