| Thymus praecox subsp. arcticus | GB, VC17 Surrey, Buckland | Charles Edgar Salmon | Charles Edgar Salmon | 27/8/1910 | K |
| Thymus praecox subsp. arcticus | GB, VC79 Selkirkshire, Thornielee | Ida Margaret Hayward | Botanical Exchange Club of The British Isles Charles Edward Britton Ida Margaret Hayward | 29/6/1911 | K |
| Thymus praecox subsp. arcticus | GB, VC59 South Lancashire, Hightown | James Alfred Wheldon | Charles Edward Britton James Alfred Wheldon | 15/7/1911 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Lelant | Edgar Thurston | Edgar Thurston | 1912 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Guernsey,Vazon Bay | Albert Bruce Jackson | | 1912 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Stoney Stanton | M Holland | | 1913 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Gerrans | Edgar Thurston | Edgar Thurston | 8/7/1913 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Guernsey,Vazon Bay | Albert Bruce Jackson | Albert Bruce Jackson | 1914 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Vazon Bay, Guernsey | Albert Bruce Jackson | Albert Bruce Jackson | 1914 | K |
| Thymus praecox subsp. arcticus | GB, VC111 Orkney, Hoy | Henry Halcro Johnston | | 23/6/1914 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Vazon Bay, Guernsey | Albert Bruce Jackson | Albert Bruce Jackson | 31/7/1914 | K |
| Thymus praecox subsp. arcticus | GB, VC113 Channel Islands, Vazon Bay, Guernsey | Albert Bruce Jackson | Albert Bruce Jackson | 31/7/1914 | K |
| Thymus praecox subsp. arcticus | GB, VC111 Orkney, Hoy | Henry Halcro Johnston | | 7/9/1914 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Walton in Gordano | Henry Francois Devis | | 15/7/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Polden Hills | Victor Samuel Summerhayes | | 18/7/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Fairbourne | Charles Edward Britton | Botanical Exchange Club of The British Isles Charles Edward Britton William Charles Barton | 4/8/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Fairbourne | William Charles Barton | Watson Botanical Exchange Club William Charles Barton | 4/8/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Harlech Golf Club | William Charles Barton | Botanical Exchange Club of The British Isles Charles Edward Britton William Charles Barton | 11/8/1915 | K |
| Thymus praecox subsp. arcticus | GB, VC6 North Somerset, Asham Wood | Henry Francois Devis | | 29/6/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Saltby | Arthur Reginald Horwood | | 2/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Clipsham | Arthur Reginald Horwood | | 5/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Greetham | Arthur Reginald Horwood | | 5/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Rutland | Arthur Reginald Horwood | Arthur Reginald Horwood | 5/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Croxton Kerrial | Arthur Reginald Horwood | | 18/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC55 Leicestershire, Harston | Arthur Reginald Horwood | | 18/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC70 Cumberland, Saint Bees | Lester Vallis Lester-Garland | Lester Vallis Lester-Garland | 30/7/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC111 Orkney, Head of Holland | Henry Halcro Johnston | | 2/9/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC10 Isle of Wight, Freshwater | William Charles Barton | Albert Bruce Jackson William Charles Barton | 14/9/1916 | K |
| Thymus praecox subsp. arcticus | GB, VC4 North Devon, Wilsham | | J Fraser William Charles Barton | 28/8/1917 | K |
| Thymus praecox subsp. arcticus | GB, VC41 Glamorganshire, Barry Island | Arthur Edward Wade | National Museum of Wales | 7/1920 | K |
| Thymus praecox subsp. arcticus | GB, VC41 Glamorganshire, Barry Island | Arthur Edward Wade | Botanical Exchange Club of The British Isles Charles Edward Britton | 7/1920 | K |
| Thymus praecox subsp. arcticus | GB, VC41 Glamorganshire, Barry, Cold Knap | Arthur Edward Wade | Botanical Exchange Club of The British Isles Charles Edward Britton | 7/1920 | K |
| Thymus praecox subsp. arcticus | GB, VC41 Glamorganshire, Caerphilly | Arthur Edward Wade | Botanical Exchange Club of The British Isles Charles Edward Britton | 7/1920 | K |
| Thymus praecox subsp. arcticus | GB, VC82 East Lothian, Longniddry | Noel James Gillies Smith | | 6/1921 | K |
| Thymus praecox subsp. arcticus | GB, VC87 West Perthshire, Callander | Noel James Gillies Smith | | 7/1921 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Dolgellau, Pont Newydd | William Charles Barton | Botanical Exchange Club of The British Isles William Charles Barton | 8/8/1923 | K |
| Thymus praecox subsp. arcticus | GB, VC48 Merionethshire, Dolgellau, Pont Newydd | William Charles Barton | Botanical Exchange Club of The British Isles William Charles Barton | 8/8/1923 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Saint Breock | Edgar Thurston | Edgar Thurston | 8/7/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Newquay | Edgar Thurston | | 19/7/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Newquay, Fistral Beach | Edgar Thurston | Edgar Thurston | 19/7/1924 | K |