| Mentha spicata x suaveolens = M. x villosa var. nicholsoniana | GB, VC36 Herefordshire, Dinedor Camp | Francis Morland Day | | | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC36 Herefordshire, Much Marcle | Francis Morland Day | | | K |
| Mentha arvensis | GB, VC4 North Devon, Braunton | Francis Morland Day | | 26/8/1925 | K |
| Viola lactea | GB, VC3 South Devon, Newton Abbot | Francis Morland Day William Keble Martin | | 23/4/1933 | K |
| Blysmus compressus | GB, VC37 Worcestershire, Castlemorton | Francis Morland Day | | 4/6/1933 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC37 Worcestershire, Malvern | Francis Morland Day | | 3/7/1934 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Brixham | Francis Morland Day | J Fraser | 1/9/1934 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Brixham | Francis Morland Day | | 11/9/1934 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC36 Herefordshire, Colwall | Francis Morland Day | | 10/1934 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC37 Worcestershire, Malvern | Francis Morland Day | | 10/1934 | K |
| Mentha pulegium | GB, VC3 South Devon, Malborough | Francis Morland Day | | 4/8/1935 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC3 South Devon, Brixham | Francis Morland Day | | 4/8/1935 | K |
| Mentha aquatica | GB, VC3 South Devon, Yalberton | Francis Morland Day | | 7/8/1935 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Brixham | Francis Morland Day | | 12/8/1935 | K |
| Mentha arvensis var. austriaca | GB, VC3 South Devon, Lustleigh | Francis Morland Day | | 16/8/1935 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Brixham | Francis Morland Day | | 20/8/1935 | K |
| Mentha aquatica | GB, VC4 North Devon, Braunton Burrows | Francis Morland Day | | 22/8/1935 | K |
| Mentha pulegium | GB, VC3 South Devon, Lannacombe Bay | Francis Morland Day | | 28/8/1935 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Brixham | Francis Morland Day | | 29/8/1935 | K |
| Mentha pulegium | GB, VC37 Worcestershire, Castlemorton | Francis Morland Day | | 9/1935 | K |
| Mentha x cordifolia | GB, VC3 South Devon, Newton Abbot | Francis Morland Day | | 9/1935 | K |
| Mentha aquatica | GB, VC3 South Devon, Teigngrace | Francis Morland Day | | 9/9/1935 | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC3 South Devon, Newton Abbot | Francis Morland Day | | 9/9/1935 | K |
| Mentha spicata | GB, VC3 South Devon, Newton Abbot | Francis Morland Day | | 18/9/1935 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC37 Worcestershire, Malvern, Barnard's Green | Francis Morland Day | | 24/9/1935 | K |
| Mentha spicata | GB, VC37 Worcestershire, Pickersleigh | Francis Morland Day | | 24/9/1935 | K |
| Mentha spicata x suaveolens = M. x villosa | GB, VC37 Worcestershire, Malvern | Francis Morland Day | | 24/9/1935 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC37 Worcestershire, Malvern, Barnard's Green | Francis Morland Day | | 24/9/1935 | K |
| Mentha suaveolens | GB, VC37 Worcestershire, Mathon | Francis Morland Day | | 10/1935 | 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 |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC25 East Suffolk, Southwold | Francis Morland Day | | 29/8/1936 | K |
| Mentha piperita var. piperita | GB, VC34 West Gloucestershire, Bromsberrow | Francis Morland Day | | 2/7/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Marldon | Francis Morland Day | | 3/8/1937 | K |
| Mentha x verticillata var. rivalis | GB, VC3 South Devon, Drewsteignton | Francis Morland Day | | 10/8/1937 | K |
| Mentha x verticillata var. paludosa | GB, VC3 South Devon, Drewsteignton | Francis Morland Day | | 10/8/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Yalberton | Francis Morland Day | | 11/8/1937 | K |
| Mentha arvensis | GB, VC3 South Devon, Widecombe in the Moor | Francis Morland Day | | 17/8/1937 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC3 South Devon, Widecombe in the Moor | Francis Morland Day | | 17/8/1937 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC3 South Devon, Widdecombe | Francis Morland Day | | 17/8/1937 | K |