| Carex vulpina | GB, VC16 West Kent, Tonbridge, River Medway | Arthur Langford Still Edward Charles Wallace | Arthur Langford Still Patrick Martin Hall | 24/6/1939 | BM |
| Mentha aquatica x spicata = M. x piperita | GB, VC2 East Cornwall, Boscastle | Arthur Langford Still | Job Edward Lousley | 1/8/1940 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Chiddingfold | Arthur Langford Still | Job Edward Lousley | 5/9/1937 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC36 Herefordshire, Ledbury | Francis Morland Day | Arthur Langford Still | 29/8/1940 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Wallington Cultivated GB, VC37 Worcestershire, Alfrick | Arthur Langford Still | Job Edward Lousley | 9/1940 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Symonds Yat | Arthur Langford Still | Job Edward Lousley | 10/8/1940 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Symonds Yat | Arthur Langford Still | | 10/8/1940 | CGE |
| Carex dioica | GB, VC49 Caernarvonshire, Cwm Idwal | Arthur Langford Still | Robert MacKechnie | 25/6/1936 | E |
| Carex disticha | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 29/6/1936 | E |
| Carex elongata | GB, VC16 West Kent, Tonbridge | Arthur Langford Still | Robert MacKechnie | 20/5/1940 | E |
| Carex lasiocarpa | GB, VC6 North Somerset, Ashcott, Peat Moor | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 11/6/1934 | E |
| Carex lasiocarpa | GB, VC11 South Hampshire, Holmsley Bog | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 8/6/1933 | E |
| Carex lasiocarpa | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | Robert MacKechnie | 14/6/1937 | E |
| Carex rostrata | GB, VC12 North Hampshire, Waggoners Wells | Arthur Langford Still | Edward Charles Wallace | 7/7/1935 | E |
| Carex strigosa | GB, VC24 Buckinghamshire, Penn | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 25/5/1933 | E |
| Carex vesicaria | GB, VC49 Caernarvonshire, Llyn Padarn | Arthur Langford Still | Edward Charles Wallace | 9/6/1936 | E |
| Damasonium alisma | GB, VC17 Surrey, Worplesdon | Arthur Langford Still | | 7/7/1939 | E |
| Mentha aquatica | GB, VC17 Surrey, Wallington Cultivated GB, VC2 East Cornwall, Boscastle | Arthur Langford Still | Job Edward Lousley | 1/8/1940 | K |
| Mentha aquatica | GB, VC17 Surrey, Holmwood Common | Arthur Langford Still | | 3/9/1935 | K |
| Mentha aquatica | GB, VC17 Surrey, Wallington Cultivated GB, VC20 Hertfordshire, Roydon | Arthur Langford Still | Botanical Exchange Club of The British Isles | 6/9/1936 | K |
| Mentha aquatica var. weiheana | GB, VC17 Surrey, Woking | Arthur Langford Still Edward Charles Wallace | Edward Charles Wallace | 6/9/1935 | K |
| Mentha aquatica | GB, VC20 Hertfordshire, Royston | Arthur Langford Still | Arthur Langford Still | 29/9/1935 | K |
| Mentha aquatica x spicata = M. x piperita var. crispa | GB, VC17 Surrey, Wallington Cultivated GB, VC70 Cumberland, Carlisle | Arthur Langford Still | Botanical Exchange Club of The British Isles | 10/8/1937 | K |
| Mentha arvensis | GB, VC3 South Devon, Buckfastleigh | Arthur Langford Still | | 20/7/1935 | K |
| Mentha arvensis | GB, VC17 Surrey, Leatherhead | Arthur Langford Still | Job Edward Lousley | 2/8/1935 | K |
| Mentha arvensis | GB, VC37 Worcestershire, Cotheridge | | Arthur Langford Still Job Edward Lousley | 12/9/1940 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC21 Middlesex, Stanmore | Arthur Langford Still | | 26/8/1930 to 26/8/1939 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC21 Middlesex, Stanmore | Arthur Langford Still | Botanical Exchange Club of The British Isles | 18/9/1936 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC21 Middlesex, Stanmore | Arthur Langford Still | | 18/9/1936 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Bishopston | Esther J Bowen | Arthur Langford Still | 23/9/1934 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Parkmill | Arthur Langford Still | Botanical Exchange Club of The British Isles | 1/9/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Wallington | Arthur Langford Still | Job Edward Lousley | 10/8/1940 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC17 Surrey, Wallington Cultivated GB, VC34 West Gloucestershire, Symonds Yat | Arthur Langford Still | Botanical Exchange Club of The British Isles | 8/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Symonds Yat | Arthur Langford Still | | 27/8/1936 | K |
| Mentha gentilis var. gracilis | GB, VC17 Surrey, Wallington Cultivated | Arthur Langford Still | Botanical Society & Exchange Club of The British Isles Arthur Langford Still | 8/1936 | K |
| Mentha gentilis var. vesana | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Botanical Exchange Club of The British Isles | 3/9/1937 | K |
| Mentha piperita var. piperita | GB, VC17 Surrey, Chiddingfold | Arthur Langford Still | Job Edward Lousley | 15/9/1937 | K |
| Mentha piperita var. piperita | GB, VC33 East Gloucestershire, Fossebridge | Arthur Langford Still | Arthur Langford Still Job Edward Lousley | 23/8/1937 | K |
| Mentha spicata | GB, VC1 West Cornwall, Poldhu Cove GB, VC17 Surrey, Wallington Cultivated | Arthur Langford Still | Job Edward Lousley | 10/8/1940 | K |
| Mentha spicata | GB, VC16 West Kent, Farningham | Arthur Langford Still | Arthur Langford Still | 29/7/1934 | K |