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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Hollingsworth, P.M., Preston, C.D. & Gornall, R.J. | 1995 | Isozyme evidence for hybridization between Potamogeton natans and P. nodosus (Potamogetonaceae) in Britain | Journal | Bot. J. Linn. Soc. | Details... |
| Holm, L.G., Plunckett, D.L., Pancho, J.V. & Herberger, J.P. | 1977 | The world's worst weeds | Book | | Details... |
| Holmes, N.T.H. | 1979 | A guide to identification of Batrachium Ranunculus species of Britain | Published | | Details... |
| Holmes, N.T.H. | 1980 | Ranunculus penicillatus (Dumort.) Bab. in the British Isles | Journal | Watsonia | Details... |
| Holt, E.W.L. | 1905 | Note on the manurial value of the seaweed Cladophora rupestris | Journal | Ann. Rept. Fish., Ireland | Details... |
| Holyoak, D.T. | 2000 | New National and Regional Bryophyte Records. 2. Physcomitrium sphaericum in Ireland | Journal | J. Bryol. | Details... |
| Holyoak, D.T. | 2005 | Ajuga pyramidalis L. in W Donegal (H35) | Journal | Ir. Nat. J. | Details... |
| Holyoak, D.T. | 2005 | Spread of the alien plants Juncus planifolius R. Br. and Sisyrinchium californicum (Ker Gawl.) W.T. Aiton in Co. Galway | Journal | Ir. Nat. J. | Details... |
| Holyoak, D.T. | 2006 | Field meeting of the British Bryological Society in Co Fermanagh, Co Leitrim and Co Cavan, 2005 | Journal | Ir. Nat. J. | Details... |
| Hong, D.-Y. | 1991 | A biosystematic study on Ranunculus subgenus Batrachium in S Sweden | Journal | Nordic J. Bot. | Details... |
| Hood, S. | 1978 | The arts in prehistoric Greece | Book | | Details... |
| Hooker, J.D. | 1849 | The rhododendrons of Sikkim - Himalaya | Book | | Details... |
| Hopkins, W.G. | 1995 | Introduction to plant physiology | Book | | Details... |
| Horsman, F. | 1998 | Spiranthes romanzoffiana and the Greenland white-fronted goose | Journal | BSBI News | Details... |
| Horsman, F. | 2005 | New records for Spiranthes romanzoffiana Cham. in S Kerry (H1), W Cork (H3), W Galway (H16), E Mayo (H26) and W Mayo (H27) | Journal | Ir. Nat. J. | Details... |
| Horwood, A.R. | 1908 | The extinction of cryptogamic plants and the need for a lichen exchange club | Journal | Ir. Nat. | Details... |
| Horwood, A.R. | 1908 | The extinction of cryptogamic plants in Ireland | Journal | Ir. Nat. | Details... |
| Houston, J.D. | 1913 | Rare mosses in Counties Antrim and Derry | Journal | Ir. Nat. | Details... |
| Houston, J.D. | 1914 | Amblystegium kochii in Ireland | Journal | Ir. Nat. | Details... |
| Houston, J.D. | 1925 | Botanical records | Journal | Ir. Nat. J. | Details... |
5058 references found.