| Ajuga genevensis | GB, Hampshire, New Forest | | British Museum (Natural History) | 30/5/1929 | SLBI |
| Carex muricata subsp. pairae | GB, VC30 Bedfordshire, Heath and Reach, King's Wood | Alfred James Wilmott | British Museum (Natural History) | | BM |
| Carex otrubae | GB, VC18 South Essex, Pitsea | Stanley Thomas Jermyn | British Museum (Natural History) | 22/8/1954 | BM |
| Carex paniculata | GB, VC95 Moray, Garmouth | Aleksandrs Melderis | British Museum (Natural History) | 3/7/1953 | BM |
| Dactylorhiza incarnata | GB, VC21 Middlesex, Yiewsley | Charles Baylis Green | British Museum (Natural History) Charles Baylis Green | 21/7/1910 | SLBI |
+ | Dryopteris carthusiana x dilatata = D. x deweveri | | | British Museum (Natural History) | | MANCH |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Mitcham | | British Museum (Natural History) C E Sage | 20/8/1924 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC27 East Norfolk, Whitwell | Kirby Trimmer | British Museum (Natural History) | 28/8/1883 | CGE |
| Nymphaea alba subsp. occidentalis | IE, VCH16 West Galway, Craiggamore | Alfred James Wilmott | British Museum (Natural History) | 23/6/1925 | SLBI |
+ | Potamogeton alpinus x crispus = P. x olivaceus | GB, VC78 Peeblesshire, Manor | George Taylor | British Museum (Natural History) | 29/7/1946 | MANCH |
| Potamogeton berchtoldii | GB, VC60 West Lancashire, Preston | James Edgar Dandy | British Museum (Natural History) | 3/9/1946 | MANCH |
+ | Potamogeton berchtoldii x acutifolius = P. x sudermanicus | GB, VC9 Dorset, Arne | George Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 17/8/1946 | MANCH |
+ | Potamogeton compressus | GB, VC58 Cheshire, Chester | George Taylor | British Museum (Natural History) | 5/9/1947 | MANCH |
+ | Potamogeton compressus | GB, VC59 South Lancashire, Ashton-under-Lyne,Daisy Nook | George Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 26/8/1945 | MANCH |
+ | Potamogeton compressus | GB, VC59 South Lancashire, Manchester,Droylsden | George Taylor | British Museum (Natural History) | 26/8/1945 | MANCH |
| Potamogeton filiformis x pectinatus = P. x suecicus | GB, VC64 Mid-west Yorkshire, Leathley | George Taylor | British Museum (Natural History) | 17/8/1940 | MANCH |
+ | Potamogeton friesii | GB, VC56 Nottinghamshire, Wiseton,Drakeholes | J Brown | British Museum (Natural History) | 7/7/1948 | MANCH |
+ | Potamogeton friesii x crispus = P. x lintonii | GB, VC59 South Lancashire, Manchester,Gorton | George Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 26/8/1945 | MANCH |
| Potamogeton gramineus | GB, VC52 Anglesey, Pentraeth | Charles Bailey | British Museum (Natural History) Charles Bailey | 3/10/1884 | E |
+ | Potamogeton gramineus x alpinus = P. x nericius | GB, VC92 South Aberdeenshire, Alford | George Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 1946 | MANCH |
| Potamogeton lucens | GB, VC29 Cambridgeshire, Mepal | Alfred Fryer | British Museum (Natural History) Alfred Fryer Charles Bailey | 2/9/1897 | MANCH |
+ | Potamogeton lucens x gramineus = P. x angustifolius | GB, VC54 North Lincolnshire, Wroot | George Taylor | British Museum (Natural History) | 5/8/1943 | MANCH |
| Potamogeton natans | GB, VC75 Ayrshire, New Cumnock | George Taylor | British Museum (Natural History) | 5/8/1949 | E |
| Potamogeton natans | GB, VC75 Ayrshire, Trabboch | George Taylor | British Museum (Natural History) | 3/9/1947 | E |
+ | Potamogeton natans x gramineus = P. x sparganiifolius | GB, VC75 Ayrshire, Strainton,Burnfoot | George Taylor | British Museum (Natural History) | 4/9/1947 | MANCH |
+ | Potamogeton natans x lucens = P. x fluitans | GB, VC11 South Hampshire, Saint Leonards | George Taylor | British Museum (Natural History) The British Museum | 17/8/1946 | MANCH |
+ | Potamogeton nodosus | GB, VC7 North Wiltshire, Holt,River Avon | George Taylor | British Museum (Natural History) The British Museum | 28/8/1940 | MANCH |
+ | Potamogeton nodosus | GB, VC34 West Gloucestershire, Bitton,River Avon below Flock Mill | George Taylor | British Museum (Natural History) The British Museum | 27/9/1949 | MANCH |
| Potamogeton pectinatus | GB, VC62 North-east Yorkshire, Aldlwark Bridge | George Taylor | British Museum (Natural History) | 11/6/1941 | MANCH |
| Potamogeton polygonifolius | GB, VC75 Ayrshire, Dalmellington | George Taylor | British Museum (Natural History) George Taylor | 4/8/1949 | E |
+ | Potamogeton praelongus | GB, VC23 Oxfordshire, Blenheim Park | James Edgar Dandy | British Museum (Natural History) The British Museum | 12/8/1949 | MANCH |
+ | Potamogeton praelongus | GB, VC58 Cheshire, Quoisley | George Taylor | British Museum (Natural History) The British Museum | 5/9/1947 | MANCH |
+ | Potamogeton praelongus x perfoliatus = P. x cognatus | GB, VC54 North Lincolnshire, Belton | John Martin Taylor | British Museum (Natural History) Flora of Leicestershire (1886) | 3/7/1944 | MANCH |
+ | Potamogeton praelongus x perfoliatus = P. x cognatus | GB, VC54 North Lincolnshire, Belton | John Martin Taylor | British Museum (Natural History) The British Museum | 22/12/1943 | MANCH |
| Potamogeton trichoides | GB, VC59 South Lancashire, Ashton Canal | George Taylor | British Museum (Natural History) | 26/8/1945 | MANCH |
| Potamogeton trichoides | GB, VC63 South-west Yorkshire, Dewsbury | George Taylor | British Museum (Natural History) | 21/7/1940 | SLBI |