| 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 |
| Potamogeton alpinus | GB, VC11 South Hampshire, Basingstoke Canal | Arthur Langford Still | | 6/1937 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Buckfastleigh | Arthur Langford Still | Harold Stuart Thompson | 20/8/1935 | BIRM |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Meavy | William Booth Waterfall | Arthur Langford Still Harold Stuart Thompson | 7/1878 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC5 South Somerset, Dulverton | Arthur Langford Still | Harold Stuart Thompson | 27/8/1935 | BIRM |
| Pimpinella major | GB, VC6 North Somerset, Blackford | Arthur Langford Still | Harold Stuart Thompson | 8/1935 | BIRM |
| Trigonella ornithopodioides | GB, VC6 North Somerset, Brean Down | Arthur Langford Still | Harold Stuart Thompson | 6/6/1934 | BIRM |
| Mentha rubra | GB, VC6 North Somerset, Chewton Mendip | Harold Stuart Thompson | Harold Stuart Thompson Rex Alan Henry Graham Arthur Langford Still | 12/8/1935 to 22/8/1935 | BIRM |
| Carex divisa | GB, VC6 North Somerset, Clifton | Arthur Langford Still Harold Stuart Thompson | Harold Stuart Thompson | 2/6/1934 | BIRM |
| Mentha spicata | GB, VC6 North Somerset, Clifton Bridge | Harold Stuart Thompson | Arthur Langford Still Harold Stuart Thompson | 3/9/1933 | BIRM |
| Mentha rubra | GB, VC6 North Somerset, Litton Upper Reservoir | Harold Stuart Thompson | Arthur Langford Still Harold Stuart Thompson | 12/8/1935 | BIRM |
| Carex filiformis | GB, VC6 North Somerset, Sharpham Moor | Arthur Langford Still Harold Stuart Thompson | Harold Stuart Thompson | 11/6/1934 | BIRM |
| Ranunculus aquatilis | GB, VC12 North Hampshire, Basingstoke Canal at Odiham | Arthur Langford Still | Watson Botanical Exchange Club Edward Charles Wallace Harold Stuart Thompson | 20/5/1933 | BIRM |
| Hymenophyllum tunbrigense | GB, VC14 East Sussex, Eridge Rocks | Arthur Langford Still | Harold Stuart Thompson | 7/1934 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC17 Surrey, Bookham Common | Arthur Langford Still | Arthur Langford Still Harold Stuart Thompson | 3/8/1924 | BIRM |
| Mentha arvensis | GB, VC17 Surrey, Holmwood Common | Arthur Langford Still | Harold Stuart Thompson | 6/9/1935 | BIRM |
| Mentha rubra | GB, VC17 Surrey, North Holmwood | Arthur Langford Still | Harold Stuart Thompson | 2/9/1935 | BIRM |
| Carex acuta | GB, VC17 Surrey, Ripley | Arthur Langford Still | Edward Charles Wallace Harold Stuart Thompson | 26/5/1934 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC21 Middlesex, Stanmore | Arthur Langford Still | Harold Stuart Thompson | 26/8/1938 | BIRM |
| Silene otites | GB, VC26,VC28, Barnhamcross Common | Arthur Langford Still | Edward Charles Wallace Harold Stuart Thompson | 7/7/1934 | BIRM |
| Cirsium tuberosum | GB, VC41 Glamorganshire, Nash Point Cultivated | Arthur Langford Still | Harold Stuart Thompson | 1935 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Parkmill | Eleanor Vachell | Harold Stuart Thompson Arthur Langford Still | 10/9/1934 | BIRM |
| Hymenophyllum wilsonii | GB, VC49 Caernarvonshire, Dolbadarn Castle | Arthur Langford Still | Harold Stuart Thompson Edward Charles Wallace | 27/6/1936 | BIRM |
| Mentha aquatica | GB, East Yorkshire, Warthill | | Arthur Langford Still Harold Stuart Thompson | 9/1885 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Parkmill | Eleanor Vachell | Arthur Langford Still | 15/9/1934 | SLBI |
| Verbena officinalis | GB, VC3 South Devon, Salcombe | Arthur Langford Still | Edward Charles Wallace | 20/8/1935 | SLBI |
| Polygala vulgaris subsp. collina | GB, VC4 North Devon, Cove, Landrake | Arthur Langford Still | Edward Charles Wallace | 2/7/1942 | SLBI |
| 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 rostrata | GB, VC12 North Hampshire, Waggoners Wells | Arthur Langford Still | Edward Charles Wallace | 7/7/1935 | E |
| 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 spicata | GB, VC17 Surrey, Bramley | Arthur Langford Still | Edward Charles Wallace | 4/9/1934 | K |
+ | Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC17 Surrey, Bramley | Arthur Langford Still | Edward Charles Wallace William Harold Pearsall | 4/9/1934 | MANCH |
| Mentha spicata x suaveolens = M. x villosa | GB, VC17 Surrey, Bramley | Arthur Langford Still | | 25/8/1935 | SLBI |
| Mentha spicata | GB, VC17 Surrey, Wallington Cultivated | Arthur Langford Still | Edward Charles Wallace | 29/8/1935 | K |
| Mentha aquatica var. weiheana | GB, VC17 Surrey, Woking | Arthur Langford Still Edward Charles Wallace | Edward Charles Wallace | 6/9/1935 | K |
| Carex strigosa | GB, VC24 Buckinghamshire, Penn | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 25/5/1933 | E |
| Aconitum napellus | GB, VC41 Glamorganshire, Peterston-super-Ely | Arthur Langford Still | Botanical Exchange Club of The British Isles Edward Charles Wallace | 14/6/1935 | SLBI |
| Trifolium scabrum | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Edward Charles Wallace | 19/6/1925 | SLBI |
| Carex vesicaria | GB, VC49 Caernarvonshire, Llyn Padarn | Arthur Langford Still | Edward Charles Wallace | 9/6/1936 | E |
| Carex disticha | GB, VC52 Anglesey, Llyn Coron | Arthur Langford Still | Edward Charles Wallace Robert MacKechnie | 29/6/1936 | E |
| Mentha spicata | GB, Ambiguous locality (GB), Wallington Cultivated | Arthur Langford Still | Edward Charles Wallace | 8/1935 | SLBI |
| Hieracium trichocaulon | GB, VC4 North Devon, Bampton | Arthur Langford Still | John Richard Wallis | 12/8/1942 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC4 North Devon, Tiverton | Arthur Langford Still | John Richard Wallis | 12/5/1941 | SLBI |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC4 North Devon, Tiverton | Arthur Langford Still | John Richard Wallis | 24/5/1941 | SLBI |
| Eleocharis uniglumis | GB, VC41 Glamorganshire, Baglan | Arthur Langford Still Edward Charles Wallace | Job Edward Lousley | 27/6/1935 | SLBI |
| Eleocharis uniglumis | GB, VC41 Glamorganshire, Llanmadoc | Arthur Langford Still | Job Edward Lousley | 29/6/1935 | SLBI |