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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Ledsham, D. | 1989 | Excursion: Garron Plateau | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lockhart, N.D. | 1989 | Three new localities for Saxifraga hirculus L. | Journal | Ir. Nat. J. | Details... |
| Lockhart, N.D., O'Connell, M., Sheehy Skeffington, M.J. & Van Doorslaer, L. | 1989 | Scraw (Schwingmoor) plant communities at Loch an Chorcail, Carna, Co. Galway | Journal | Ir. Nat. J. | Details... |
| Lum, C. & Maze, J. | 1989 | A multivariate analysis of the trichomes of Hedera L. | Journal | Watsonia | Details... |
| Mathew, B. | 1989 | Hellebores | Book | | Details... |
| Maxwell, R. | 1989 | Review: 'The European Garden Flora I' eds. Walters et al. | Journal | Ir. Nat. J. | Details... |
| Morales, H. | 1989 | Abortions in a dairy in the VII region of Chile attributed to the consumption of creeping buttercup (Ranunculus repens L) | Journal | Arch. Med. Vet. | Details... |
| Morton, O. & Chamberlain, Y.M. | 1989 | Further records of encrusting coralline algae on the north-east coast of Ireland | Journal | Ir. Nat. J. | Details... |
| Neenan, M. & Kennedy, T.F. | 1989 | Cryptorhynchus lapathi (L.), a potential pest of willow plantations | Journal | Ir. Nat. J. | Details... |
| O'Mahony, A. | 1989 | Carex divulsa Stokes x C. muricata L. occurring as a spontaneous garden hybrid and wild plant in Cork, new to Ireland | Journal | Ir. Nat. J. | Details... |
| O'Mongain, E. | 1989 | Aerial remote sensing for temperature and chlorophyll determination | Chapter | | Details... |
| O'Sullivan, G. & Gillooly, M. | 1989 | Lough Beltra 1987. Proceedings of the 4th Annual Lough Beltra Workshop, Dublin, 23rd March 1988 | Book | | Details... |
| Pellmyr, O. | 1989 | The cost of mutualism: interactions between Trollius europaeus and its pollinating parasites | Journal | Oecologia | Details... |
| Raine, R. | 1989 | Phytoplankton productivity around the Irish coast | Chapter | | Details... |
| Reilly, P. | 1989 | Some new county records and other plants of interest found in Cos. Longford (H24) and Cavan (H30) | Journal | Ir. Nat. J. | Details... |
| Reynolds, S.C.P. | 1989 | Spergularia marina (L.) Griseb. x S. rupicola Lebel. ex le Jolis, a hybrid new to Ireland | Journal | Ir. Nat. J. | Details... |
| Reynolds, S.C.P. | 1989 | Plant records from Co. Limerick (H8) in 1988 | Journal | Ir. Nat. J. | Details... |
| Rich, T.C.G. | 1989 | Thlaspi alliaceum L. in Ireland: a retraction | Journal | Ir. Nat. J. | Details... |
| Rippey, I. | 1989 | Golden samphire (Inula crithmoides L.) in Co. Louth (H31) | Journal | Ir. Nat. J. | Details... |
| Rippey, I. | 1989 | Excursion: South Down | Journal | Proc. Belf. Nat. Fld. Club | Details... |
5058 references found.