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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Mahony, A. | 1981 | Review: 'Sedges of the British Isles' BSBI handbook no.1. 2nd edition. eds Jermy, Chater & David | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Pack-Beresford, D.R. | 1908 | Eluma purpurascens: a woodlouse new to the British Isles | Journal | Ir. Nat. | Details... |
| Panigrahi, G. | 1955 | Caltha in the British Flora | Chapter | | Details... |
| Parnell, J.A.N. | 1985 | Biological Flora of the British Isles no. 157. Jasione montana L. | Journal | J. Ecol. | Details... |
| Partridge, J.W. | 2001 | Biological Flora of the British Isles no. 218. Persicaria amphibia (L.) Gray (Polygonum amphibium L.) | Journal | J. Ecol. | Details... |
| Pate, J.S. | 1961 | Perennial nodules on native legumes in the British Isles | Journal | Nature | Details... |
| Paton, J.A. | 1977 | Plagiochila killarniensis Pears. in the British Isles | Journal | J. Bryol. | Details... |
| Paton, J.A. | 1979 | Plagiochila britannica, a new species in the British Isles | Journal | J. Bryol. | Details... |
| Perrins, J., Fitter, A. & Williamson, M. | 1993 | Population biology and rates of invasion of three introduced Impatiens species in the British Isles | Journal | J. Biogeog. | Details... |
| Peterken, G.F. & Lloyd, P.S. | 1967 | Biological Flora of the British Isles no. 108. Ilex aquifolium L. | Journal | J. Ecol. | Details... |
| Phillips, R.A. & Watson, H. | 1930 | Milax gracilis (Leydig) in the British Isles | Journal | J. Conch. (Lond.) | Details... |
| Picton, B.E. | 1980 | A new species of Coryphella (Gastropoda: Opisthobranchia) from the British Isles | Journal | Ir. Nat. J. | Details... |
| Pope, R.D. | 1973 | The species of Scymnus (s.str.), Scymnus (Pullus) and Nephus (Coleoptera: Coccinellidae) occurring in the British Isles | Journal | Ent. Monthly Mag. | Details... |
| Praeger, R.Ll. | 1895 | Review: 'Botanical exchange club of the British Isles: report for 1894' & 'Eleventh annual report of the Watson Botanical Exchange Club 1894-95' | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1903 | Review: 'A list, with descriptive notes, of all the species of hepatics hitherto found in the British Islands | Journal | Ir. Nat. | Details... |
| Preston, C.D. | 1988 | The spread of Epilobium ciliatum Raf. in the British Isles | Journal | Watsonia | Details... |
| Ragge, D.R. | 1965 | Grasshoppers, crickets and cockroaches of the British Isles | Book | | Details... |
| Ramsbottom, W.H.C., Calver, M.A., Eagar, R.M.C., Hodson, F., Holliday, D.W., Stubblefield, C.J. and Wilson, R.B. | 1978 | A correlation of Silesian rocks in the British Isles | Journal | Geol. Soc. Lond. Spec. Rep. | Details... |
| Rawson, P.F., Curry, D., Dilley, F.C., Hancock, J.M., Kennedy, W.J., Neale, J.W., Wood, C.J. & Worssam, B.C. | 1978 | A correlation of Cretaceous rocks in the British Isles | Journal | Geol. Soc. Lond. Spec. Rep. | Details... |
| Reeve, L. | 1863 | The land and freshwater mollusks of the British Isles | Book | | Details... |
312 references found.