| Chenopodium rubrum | GB, VC17 Surrey, Nutfield | Arthur Langford Still | | 15/9/1933 | SLBI |
| Carex divisa | GB, VC17 Surrey, Richmond Park | Arthur Langford Still | Arthur Langford Still | 13/6/1938 | SLBI |
| Mentha gracilis var. cardiaca | GB, VC17 Surrey, Shalford | Arthur Langford Still | | 2/9/1933 | SLBI |
| Mentha aquatica | GB, VC17 Surrey, Wallington Cultivated | Arthur Langford Still | | 21/5/1935 | SLBI |
| 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 | GB, VC17 Surrey, Wallington Cultivated | Arthur Langford Still | Botanical Exchange Club of The British Isles | 6/9/1936 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC17 Surrey, Wallington Cultivated GB, VC6 North Somerset, Weston in Gordano | Arthur Langford Still | | 8/1937 | OXF |
| Mentha spicata x longifolia = M. x villosonervata | GB, VC17 Surrey, Wallington | Arthur Langford Still | Arthur Langford Still | 9/1935 | K |
| Damasonium alisma | GB, VC17 Surrey, Worplesdon | Arthur Langford Still | | 7/7/1939 | E |
| Trifolium ochroleucon | GB, VC19 North Essex, Cressing | Arthur Langford Still | | 12/7/1935 | SLBI |
| Mentha aquatica | GB, VC20 Hertfordshire, Royston | Arthur Langford Still | Arthur Langford Still | 29/9/1935 | 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, VC21 Middlesex, Stanmore | Arthur Langford Still | Botanical Exchange Club of The British Isles | 18/9/1936 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC24 Buckinghamshire, Iver | Arthur Langford Still | | 21/9/1935 | SLBI |
| Carex disticha | GB, VC27 East Norfolk, Holt Lowes | Arthur Langford Still | | 6/1932 | BM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC34 West Gloucestershire, Symonds Yat | Arthur Langford Still | | 10/8/1940 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Symonds Yat | Arthur Langford Still | | 27/8/1936 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC36 Herefordshire, Symonds Yat | Arthur Langford Still | | 27/8/1936 | SLBI |
| Mentha spicata | GB, VC36 Herefordshire, Wellington Cultivated | Arthur Langford Still | Arthur Langford Still | 29/7/1935 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Bishopston | Esther J Bowen | Arthur Langford Still | 23/9/1934 | K |
| Mentha gentilis var. vesana | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Botanical Exchange Club of The British Isles | 3/9/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Gower Cultivated | Arthur Langford Still | | 10/8/1939 | SLBI |
| Cirsium tuberosum | GB, VC41 Glamorganshire, Nash | Arthur Langford Still | | 25/6/1935 | SLBI |
| 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 |
| Chenopodium murale | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Arthur Langford Still | 26/6/1935 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC46 Cardiganshire, Aberarth Cultivated | Arthur Langford Still | | 6/8/1939 | SLBI |
| Carex dioica | GB, VC49 Caernarvonshire, Cwm Idwal | Arthur Langford Still | Robert MacKechnie | 25/6/1936 | E |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, Bodorgan Station | Arthur Langford Still | Arthur Langford Still | 29/6/1936 | BM |
| Trifolium striatum | GB, VC52 Anglesey, Porth Dafarch | Arthur Langford Still | Flora Britannica | 7/6/1937 | SLBI |
| Carex lasiocarpa | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | | 14/6/1937 | BM |
| Carex lasiocarpa | GB, VC52 Anglesey, Rhoscolyn | Arthur Langford Still | Robert MacKechnie | 14/6/1937 | E |
| Atriplex | GB, VC52 Anglesey, Rhosneigr | Arthur Langford Still | | 24/6/1937 | SLBI |
| Carex muricata subsp. pairae | GB, VC52 Anglesey, South Stack | Arthur Langford Still | Arthur Langford Still | 6/1937 | BM |
| 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 aquatica x spicata = M. x piperita | GB, VC90 Angus, Brechin,Fern Den | Arthur Langford Still | | | SLBI |
| Mentha longifolia | GB, VC90 Angus, Glamis | Arthur Langford Still | | 19/8/1937 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC20 Hertfordshire, Harpenden Cultivated | Harry Joseph Riddelsdell | Arthur Langford Still Harry Joseph Riddelsdell | 8/1938 | OXF |
| Fumaria bastardii var. hibernica | GB, VC1 West Cornwall, Mullion Cove | Arthur Langford Still | | 12/6/1938 | SLBI |
| Fumaria bastardii | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace | 16/8/1934 | SLBI |