| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Goonhavern | Chambre Corker Vigurs | Frederick Hamilton Davey | 1/9/1912 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Goonhavern | Chambre Corker Vigurs | Watson Botanical Exchange Club Joseph Edward Little Frederick Hamilton Davey | 9/1912 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey Spencer Henry Bickham | Spencer Henry Bickham | 1/10/1904 | CGE |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 24/8/1911 | CGE |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | | 30/8/1911 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 30/8/1911 | CGE |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 30/8/1911 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 30/8/1911 | CGE |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey Spencer Henry Bickham | 3/8/1911 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey | 19/9/1902 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey | Spencer Henry Bickham | 23/8/1903 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey Spencer Henry Bickham | Spencer Henry Bickham | 1/10/1904 | CGE |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Ponsanooth | | Frederick Hamilton Davey | 19/9/1902 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Porkellis | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert John Crosfield | 9/9/1907 | CGE |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Praa Sands | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey Spencer Henry Bickham | 16/9/1911 | CGE |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC1 West Cornwall, Tresamble, Gwennap | Frederick Hamilton Davey Spencer Henry Bickham | Spencer Henry Bickham | 1/10/1904 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey | 9/9/1907 | CGE |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Wendron | Frederick Hamilton Davey | Frederick Hamilton Davey | 9/9/1907 | CGE |
| Scrophularia scorodonia | GB, VC1 West Cornwall, Flushing | Frederick Hamilton Davey | Alexander Somerville | 26/6/1901 | E |
| Mentha spicata | GB, VC1 West Cornwall, Bissoe | Frederick Hamilton Davey Spencer Henry Bickham | Watson Botanical Exchange Club Albert Bruce Jackson Spencer Henry Bickham | 1/10/1904 | K |
| Gentianella campestris | GB, VC1 West Cornwall, Connor Downs | Frederick Hamilton Davey | Watson Botanical Exchange Club | 15/9/1905 | K |
| Mentha x cordifolia | GB, VC1 West Cornwall, Feock,Carnon Downs | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 9/10/1907 | K |
| Mentha x cordifolia | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 24/8/1911 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Edward Britton Frederick Hamilton Davey | 16/8/1911 | K |
| Mentha x maximilianea | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 4/9/1911 | K |
| Mentha pulegium | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey Spencer Henry Bickham | | 1/10/1904 | K |
| Mentha arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Porkellis | Frederick Hamilton Davey | Frederick Hamilton Davey | 9/9/1907 | K |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Porkellis | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 9/9/1907 | K |
| Veronica peregrina | GB, VC1 West Cornwall, Truro,Killiow | Frederick Hamilton Davey | Watson Botanical Exchange Club Albert Bruce Jackson Frederick Hamilton Davey | 4/8/1906 | K |
| Linaria supina | GB, VC2 East Cornwall, Par | Frederick Hamilton Davey | Alexander Somerville | 6/7/1901 | K |
| Carex paniculata x remota = C. x boenninghauseniana | GB, VC1 West Cornwall, Barras Moor, Ponsanooth | Frederick Hamilton Davey | William Wise | 8/6/1905 | LAUS |
| Euphrasia micrantha | GB, VC1 West Cornwall, Goonhavern | Frederick Hamilton Davey | | 16/8/1905 | LAUS |
| Ulex gallii | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 16/8/1905 | LAUS |
| Polygala serpyllifolia var. vincoides | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 12/10/1905 | LAUS |
| Potentilla erecta var. sciaphila | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 10/10/1908 | LAUS |
| Fumaria reuteri | GB, VC1 West Cornwall, Gwennap | | Frederick Hamilton Davey | 2/10/1905 | LAUS |
| Nitella hyalina | GB, VC1 West Cornwall, Loe Pool | Frederick Hamilton Davey | William Wise | 8/9/1898 | LAUS |
| Fumaria occidentalis | GB, VC1 West Cornwall, Newquay | Frederick Hamilton Davey | Frederick Hamilton Davey | 7/8/1905 | LAUS |
| Galeopsis bifida | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey | | 22/9/1905 | LAUS |
| Fumaria muralis subsp. boraei | GB, VC1 West Cornwall, Ponsanooth | Frederick Hamilton Davey | Frederick Hamilton Davey | 23/9/1905 | LAUS |