| 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 |
| Potentilla erecta x reptans = P. x italica | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Bailey | 6/1912 | MANCH |
| Potentilla erecta x reptans = P. x italica | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Richard Barker Ullman Botanical Exchange Club of The British Isles Patrick Martin Hall | 6/1912 | SLBI |
+ | Fumaria reuteri | GB, VC1 West Cornwall, Perranarworthal, Gilly Farm, Tresamble | Frederick Hamilton Davey | Frederick Hamilton Davey | 11/10/1911 | MANCH |
| Quercus ilex | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 2/10/1911 | SLBI |
| Potentilla anglica | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Frederick Hamilton Davey | 30/9/1911 | SLBI |
| Potentilla sterilis | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Frederick Hamilton Davey | 30/9/1911 | SLBI |
| Calluna vulgaris | GB, VC1 West Cornwall, Bissoe | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 16/9/1911 | SLBI |
+ | Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Lizard | Frederick Hamilton Davey | Frederick Hamilton Davey | 16/9/1911 | MANCH |
| 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 aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
| Mentha aquatica x spicata = M. x piperita | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 4/9/1911 | OXF |
+ | Mentha aquatica x suaveolens = M. x suavis | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Bailey | 4/9/1911 | MANCH |
| 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 |
| Erica cinerea | GB, VC1 West Cornwall, Carnon Croft | Frederick Hamilton Davey | Allan Octavian Hume | 2/9/1911 | SLBI |
| Erica cinerea | GB, VC1 West Cornwall, Kea | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 2/9/1911 | SLBI |
| Erica cinerea | GB, VC1 West Cornwall, Truro | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey Harold Stuart Thompson | 2/9/1911 | BIRM |
| 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 arvensis x aquatica x spicata = M. x smithiana | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 30/8/1911 | SLBI |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey Henry Elliott Fox | 30/8/1911 | OXF |
| Mentha arvensis x spicata = M. x gracilis | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Watson Botanical Exchange Club Frederick Hamilton Davey George Claridge Druce | 30/8/1911 | OXF |
| 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 spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Charles Bailey | 30/8/1911 | MANCH |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | 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 spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Bailey | 30/8/1911 | MANCH |
+ | Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Hick's Mill, Gwennap | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Bailey | 30/8/1911 | MANCH |
| Silene uniflora | GB, VC1 West Cornwall, Loe Pool | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 29/8/1911 | SLBI |
| Mentha spicata x suaveolens = M. x villosa | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Frederick Hamilton Davey | 24/8/1911 | CGE |
| 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 suaveolens x longifolia = M. x rotundifolia | GB, VC1 West Cornwall, Gwennap | Frederick Hamilton Davey | Watson Botanical Exchange Club Charles Bailey | 23/8/1911 | MANCH |
| 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 arvensis x aquatica = M. x verticillata | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 16/8/1911 | SLBI |
| 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 |
| Castanea sativa | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | | 19/7/1911 | SLBI |
| Rubus rilstonei | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume | 16/7/1911 | SLBI |
| Rubus rilstonei | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume | 16/7/1911 | SLBI |
| Rubus rilstonei | GB, VC1 West Cornwall, Perranarworthal | Frederick Hamilton Davey | Allan Octavian Hume | 16/7/1911 | SLBI |
| Centaurea aspera | GB, VC2 East Cornwall, Par | Frederick Hamilton Davey | Allan Octavian Hume Frederick Hamilton Davey | 8/7/1911 | SLBI |