| Thymus polytrichus subsp. britannicus | GB, VC48 Merionethshire, Dolgellau, Pont Newydd | William Charles Barton | Watson Botanical Exchange Club William Charles Barton | 8/8/1923 | SLBI |
| Thymus praecox subsp. arcticus | Cultivated | | William Jackson Hooker | | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Callestick | Francis Rilstone | | 29/8/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Hayle | Arthur Allman Bullock | | 11/6/1933 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Holywell Bay | Edgar Thurston | | 3/8/1929 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Holywell Bay | Edgar Thurston | | 3/8/1929 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Kynance Cove | H Jennison | | 28/8/1929 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Lelant | Edgar Thurston | Edgar Thurston | 1912 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Nanjizal | William Bertram Turrill | | 19/7/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Nanjizal | William Bertram Turrill | | 19/7/1932 | 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 |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Perranporth | Edgar Thurston | Edgar Thurston | 23/7/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Porthcurnow | William Bertram Turrill | | 22/7/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Porthtowan | W E Bunney | | 7/8/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Sennen Cove | J D M Pearson | | 13/11/1956 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Ventongimps | Francis Rilstone | Botanical Exchange Club of The British Isles Charles Edward Britton Francis Rilstone | 9/8/1929 | K |
| Thymus praecox subsp. arcticus | GB, VC1 West Cornwall, Ventongimps | Francis Rilstone | Botanical Exchange Club of The British Isles Charles Edward Britton Francis Rilstone | 9/8/1929 | 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, Gerrans | Edgar Thurston | Edgar Thurston | 8/7/1913 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Hensbarrow Down | Edgar Thurston | | 22/8/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Polperro | Francis Rilstone | Botanical Exchange Club of The British Isles | 29/7/1928 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Polperro | Francis Rilstone | Botanical Exchange Club of The British Isles | 28/7/1928 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Polperro | Francis Rilstone | Botanical Exchange Club of The British Isles | 29/7/1928 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Polperro | Francis Rilstone | Botanical Society & Exchange Club of The British Isles Charles Edward Britton | 29/7/1928 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Polzeath | Edgar Thurston | | 19/8/1928 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Port Holland | Edgar Thurston | | 24/8/1929 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Saint Breock | Edgar Thurston | Edgar Thurston | 8/7/1924 | K |
| Thymus praecox subsp. arcticus | GB, VC2 East Cornwall, Tintagel | William Thomas Stearn | | 12/9/1950 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Dawlish Warren | Francis Morland Day | | 24/8/1936 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Dawlish Warren | Francis Morland Day | | 24/8/1936 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Kingskerswell | Thomas Stephenson | | 18/7/1936 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Labrador | M E Edmonds | | 19/8/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Lydford | William Thomas Stearn | | 7/7/1941 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Maidencombe | M E Edmonds | | 21/7/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Newton Abbot | M E Edmonds | | 23/7/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Salcombe Hill | William Bertram Turrill | | 25/6/1957 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Slapton Ley | M E Edmonds | | 16/8/1932 | K |
| Thymus praecox subsp. arcticus | GB, VC3 South Devon, Torquay | Thomas Stephenson | | 7/1936 | K |
| Thymus praecox subsp. arcticus | GB, VC4 North Devon, Braunton Burrows | William Bertram Turrill | | 12/7/1939 | K |