| Misopates orontium | GB, VC12 North Hampshire, Oak Hangar | | Isaac A Helsby Joseph Edward Little | 6/8/1931 | SLBI |
| Verbascum thapsus x nigrum = V. x semialbum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club J Fraser | 28/7/1931 | K |
| Verbascum thapsus x nigrum = V. x semialbum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 28/7/1931 | BIRM |
| Verbascum thapsus x nigrum = V. x semialbum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Harold Stuart Thompson Joseph Edward Little | 11/7/1931 | BIRM |
| Verbascum lychnitis | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club Job Edward Lousley | 8/7/1931 | SLBI |
| Mentha aquatica | GB, VC17 Surrey, Guildford | | Isaac A Helsby Joseph Edward Little | 7/7/1931 | SLBI |
| Verbascum thapsus x lychnitis = V. x thapsi | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club | 7/1931 | BIRM |
| Verbascum thapsus x lychnitis = V. x thapsi | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club J Fraser | 7/1931 | K |
| Viola tricolor subsp. saxatilis | GB, VC101 Kintyre, Killean | Enid M MacAlister Hall | Watson Botanical Exchange Club Job Edward Lousley Joseph Edward Little | 7/1931 | SLBI |
| Viola tricolor subsp. saxatilis | GB, VC101 Kintyre, Tayinloan | Enid M MacAlister Hall | Watson Botanical Exchange Club Harold Stuart Thompson Joseph Edward Little | 7/1931 | BIRM |
| Silene latifolia x dioica = S. x hampeana | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club | 15/6/1931 | SLBI |
| Silene latifolia x dioica = S. x hampeana | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club Job Edward Lousley | 15/6/1931 | SLBI |
| Silene latifolia x dioica = S. x hampeana | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 15/6/1931 | BIRM |
| Aceras anthropophorum | GB, VC20 Hertfordshire, Hitchin | K Mears | Joseph Edward Little | 5/6/1931 | K |
| Viola arvensis | GB, VC20 Hertfordshire, Saint Ippolyts | Joseph Edward Little | Harold Stuart Thompson | 22/5/1931 | BIRM |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Saint Ippolyts | Joseph Edward Little | Harold Stuart Thompson | 22/5/1931 | BIRM |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Harold Stuart Thompson | 18/5/1931 | BIRM |
| Viola tricolor subsp. tricolor | GB, VC20 Hertfordshire, Saint Ippolyts | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 18/5/1931 | BIRM |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Saint Ippolyts | Joseph Edward Little | Watson Botanical Exchange Club Job Edward Lousley | 18/5/1931 | SLBI |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Saint Ippolyts | Joseph Edward Little | Harold Stuart Thompson | 18/5/1931 | BIRM |
| Viola tricolor subsp. tricolor | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 15/5/1931 | BIRM |
| Viola ruralis | GB, VC20 Hertfordshire, Wymondley | Joseph Edward Little | Botanical Exchange Club of The British Isles Job Edward Lousley | 15/4/1931 | SLBI |
| Salix daphnoides | GB, VC20 Hertfordshire, Hitchin Cultivated | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson Joseph Edward Little | 25/3/1931 21/7/1931 | BIRM |
| Petroselinum segetum | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Job Edward Lousley Joseph Edward Little | 2/12/1930 | SLBI |
| Viola | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Botanical Exchange Club of The British Isles Job Edward Lousley | 11/11/1930 | SLBI |
| Viola | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Botanical Exchange Club of The British Isles Job Edward Lousley | 25/10/1930 | SLBI |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Botanical Exchange Club of The British Isles Job Edward Lousley | 11/10/1930 | SLBI |
| Petroselinum segetum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Job Edward Lousley Joseph Edward Little | 10/10/1930 | SLBI |
| Viola arvensis | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | | 10/10/1930 | BIRM |
| Viola arvensis | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | Isaac A Helsby | 10/10/1930 | SLBI |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Watson Botanical Exchange Club | 10/1930 11/1930 | SLBI |
| Viola tricolor x arvensis = V. x contempta | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 10/1930 to 11/1930 | BIRM |
| Verbascum speciosum | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | | 25/9/1930 | K |
| Veronica agrestis | GB, VC20 Hertfordshire, Hitchin | Joseph Edward Little | | 25/9/1930 | K |
| Verbascum speciosum | GB, VC20 Hertfordshire, U.D.C. Water Tower, Windmill Hill, Hitchin | Joseph Edward Little | | 25/9/1930 | K |
| Prunus domestica | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Watson Botanical Exchange Club | 20/9/1930 | SLBI |
| Prunus domestica subsp. insititia | GB, VC20 Hertfordshire, Great Wymondley | Joseph Edward Little | Job Edward Lousley | 20/9/1930 | SLBI |
| Viola arvensis | GB, VC20 Hertfordshire, Pirton | Joseph Edward Little | Watson Botanical Exchange Club Harold Stuart Thompson | 16/9/1930 | BIRM |
| Viola arvatica | GB, VC20 Hertfordshire, Pirton | Joseph Edward Little | Watson Botanical Exchange Club Job Edward Lousley | 15/9/1930 | SLBI |
| Arnoseris minima | GB, VC12 North Hampshire, Fleet Pond | Gerald Mortimer Ash Joseph Edward Little | Watson Botanical Exchange Club Joseph Edward Little | 11/9/1930 | SLBI |