| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC29 Cambridgeshire, Bourn | Albert John Crosfield | Watson Botanical Exchange Club Arthur Bennett Charles Edgar Salmon | 30/9/1916 | CGE |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC29 Cambridgeshire, Linton | Albert John Crosfield | | 12/7/1917 | CGE |
| Asplenium septentrionale | GB, VC49 Caernarvonshire, Llanrwst | John Edwards Griffith | Watson Botanical Exchange Club Albert John Crosfield | 8/1917 | BIRM |
| Securigera varia | GB, VC29 Cambridgeshire, Newmarket,Newmarket Heath | Albert John Crosfield | | 15/8/1917 | BIRM |
| Primula elatior x veris = P. x media | GB, VC29 Cambridgeshire, Hardwick Wood | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield | 23/4/1918 | SLBI |
| Daucus carota | GB, VC29 Cambridgeshire, Hardwick | Albert John Crosfield | Watson Botanical Exchange Club | 24/7/1918 | SLBI |
| Securigera varia | GB, VC29 Cambridgeshire, Newmarket,Newmarket Heath | Albert John Crosfield | Albert John Crosfield | 6/8/1918 | BIRM |
| Primula vulgaris x elatior = P. x digenea | GB, VC29 Cambridgeshire, Hardwick Wood | Albert John Crosfield | Watson Botanical Exchange Club Harold Stuart Thompson | 8/5/1919 | BIRM |
+ | Primula elatior | GB, VC29 Cambridgeshire, Hardwick Wood | Albert John Crosfield | Bailey Frederick Ernest Weiss Albert John Crosfield | 8/5/1919 | MANCH |
| Carex remota | GB, VC24 Buckinghamshire, Penn | Albert John Crosfield | Albert John Crosfield | 5/7/1919 | BM |
| Limonium vulgare | GB, VC28 West Norfolk, Wells-on-Sea | Albert John Crosfield | Watson Botanical Exchange Club Harold Stuart Thompson | 6/8/1919 | BIRM |
| Polygala vulgaris subsp. collina | GB, VC28 West Norfolk, Wells-on-Sea | Albert John Crosfield | Albert John Crosfield | 13/7/1920 | BIRM |
| Hypericum androsaemum | GB, VC34 West Gloucestershire, Bristol Cultivated | James Walter White | Watson Botanical Exchange Club Albert John Crosfield | 8/1920 | BIRM |
| Stellaria neglecta | GB, VC13 West Sussex, Selham | Rowland John Burdon | Watson Botanical Exchange Club Albert John Crosfield | 13/5/1922 | BIRM |
| Galium parisiense var. anglicum | GB, VC6 North Somerset, Cheddar Gorge | Harold Stuart Thompson | Watson Botanical Exchange Club Albert John Crosfield Harold Stuart Thompson | 15/6/1922 | BIRM |
| Stellaria neglecta | GB, VC5 South Somerset, Porlock | Leslie Beeching Hall | Watson Botanical Exchange Club Albert John Crosfield | 25/6/1922 | BIRM |
| Euphorbia waldsteinii | GB, VC29 Cambridgeshire, Dernford Fen | Albert John Crosfield | | 27/6/1922 | BIRM |
| Cakile maritima | GB, VC28 West Norfolk, Hunstanton | Albert John Crosfield | Albert John Crosfield | 14/7/1922 | BIRM |
| Bupleurum tenuissimum | GB, VC34 West Gloucestershire, Durdham Down | Harold Stuart Thompson | Watson Botanical Exchange Club Albert John Crosfield Harold Stuart Thompson | 20/8/1922 | BIRM |
| Agrimonia procera | GB, VC24 Buckinghamshire, Beaconsfield | Albert John Crosfield | Albert John Crosfield | 24/10/1922 | BIRM |
| Acer campestre var. leiocarpum | GB, VC20 Hertfordshire, Watford | Joseph Edward Little | Watson Botanical Exchange Club Albert John Crosfield Joseph Edward Little | 7/12/1922 | BIRM |
| Centaurea debeauxii subsp. nemoralis | GB, VC29 Cambridgeshire, Linton | Albert John Crosfield | Watson Botanical Exchange Club | 10/8/1923 | SLBI |
| Platanus orientalis | GB, VC29 Cambridgeshire, Cambridge | Albert John Crosfield | Joseph Edward Little | 15/9/1923 | SLBI |
| Avena sterilis subsp. ludoviciana | GB, VC29 Cambridgeshire, Cambridge | Albert John Crosfield | Watson Botanical Exchange Club Harold Stuart Thompson | 17/9/1923 | BIRM |
| Mentha longifolia | GB, VC29 Cambridgeshire, Linton | Albert John Crosfield | Watson Botanical Exchange Club | 18/9/1923 | SLBI |
| Mentha spicata x longifolia = M. x villosonervata | GB, VC29 Cambridgeshire, Linton | Albert John Crosfield | | 18/9/1923 | CGE |
| Mentha longifolia | GB, VC29 Cambridgeshire, Linton | Albert John Crosfield | Watson Botanical Exchange Club Harold Stuart Thompson Albert John Crosfield | 18/9/1923 | BIRM |
| Mentha longifolia | GB, VC29 Cambridgeshire, Linton | Harold Stuart Thompson | Albert John Crosfield Isaac A Helsby | 18/9/1923 | SLBI |
| Aethusa cynapium subsp. agrestis | GB, VC29 Cambridgeshire, Dernford Farm | Albert John Crosfield | Watson Botanical Exchange Club | 19/9/1923 | SLBI |
| Aethusa cynapium | GB, VC29 Cambridgeshire, Great Shelford | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield Harold Stuart Thompson | 19/9/1923 | BIRM |
| Ranunculus aquatilis | GB, VC17 Surrey, Mitcham Common | David Guthrie Catcheside | Watson Botanical Exchange Club Albert John Crosfield David Guthrie Catcheside | 10/5/1924 | BIRM |
| Phleum phleoides | GB, VC29 Cambridgeshire, Hildersham | Albert John Crosfield | Harold Stuart Thompson | 5/6/1924 | BIRM |
| Carex divulsa x remota = C. x emmae | GB, VC14 East Sussex, Waldron | Charles Edgar Salmon | Albert John Crosfield Charles Edgar Salmon | 11/6/1924 | BM |
| Saxifraga umbrosa | GB, VC17 Surrey, Wimbledon Cultivated | Herbert William Pugsley | Watson Botanical Exchange Club Albert John Crosfield Herbert William Pugsley | 15/6/1924 | BIRM |
| Tilia platyphyllos | GB, VC34 West Gloucestershire, Stoke Bishop Cultivated | James Walter White | Watson Botanical Exchange Club Albert John Crosfield | 9/7/1924 to 6/9/1924 | BIRM |
| Suaeda fruticosa | GB, VC28 West Norfolk, Wells | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield | 19/7/1924 | SLBI |
| Cirsium arvense | GB, VC29 Cambridgeshire, Cambridge | Albert John Crosfield | Watson Botanical Exchange Club | 29/7/1924 | SLBI |
| Tilia platyphyllos | GB, VC37 Worcestershire, Malvern | Albert John Crosfield | Albert John Crosfield Watson Botanical Exchange Club | 7/1925 | SLBI |
| Seseli libanotis | GB, VC29 Cambridgeshire, Cherry Hinton | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield | 8/7/1925 | SLBI |
| Seseli libanotis | GB, VC29 Cambridgeshire, Cherry Hinton | Albert John Crosfield | Watson Botanical Exchange Club Isaac A Helsby | 11/8/1925 | SLBI |
| Pulmonaria longifolia | GB, VC11 South Hampshire, Hinton Admiral | Albert John Crosfield | Albert John Crosfield | 10/3/1926 | BIRM |
| Lavatera arborea | GB, VC3 South Devon, Thurlestone | Albert John Crosfield | Watson Botanical Exchange Club Job Edward Lousley Albert John Crosfield | 18/8/1927 | SLBI |
| Silene integripetala | GB, VC29 Cambridgeshire, Cambridge | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield | 11/1928 | SLBI |
| Erysimum | GB, VC29 Cambridgeshire, Cambridge | Albert John Crosfield | Watson Botanical Exchange Club Albert John Crosfield | 10/1930 | SLBI |