| Misopates orontium | GB, VC4 North Devon, Braunton | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 22/6/1940 | K |
| Oenanthe fistulosa | GB, VC13 West Sussex, Pulborough | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 29/6/1957 | K |
| Origanum vulgare | GB, VC17 Surrey, Abinger Hammer | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 29/7/1934 | K |
| Plantago coronopus | IE, VCH1 South Kerry, Ventry Harbour | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 28/6/1938 | K |
| Plantago coronopus | IE, VCH1 South Kerry, Great Blasket Island | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 1/7/1938 | K |
| Plantago lanceolata var. sphaerostachya | IE, VCH1 South Kerry, Great Blasket Island | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 1/7/1938 | K |
| Plantago major | GB, VC6 North Somerset, Cheddar Gorge | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 9/7/1939 | K |
| Plantago maritima | GB, VC18 South Essex, Canvey Island | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 1/7/1934 | K |
| Plantago maritima | IE, VCH1 South Kerry, Ventry | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 29/6/1938 | K |
| Plantago maritima | IE, VCH1 South Kerry, Great Blasket Island | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 12/7/1938 | K |
| Plantago maritima | GB, VC18 South Essex, Canvey Island | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 1/7/1934 | K |
| Primula vulgaris | IE, VCH1 South Kerry, Dingle | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 5/7/1938 | K |
| Ranunculus arvensis | GB, VC17 Surrey, Betchworth GB, VC17 Surrey, Brockham | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 21/5/1933 | K |
| Scrophularia nodosa | IE, VCH1 South Kerry, Kenmare | Brian Lawrence Burtt Stella Ross-Craig | | 15/6/1938 | K |
| Scrophularia nodosa | IE, Kerry, Killarney | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 5/5/1935 | K |
| Scrophularia nodosa | IE, VCH1 South Kerry, Killarney | Brian Lawrence Burtt Stella Ross-Craig | | 15/6/1938 | K |
| Scrophularia nodosa | IE, VCH2 North Kerry, Lough Guitane | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 5/9/1935 | K |
| Scutellaria galericulata | GB, VC4 North Devon, Braunton Burrows | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 26/6/1940 | K |
| Scutellaria minor | IE, VCH2 North Kerry, Lough Guitane | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 5/9/1935 | K |
| Sibthorpia europaea | IE, VCH1 South Kerry, Dingle | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 6/7/1938 | K |
| Stachys officinalis | GB, VC17 Surrey, Horsley | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 9/7/1933 | K |
| Stachys officinalis | GB, VC70 Cumberland, Rosthwaite | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 11/7/1947 | K |
| Stachys palustris | IE, Kerry, Killarney | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 2/9/1935 | K |
| Stachys palustris | IE, VCH1 South Kerry, Killarney | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 2/9/1935 | K |
| Stachys palustris | IE, VCH1 South Kerry, Killarney | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 2/9/1935 | K |
| Thymus chamaedrys | GB, VC17 Surrey, Hackhurst Downs | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 26/7/1936 | K |
| Thymus chamaedrys | GB, VC17 Surrey, Ranmore Common | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 26/7/1936 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Ventry Harbour | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 28/6/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH2 North Kerry, Killarney, Muckross | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 14/7/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH2 North Kerry, Muckross | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 14/7/1938 | K |
| Thymus praecox subsp. arcticus | GB, VC70 Cumberland, Borrowdale | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 10/7/1947 | K |
| Thymus praecox subsp. arcticus | IE, Kerry, Caherbla | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 8/7/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH2 North Kerry, Muckross | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 29/8/1935 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Cummeenduff Glen | Brian Lawrence Burtt Stella Ross-Craig | | 19/6/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH2 North Kerry, Muckross House | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 29/8/1935 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Cummeenduff Glen | Brian Lawrence Burtt Stella Ross-Craig | | 19/6/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Cummeenduff Glen | Brian Lawrence Burtt Stella Ross-Craig | | 19/6/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Ventry Harbour | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 28/6/1938 | K |
| Thymus praecox subsp. arcticus | IE, VCH1 South Kerry, Cummeenduff Glen | Brian Lawrence Burtt Stella Ross-Craig | | 19/6/1938 | K |
| Verbascum phlomoides | GB, VC17 Surrey, Bookham | Brian Lawrence Burtt Joseph Robert Sealy Stella Ross-Craig | | 15/10/1933 | K |