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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Hackney, P. | 1985 | Asplenium trichomanes L. subsp. trichomanes in the Mourne mountains (H38) | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1985 | Review: 'Flowering plants of Wales' by R.G. Ellis | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1986 | The midland hawthorn (Crataegus laevigata (Poir) DC) and the hybrid C. x media Bechst. in Ireland | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1987 | Excursion: Weekend around Carlingford Lough: Botanical Report | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hackney, P. | 1988 | Review: 'Flora of the Isle of Man' by D.E. Allen | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1988 | Juncus foliosus in two Northern Ireland counties | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1988 | Excursion: Botanical recording in the Dromore area | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hackney, P. | 1991 | Sea couch Elymus pycnanthus (Gordon) Melderis in Cos. Down and Antrim (H38,39) | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1992 | Stewart & Corry's Flora of the north-east of Ireland | Book | | Details... |
| Hackney, P. | 1994 | Report on the fields belonging to Clover Vale Farm, Island Magee (proposed site for Converter Station at Northern Ireland end of the cross-channel power link to Scotland) | Report | | Details... |
| Hackney, P. | 1994 | Notes on River Foyle in Co. Tyrone | Unpublished | | Details... |
| Hackney, P. | 1995 | The flora of the North-east of Ireland - supplementary notes | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Hackney, P. | 1997 | Excursion (1996): Annadale | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hackney, P. | 1997 | Excursion: Kinbane Head and Portnakillew | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hackney, P. | 1997 | Review: 'Alien grasses of the British Isles' by T.B. Ryves, E.J. Clement and M.C. Foster | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Hackney, P. | 1998 | Monotropa hypopitys new to Co. Antrim (H39) | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1998 | Review: 'Flora of Great Britain and Ireland Volume 5. Butomaceace to Orchidaceae' by P. Sell and G. Murrell | Journal | Ir. Nat. J. | Details... |
| Hackney, P. | 1998 | Review: 'Urban Flora of Belfast' by S. Beesley & J. Wilde | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Hackney, P. | 2001 | Excursion: Survey of Clandeboye Estate | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hackney, P. | 2004 | Book review: 'Catalogue of the hawkweeds of Britain and Ireland in the Herbarium of the Liverpool Museum' compiled by K. Corrie | Journal | Ir. Nat. J. | Details... |
5058 references found.