| Agrimonia procera | GB, VC62 North-east Yorkshire, Pilmoor | Catherine Muriel Rob | | 12/7/1947 | SLBI |
| Alnus incana | GB, VC62 North-east Yorkshire, Kepwick | Catherine Muriel Rob | Catherine Muriel Rob | 13/7/1939 | SLBI |
| Arbutus alpina | GB, VC108 West Sutherland, Inchnadamph | Catherine Muriel Rob | Isaac A Helsby | 7/1931 | SLBI |
+ | Bromus interruptus | GB, VC17 Surrey, Headley | Cecil Victor Boley Marquand Charles Edward Hubbard H K Shaw | Royal Botanical Gardens, Kew Catherine Muriel Rob | 16/6/1932 | MANCH |
| Callitriche | GB, VC69 Westmorland, Esthwaite Water | Catherine Muriel Rob Douglas Montague Heath | Douglas Montague Heath | 6/9/1936 | BIRM |
| Carex disticha | GB, VC62 North-east Yorkshire, Terrington Carr | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 29/7/1937 | BM |
| Carex divulsa | GB, VC65 North-west Yorkshire, Coverham | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 4/7/1945 | BM |
| Carex divulsa subsp. leersii | GB, VC65 North-west Yorkshire, Coverham | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 4/7/1945 | BM |
| Carex elata | GB, VC62 North-east Yorkshire, Pilmoor | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Catherine Muriel Rob Job Edward Lousley | 17/5/1938 | SLBI |
| Carex leporina | GB, VC64 Mid-west Yorkshire, Thurston | Catherine Muriel Rob | Catherine Muriel Rob | 10/7/1937 | BM |
| Carex muricata subsp. pairae | GB, VC62 North-east Yorkshire, Catton | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 1/7/1945 | SLBI |
| Carex muricata subsp. pairae | GB, VC62 North-east Yorkshire, Catton | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 1/7/1945 | BM |
| Carex muricata subsp. pairae | GB, VC62 North-east Yorkshire, Catton | Catherine Muriel Rob | Catherine Muriel Rob | 1/7/1945 | SLBI |
| Carex muricata subsp. pairae | GB, VC65 North-west Yorkshire, Coverham | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 4/7/1945 | SLBI |
| Crepis biennis | GB, VC62 North-east Yorkshire, Topcliffe | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Catherine Muriel Rob | 22/6/1938 | SLBI |
| Crepis biennis | GB, North Yorkshire, Topcliffe | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Job Edward Lousley | 22/6/1938 | SLBI |
| Cuscuta campestris | GB, VC65 North-west Yorkshire, Brafferton | Catherine Muriel Rob | Botanical Exchange Club of The British Isles | 29/9/1935 | SLBI |
| Euphrasia nemorosa | GB, VC62 North-east Yorkshire, Knayton | Catherine Muriel Rob | Catherine Muriel Rob | 2/8/1946 | SLBI |
| Euphrasia nemorosa | GB, VC62 North-east Yorkshire, Knayton | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob Eric Lister Swann | 2/8/1946 | BR |
+ | Hordeum marinum | GB, Hampshire, Hampshire | D G Goddard | Catherine Muriel Rob | 20/7/1934 | MANCH |
+ | Hordeum marinum | GB, VC28 West Norfolk, Heacham Marsh | Charles Edward Hubbard | Catherine Muriel Rob | 18/7/1936 | MANCH |
| Hydrilla lithuanica | GB, VC69 Westmorland, Esthwaite Water | Catherine Muriel Rob Douglas Montague Heath Gertrude Foggitt | Douglas Montague Heath | 8/9/1936 | BIRM |
+ | Koeleria vallesiana | GB, VC6 North Somerset, Brean Down | Charles Edward Hubbard Francis Ballard | Catherine Muriel Rob | 25/6/1934 | MANCH |
+ | Linnaea borealis | GB, VC90 Angus, Base of Craig Marsh, Clova | Catherine Muriel Rob T G Foggitt | | 7/1901 | LIV |
+ | Lycopodiella inundata | GB, VC11 South Hampshire, Lyndhurst,??Skymers Minor | D | Catherine Muriel Rob | 18/8/1937 | MANCH |
| Malva parviflora | GB, VC65 North-west Yorkshire, Tanfield Mill | Catherine Muriel Rob | Isaac A Helsby | 9/1933 | SLBI |
| Malva verticillata | GB, VC64,VC65, Tanfield | Catherine Muriel Rob | Isaac A Helsby | 9/1933 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC37 Worcestershire, Alfrick | Thomas Jackson Foggitt | Catherine Muriel Rob Joseph Norman Frankland | 11/9/1926 | LIV |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC66 County Durham, Teesdale | Catherine Muriel Rob | Catherine Muriel Rob | 14/4/1946 | MANCH |
| Mentha arvensis | GB, VC64 Mid-west Yorkshire, Cawood | Catherine Muriel Rob | Catherine Muriel Rob | 28/7/1947 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC66 County Durham, Wynch Bridge | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Catherine Muriel Rob | 3/9/1938 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC66 County Durham, Wynch Bridge | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Catherine Muriel Rob | 3/9/1938 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Gilly Tresamble | Catherine Muriel Rob Thomas Jackson Foggitt | Joseph Norman Frankland | 17/9/1926 | LIV |
| Mentha arvensis x spicata = M. x gracilis | GB, VC64 Mid-west Yorkshire, Nunwick | Catherine Muriel Rob | Botanical Society & Exchange Club of The British Isles Catherine Muriel Rob | 11/9/1947 | K |
| 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 |
| Mentha arvensis x spicata = M. x gracilis | GB, VC66 County Durham, Wynch Bridge | Catherine Muriel Rob | Botanical Exchange Club of The British Isles Catherine Muriel Rob | 3/9/1938 | SLBI |
| Mentha longifolia | GB, VC17 Surrey, Bullswater Common | Catherine Muriel Rob Joanna Charlotte Davy | Botanical Exchange Club of The British Isles Catherine Muriel Rob | 28/7/1938 | SLBI |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC28 West Norfolk, Harling Road | Catherine Muriel Rob Thomas Jackson Foggitt | Joseph Norman Frankland | 14/9/1926 | LIV |