| Veronica hederifolia | GB, VC1 West Cornwall, Gweek | John Patrick Micklethwait Brenan | | 3/4/1976 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC1 West Cornwall, Gwinear | John Patrick Micklethwait Brenan N E G Cruttwell | John Patrick Micklethwait Brenan | 9/8/1943 | K |
+ | Cynodon dactylon | GB, VC1 West Cornwall, Penzance,Marazion | John Patrick Micklethwait Brenan N E G Cruttwell | John Norton Mills | 5/8/1943 | MANCH |
| Glechoma hederacea | GB, VC1 West Cornwall, Ponsanooth | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 26/3/1937 | K |
| Callitriche stagnalis | GB, VC2 East Cornwall, Fowey | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 16/6/1949 | K |
| Linaria supina | GB, VC2 East Cornwall, Par Sands | John Patrick Micklethwait Brenan | | 28/8/1934 | K |
| Festuca arundinacea | GB, VC2 East Cornwall, Portscatho | John Patrick Micklethwait Brenan Richard Alexander Fraser Brenan | | 23/6/1949 | K |
| Stachys sylvatica x palustris = S. x ambigua | GB, VC2 East Cornwall, Saint Mawes | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 23/6/1949 | K |
+ | Wahlenbergia hederacea | GB, VC3 South Devon, Chagford | John Patrick Micklethwait Brenan | John Norton Mills | 2/8/1941 | MANCH |
| Hypochaeris glabra | GB, VC3 South Devon, East Portlemouth | John Patrick Micklethwait Brenan | | 12/6/1938 | K |
| Veronica filiformis | GB, VC3 South Devon, Kilmington | John Patrick Micklethwait Brenan | | 3/7/1954 | K |
| Verbascum virgatum | GB, VC3 South Devon, Man Sands | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 28/7/1937 | K |
| Verbascum virgatum | GB, VC3 South Devon, Man Sands | John Patrick Micklethwait Brenan | | 28/7/1957 | K |
| Callitriche obtusangula | GB, VC4 North Devon, Appledore | John Patrick Micklethwait Brenan | | 21/5/1936 | K |
| Callitriche truncata | GB, VC5 South Somerset, Taunton | John Patrick Micklethwait Brenan | | 8/9/1936 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC5 South Somerset, Triscombe | John Patrick Micklethwait Brenan | | 23/9/1957 | K |
| Mentha arvensis x aquatica = M. x verticillata | GB, VC5 South Somerset, Triscombe | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 23/9/1957 | K |
| Mentha x piperita var. vulgaris | GB, VC5 South Somerset, Triscombe | John Patrick Micklethwait Brenan | | 23/9/1957 | K |
+ | Euphrasia anglica | GB, VC6 North Somerset | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 5/7/1944 | MANCH |
| Plantago lanceolata var. sphaerostachya | GB, VC6 North Somerset | John Patrick Micklethwait Brenan | | 11/7/1946 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC6 North Somerset, Bath,Twerton | John Patrick Micklethwait Brenan | | 25/8/1935 | K |
| Callitriche stagnalis | GB, VC6 North Somerset, Cheddar | John Patrick Micklethwait Brenan | | 8/9/1936 | K |
| Phalaris arundinacea | GB, VC6 North Somerset, Cheddar | John Patrick Micklethwait Brenan | | 8/7/1944 | K |
| Phalaris arundinacea | GB, VC6 North Somerset, Cheddar | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 8/7/1944 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC6 North Somerset, Croscombe | John Patrick Micklethwait Brenan | | 15/10/1944 | K |
| Mentha spicata x suaveolens = M. x villosa var. alopecuroides | GB, VC6 North Somerset, Bowlish GB, VC6 North Somerset, Croscombe | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 15/10/1944 | K |
| Draba muralis | GB, VC6 North Somerset, Easton-in-Gordano | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 20/4/1935 | SLBI |
| Mentha spicata x suaveolens = M. x villosa | GB, VC6 North Somerset, Publow | John Patrick Micklethwait Brenan | | 3/9/1935 | K |
+ | Peucedanum palustre | GB, VC6 North Somerset, Shapwick | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 4/8/1944 | MANCH |
| Potamogeton polygonifolius | GB, VC6 North Somerset, Shapwick | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 4/7/1944 | MANCH |
| Blysmus compressus | GB, VC6 North Somerset, Shepton Mallet | John Patrick Micklethwait Brenan Richard Alexander Fraser Brenan | | 12/6/1969 | K |
| Dactylis glomerata | GB, VC6 North Somerset, Shepton Mallet | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 9/7/1944 | K |
| Dactylis glomerata | GB, VC6 North Somerset, Shepton Mallet | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 6/9/1942 | K |
| Groenlandia densa | GB, VC6 North Somerset, Shepton Mallet | John Patrick Micklethwait Brenan | | 12/6/1949 | K |
| Plantago lanceolata var. sphaerostachya | GB, VC6 North Somerset, Shipham Bottom | John Patrick Micklethwait Brenan | John Patrick Micklethwait Brenan | 11/7/1946 | K |
| Plantago coronopus | GB, VC6 North Somerset, Steep Holm | Cecil Ivry Sandwith John Patrick Micklethwait Brenan | | 30/5/1937 | K |
| Aconitum napellus | GB, VC6 North Somerset, Stoke Lane | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 5/7/1944 | MANCH |
| Aconitum napellus | GB, VC6 North Somerset, Stoke Lane | John Norton Mills John Patrick Micklethwait Brenan | John Norton Mills | 5/7/1944 | MANCH |
| Carex montana | GB, VC6 North Somerset, Velvet Bottom | John Patrick Micklethwait Brenan | John Norton Mills | 23/4/1943 | MANCH |
| Mentha spicata | GB, VC6 North Somerset, Weston | John Patrick Micklethwait Brenan | | 4/9/1936 | K |