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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Page, C.N. & Barker, M.A. | 1985 | Ecology and geography of hybridization in British and Irish horsetails | Journal | Proc. Roy. Soc. Edinb. | Details... |
| Pakeman, R.J., Marrs, R.H., Howard, D.C. & Barr, C.J. | 1994 | Predicting the effects of climate and land-use change on the spread of bracken | Chapter | | Details... |
| Palmer, J.A.J. | 1928 | A new station for parsley fern in Wicklow | Journal | Ir. Nat. J. | Details... |
| Palmer, J.A.J. | 1928 | Asplenium lanceolatum on the coast of Wicklow | Journal | Ir. Nat. J. | Details... |
| Parker, R.E. | 1967 | Lycopodium inundatum in north-east Ireland | Journal | Ir. Nat. J. | Details... |
| Phillips, J. | 1990 | Excursion: Conlig | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W. | 1879 | Ferns and fern collecting | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1887 | On the reproduction of ferns, specially on the observed phenomenon called apospory, with some remarks on hybridisation | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1890 | A gossip about British ferns and their varieties, with notices of local finds: with illustrations | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1900 | British ferns | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1901 | My hobby about ferns and its results: personal reminiscences | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1904 | Varieties in British ferns | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1906 | Reproduction in ferns | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1907 | A talk about some beautiful varieties of ferns | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1910 | The ferns of Ulster: how to grow, and where to find them | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. | 1910 | The crossing of ferns. Reminiscences of some pioneers of the cult | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Phillips, W.H. & Praeger, R.Ll. | 1887 | The Ferns of Ulster | Appendix | Proc. Belf. Nat. Fld. Club | Details... |
| Pogorelova, T.D. & Rabotnov, T.A. | 1978 | Experience in determining the age of Dryopteris filix-mas specimens | Journal | Rastit. Resur. | Details... |
| Praeger, R.Ll. | 1894 | Equisetum wilsoni | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1896 | Flowering plants and vascular cryptograms | Journal | Ir. Nat. | Details... |
304 references found.