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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Anderson, R. & Christie, S. | 1991 | New plant records for N. Antrim and N. Londonderry | Journal | Ir. Nat. J. | Details... |
| Angus, J.G. | 1991 | The Presidential Excursion: North Down coastal path | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Anon. | 1991 | Death knell for bluebells? Global warming and British plants | Published | Plantlife | Details... |
| Baker, J.D. & Cruden, R.W. | 1991 | Thrips-mediated self-pollination of two facultatively xenopgamous wetland species | Journal | Amer. J. Bot. | Details... |
| Blattner, F. & Kadereit, J.W. | 1991 | Patterns of seed dispersal in two species of Papaver L. under near-natural conditions | Journal | Flora | Details... |
| Brodie, J. | 1991 | Some observations on the flora of Clare Island, western Ireland | Journal | Ir. Nat. J. | Details... |
| Brown, D.M. | 1991 | Studies on Pinus sylvestris L. from Garry Bog, Co. Antrim | M.Sc. Thesis | | Details... |
| Bulter, K.P. | 1991 | Field guide to orchids of Britain and Europe | Book | | Details... |
| Clabby, G. & Osborne, B.A. | 1991 | The occurrence of Mycelis muralis (L.) Dumort in woodland in Ireland | Journal | Ir. Nat. J. | Details... |
| Davies, M.S. & Long, G.L. | 1991 | Performance of two contrasting morphs of Brachypodium sylvaticum transplanted into shaded and unshaded sites | Journal | J. Ecol. | Details... |
| Doody, J.P. | 1991 | Sand dune inventory of Europe | Report | | Details... |
| Downey, M. | 1991 | Groenlandia densa (L.) Fourr. in the Royal Canal, Dublin | Journal | Ir. Nat. J. | Details... |
| Dyos, H., Proctor, J. & Sheehy Skeffington, M.J. | 1991 | Notes on the vegetation of the Dawros and other ultrabasic rock outcrops in Connemara | Journal | Ir. Nat. J. | Details... |
| Ebling, F.J. | 1991 | The exploration of the rapids | Chapter | | Details... |
| Fuller, I.A., Telfer, T.C., Moore, C.G. & Wilkinson, M. | 1991 | The use of multivariate analytical techniques in conservation assessment of rocky seashores | Journal | Aquatic Cons.: Marine and Freshwater Ecosystems | Details... |
| Gadella, T.W.J. | 1991 | Variation, hybridization and reproductive biology of Hieracium pilosella L. | Journal | Proc. Koninkl. Nederl. Akad. Wetensch. | Details... |
| Hackney, P. | 1991 | Sea couch Elymus pycnanthus (Gordon) Melderis in Cos. Down and Antrim (H38,39) | Journal | Ir. Nat. J. | Details... |
| Hensey, M.P. | 1991 | Environmental monitoring for fish farms in Ireland | Chapter | | Details... |
| Hill, A. | 1991 | Excursion: Tillysburn | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hill, M.O., Preston, C.D. & Smith, A.J.E. | 1991 | Liverworts (Hepaticae and Anthocerotae) | Book | | Details... |
5058 references found.