| Marrubium vulgare | GB, VC6 North Somerset, Winscombe | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 24/8/1952 | K |
| Hypochaeris glabra | GB, VC9 Dorset, Sandford | John Patrick Micklethwait Brenan Norman Douglas Simpson | John Patrick Micklethwait Brenan | 28/6/1942 | K |
| Plantago coronopus | GB, VC10 Isle of Wight, Freshwater | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | | K |
| Satureja montana | GB, VC11 South Hampshire, Beaulieu Abbey | John Patrick Micklethwait Brenan Norman Douglas Simpson Richard Charles L'Estrange Burges | John Patrick Micklethwait Brenan | 5/9/1938 | K |
| Bupleurum tenuissimum | GB, VC11 South Hampshire, Hayling Island | John Patrick Micklethwait Brenan | | 1/10/1936 | K |
| Mentha arvensis | GB, VC14 East Sussex, Broadwater Forest | John Patrick Micklethwait Brenan | | 25/7/1935 | K |
| Callitriche intermedia subsp. hamulata | GB, VC14 East Sussex, Chailey Common | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 23/5/1936 | K |
| Cuscuta epithymum | GB, VC15 East Kent, Dungeness | John Patrick Micklethwait Brenan Noel Yvri Sandwith | | 20/9/1936 | K |
| Hypochaeris glabra | GB, VC15 East Kent, Dungeness | John Patrick Micklethwait Brenan | | 20/9/1936 | K |
| Linaria repens | GB, VC15 East Kent, Richborough Port | John Patrick Micklethwait Brenan | | 27/8/1936 | K |
| Glechoma hederacea | GB, VC15 East Kent, Sellindge | John Patrick Micklethwait Brenan | | 17/4/1936 | K |
| Callitriche truncata | GB, VC16 West Kent, Chipstead | John Patrick Micklethwait Brenan | | 10/7/1935 | K |
| Veronica persica var. kochiana | GB, VC16 West Kent, Halling | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 31/8/1939 | K |
| Lamium purpureum var. hybridum | GB, VC16 West Kent, Hildenborough | John Patrick Micklethwait Brenan | | 28/3/1936 | K |
| Potamogeton friesii x crispus = P. x lintonii | GB, VC16 West Kent, River Darent | John Patrick Micklethwait Brenan | Botanical Society & Exchange Club of The British Isles John Patrick Micklethwait Brenan | 17/9/1946 | SLBI |
| Potamogeton friesii x crispus = P. x lintonii | GB, VC16 West Kent, Riverhead | John Patrick Micklethwait Brenan | Job Edward Lousley | 17/9/1946 | SLBI |
| Potamogeton friesii x crispus = P. x lintonii | GB, VC16 West Kent, Riverhead | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 17/9/1946 | SLBI |
| Glebionis segetum | GB, VC16 West Kent, Sevenoaks | John Patrick Micklethwait Brenan | | 19/7/1936 | K |
| Glebionis segetum | GB, VC16 West Kent, Sevenoaks | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 12/9/1937 | K |
| Callitriche intermedia subsp. hamulata | GB, VC16 West Kent, Snodland | John Patrick Micklethwait Brenan | | 28/5/1936 | K |
| Dactylis glomerata | GB, VC16 West Kent, Snodland | John Patrick Micklethwait Brenan | | 28/5/1936 | K |
| Glechoma hederacea | GB, VC16 West Kent, Tonbridge | John Patrick Micklethwait Brenan | | 5/4/1935 | K |
| Lamium album | GB, VC16 West Kent, Tonbridge | John Patrick Micklethwait Brenan | | 9/5/1936 | K |
| Melissa officinalis | GB, VC16 West Kent, Tonbridge | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 23/8/1939 | K |
| Phalaris arundinacea | GB, VC16 West Kent, Tonbridge | John Patrick Micklethwait Brenan | | 28/6/1936 | K |
| Glebionis segetum | GB, VC16 West Kent, Tunbridge | John Patrick Micklethwait Brenan | | 28/6/1936 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC14,VC15,VC16, Hawkhurst | John Patrick Micklethwait Brenan | | 3/8/1935 | K |
| Callitriche stagnalis | GB, VC17 Surrey, Godalming | John Patrick Micklethwait Brenan | | 25/5/1935 | K |
| Linaria supina | GB, VC17 Surrey, Kew Cultivated GB, VC2 East Cornwall, Par | John Patrick Micklethwait Brenan | | 1949 | K |
| Linaria supina | GB, VC17 Surrey, Kew Cultivated GB, VC2 East Cornwall, Par | John Patrick Micklethwait Brenan | | 1949 | K |
| Plantago arenaria | GB, VC17 Surrey, Kew | John Patrick Micklethwait Brenan | | 12/8/1955 | K |
| Veronica filiformis | GB, VC17 Surrey, Ripley | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 3/5/1949 | K |
| Fallopia dumetorum | GB, VC17 Surrey, Wimbledon Common | John Patrick Micklethwait Brenan Noel Yvri Sandwith | John Patrick Micklethwait Brenan | 10/1948 | K |
| Glechoma hederacea | GB, VC17 Surrey, Wisley | John Patrick Micklethwait Brenan Noel Yvri Sandwith | John Patrick Micklethwait Brenan | 6/4/1946 | K |
| Glebionis segetum | GB, VC18 South Essex, Dagenham | John Patrick Micklethwait Brenan | | 30/8/1936 | K |
+ | Bupleurum tenuissimum | GB, VC18 South Essex, Tilbury | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 2/9/1944 | MANCH |
+ | Bupleurum tenuissimum | GB, VC18 South Essex, Tilbury | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 2/9/1944 | MANCH |
| Bupleurum tenuissimum | GB, VC18 South Essex, Tilbury | John Patrick Micklethwait Brenan | | 2/9/1944 | K |
| Bupleurum tenuissimum | GB, VC18 South Essex, Tilbury | John Norton Mills John Patrick Micklethwait Brenan | | 2/9/1944 | K |
+ | Bupleurum tenuissimum | GB, VC18 South Essex, Tilbury | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 2/9/1944 | MANCH |