| Mentha suaveolens x longifolia = M. x rotundifolia | GB, VC45 Pembrokeshire, Manorbier | Joseph Donald Grose | Arthur Langford Still | 13/9/1937 | SLBI |
| Mentha pulegium | GB, VC41 Glamorganshire, Reynoldston | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 8/8/1934 | SLBI |
| Carex muricata subsp. pairae | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Job Edward Lousley | 19/6/1925 | SLBI |
| Chenopodium murale | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Arthur Langford Still | 26/6/1935 | SLBI |
| Polygala vulgaris | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 16/6/1935 | SLBI |
| Trifolium scabrum | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Edward Charles Wallace | 19/6/1925 | SLBI |
| Trifolium striatum | GB, VC41 Glamorganshire, Porthcawl | Arthur Langford Still | Job Edward Lousley | 15/6/1905 | SLBI |
| 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 |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Parkmill, Gower | Arthur Langford Still | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 1/9/1937 | OXF |
| Mentha aquatica | GB, VC41 Glamorganshire, Parkmill | Arthur Langford Still | Job Edward Lousley | 10/9/1934 | 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 |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Parkmill | Eleanor Vachell | Harold Stuart Thompson Arthur Langford Still | 10/9/1934 | BIRM |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Parkmill | Eleanor Vachell | Arthur Langford Still | 15/9/1934 | SLBI |
| Cirsium tuberosum | GB, VC41 Glamorganshire, Nash Point Cultivated | Arthur Langford Still | Harold Stuart Thompson | 1935 | BIRM |
| Cirsium tuberosum | GB, VC41 Glamorganshire, Nash | Arthur Langford Still | | 25/6/1935 | SLBI |
| Hypochaeris glabra | GB, VC41 Glamorganshire, Merthyr Mawr Warren | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 21/6/1925 | SLBI |
| Mentha aquatica | GB, VC41 Glamorganshire, Llanrhidian | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 12/8/1934 | SLBI |
| Mentha arvensis | GB, VC41 Glamorganshire, Llanrhidian | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 12/8/1934 | SLBI |
| Eleocharis uniglumis | GB, VC41 Glamorganshire, Llanmadoc | Arthur Langford Still | Job Edward Lousley | 29/6/1935 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC41 Glamorganshire, Llangennith,Coity Green | Arthur Langford Still | Job Edward Lousley | 2/9/1937 | SLBI |
| Fumaria bastardii | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace | 16/8/1934 | SLBI |
| Mentha aquatica x spicata = M. x piperita | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 11/8/1934 | SLBI |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 11/8/1934 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace | 16/9/1934 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Botanical Exchange Club of The British Isles Edward Charles Wallace Job Edward Lousley | 10/8/1934 | SLBI |
| Mentha spicata | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 16/8/1934 | SLBI |
| Mentha spicata | GB, VC41 Glamorganshire, Llangennith | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 10/8/1934 | SLBI |
| Dactylorhiza incarnata | GB, VC41 Glamorganshire, Kenfig | Arthur Langford Still | Job Edward Lousley | 30/6/1935 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Gower Cultivated | Arthur Langford Still | Job Edward Lousley | 10/8/1939 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Gower Cultivated | Arthur Langford Still | | 10/8/1939 | SLBI |
| Carex acuta | GB, VC41 Glamorganshire, Ewenny | Arthur Langford Still | Job Edward Lousley | 20/6/1935 | SLBI |
| Thalictrum flavum | GB, VC41 Glamorganshire, Ewenny | Arthur Langford Still | Job Edward Lousley | 2/7/1925 | SLBI |
| Mentha aquatica | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 13/8/1934 | SLBI |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC41 Glamorganshire, Bishopston | Esther J Bowen | Arthur Langford Still | 23/9/1934 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Botanical Society & Exchange Club of The British Isles Druce Herbarium, Oxford | 3/9/1937 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 13/8/1934 | SLBI |
| Mentha gentilis var. vesana | GB, VC41 Glamorganshire, Bishopston | Arthur Langford Still | Botanical Exchange Club of The British Isles | 3/9/1937 | K |
| Coincya monensis subsp. cheiranthos | GB, VC41 Glamorganshire, Baglan Sandhills | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 27/6/1935 | SLBI |
| Eleocharis uniglumis | GB, VC41 Glamorganshire, Baglan | Arthur Langford Still Edward Charles Wallace | Job Edward Lousley | 27/6/1935 | SLBI |
| Hirschfeldia incana | GB, VC41 Glamorganshire, Baglan | Arthur Langford Still | Edward Charles Wallace Job Edward Lousley | 27/6/1935 | SLBI |