| Thymus praecox subsp. arcticus | GB, VC83 Midlothian, Whitelaw Cleugh | David Philcox | | 2/9/1961 | K |
| Thymus praecox subsp. arcticus | GB, VC110 Outer Hebrides, Clachan | | | 17/7/1961 | K |
| Thymus praecox subsp. arcticus | IE, VCH9 Co. Clare, Ballyvaghan | H M Burkill | | 20/8/1958 | K |
| Thymus praecox subsp. arcticus | IE, VCH38 Co. Down, Benderg Bay | Robert Desmond Meikle | | 8/1957 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Salcombe Hill | William Bertram Turrill | | 25/6/1957 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Sennen Cove | J D M Pearson | | 13/11/1956 | K |
| Thymus praecox subsp. arcticus | GB, VC26 West Suffolk, Kentford | Clifford Charles Townsend | Clifford Charles Townsend | 16/8/1956 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Priddy | Eric Marsden Marsden-Jones | | 28/7/1956 | K |
| Thymus praecox subsp. arcticus | GB, VC14 East Sussex, Seaford | Irene Blewett | | 23/6/1956 | K |
| Thymus praecox subsp. arcticus | GB, VC108 West Sutherland, Loch an Aigeil | Alastair Andrew Ross Henderson | Alastair Andrew Ross Henderson Murray Ross Henderson | 12/7/1955 | K |
| Thymus praecox subsp. arcticus | GB, VC47 Montgomeryshire, Aberhafesp | George Bertram Milne-Redhead | | 7/7/1955 | K |
| Thymus praecox subsp. arcticus | GB, VC47 Montgomeryshire, Llanymynech Hill, Carreghofa | Edgar Wolston Bertram Handsley Milne-Redhead | | 6/7/1955 | K |
| Thymus praecox subsp. arcticus | GB, VC47 Montgomeryshire, Abermule | Victor Samuel Summerhayes | | 3/7/1955 | K |
| Thymus praecox subsp. arcticus | GB, VC10 Isle of Wight, Saint Helen's | Irene Muller | | 9/1954 | K |
| Thymus praecox subsp. arcticus | GB, VC12 North Hampshire, Cheesefoot head | Edgar Wolston Bertram Handsley Milne-Redhead | | 28/6/1954 | K |
| Thymus praecox subsp. arcticus | GB, VC12 North Hampshire, Cheesefoot head | Edgar Wolston Bertram Handsley Milne-Redhead | | 28/6/1954 | K |
| Thymus praecox subsp. arcticus | GB, VC112 Shetland, Balta Sound | Richard William George Dennis | | 23/8/1952 | K |
| Thymus praecox subsp. arcticus | GB, VC82 East Lothian, Aberlady | William Bertram Turrill | | 11/8/1951 | K |
| Thymus praecox subsp. arcticus | IE, VCH18,VCH25, Clonmacnoise | David Allardice Webb | Trinity College, Dublin | 30/7/1951 | K |
| Thymus praecox subsp. arcticus | GB, Suffolk, Eriswell | Christopher Donald Pigott | Botanical Society of The British Isles Cambridge University | 7/1951 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Boscastle | William Thomas Stearn | | 12/9/1950 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Tintagel | William Thomas Stearn | | 12/9/1950 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Cader Idris | D O Jones | Clifford Charles Townsend | 25/8/1950 | K |
| Thymus praecox subsp. arcticus | GB, VC4 North Devon, Ilfracombe | Clifford Charles Townsend | Clifford Charles Townsend | 21/6/1950 | K |
| Thymus praecox subsp. arcticus | IE, VCH3 West Cork, Sherkin Island | Oleg Vladimir Polunin Palmer John Newbould | | 25/7/1949 | K |
| Thymus praecox subsp. arcticus | GB, VC33 East Gloucestershire, Sheepscombe | Clifford Charles Townsend | | 23/7/1949 | K |
| Thymus praecox subsp. arcticus | IE, VCH3 West Cork, Sherkin Island | Oleg Vladimir Polunin Palmer John Newbould | | 23/7/1949 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Grosnez, Jersey | | | 28/6/1949 | K |
| Thymus praecox subsp. arcticus | GB, VC34 West Gloucestershire, Wigpool Common | Clifford Charles Townsend | Clifford Charles Townsend | 25/6/1949 | K |
| Thymus praecox subsp. arcticus | GB, VC37 Worcestershire, Great Malvern | Clifford Charles Townsend | | 24/8/1948 | K |
| Thymus praecox subsp. arcticus | GB, VC88 Mid Perthshire, Ben Lawers,Lochan nan Cat | Noel Yvri Sandwith | | 18/7/1948 | K |
| Thymus praecox subsp. arcticus | GB, VC33 East Gloucestershire, Cheltenham,Leckhampton Hill | Clifford Charles Townsend | Clifford Charles Townsend | 17/7/1948 | K |
| Thymus praecox subsp. arcticus | IE, VCH33 Fermanagh, Lattone Lough | Edward Norman Carrothers | | 12/7/1948 | K |
| Thymus praecox subsp. arcticus | GB, VC41 Glamorganshire, Barry Island | Patricia Lewis | | 10/7/1948 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Cader Idris, Mynydd Gwerngraig | Peter Geoffrey Taylor | | 30/6/1948 | K |
| Thymus praecox subsp. arcticus | GB, Gloucestershire, Sapperton | Clifford Charles Townsend | | 23/8/1947 | K |
| Thymus praecox subsp. arcticus | GB, VC49 Caernarvonshire, Capel Curig | Victor Samuel Summerhayes | | 20/7/1947 | K |
| Thymus praecox subsp. arcticus | GB, VC96 East Inverness-shire, Glen Cannich | Clifford Charles Townsend | | 16/7/1947 | K |
| Thymus praecox subsp. arcticus | GB, VC96 East Inverness-shire, Glen Affric | Noel Yvri Sandwith | | 12/7/1947 | K |
| Thymus praecox subsp. arcticus | GB, VC70 Cumberland, Borrowdale | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 10/7/1947 | K |