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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Praeger, R.Ll. | 1893 | Rare plants found in the district during 1891 and 1892 | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Praeger, R.Ll. | 1898 | Local botanical notes, 1895-97 | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Praeger, R.Ll. | 1900 | New stations for rare plants | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1901 | Pyrola secunda refound in Ireland | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1904 | Additions to 'Irish Topographical Botany' in 1903 | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1906 | Additions to 'Irish Topographical Botany' | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1909 | Asparagus officinalis in Co. Londonderry | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1913 | Additions to 'Irish Topographical Botany' in 1908-1912 | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1917 | Magilligan plants | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1918 | Natural History Societies in Derry and Cork | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1923 | Erica stricta in Antrim and Derry | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1936 | New edition of the 'Flora of the North-East of Ireland | Journal | Ir. Nat. J. | Details... |
| Praeger, R.Ll. | 1937 | Scirpus nanus in the Bann Estuary | Journal | Ir. Nat. J. | Details... |
| Praeger, R.Ll. & Megaw, W.R. | 1938 | A Flora of the north-east of Ireland | Book | | Details... |
| Preston, S.J., Wilson, C., Jennings, S., Provan, J. & McDonald, R.A. | 2007 | The status of juniper Juniperus communis L. in Northern Ireland in 2005 | Journal | Ir. Nat. J. | Details... |
| Riley, D.H. | 1984 | Grazing and changes in a dune grassland in Co. Londonderry, 1969-1980 | Journal | Ir. Nat. J. | Details... |
| Riley, D.H. | 1993 | Further changes in a dune grassland in Co. Londonderry, 1980-1990 | Journal | Ir. Nat. J. | Details... |
| Rippey, I. | 1985 | Andromeda polifolia in Cos. Antrim and Londonderry | Published | | Details... |
| Rippey, I. | 1985 | Lepidoptera in Cos. Down, Antrim and Londonderry (and other notable observations in Northern Ireland) in 1984 | Unpublished | | Details... |
| Roberts, J.C. | 1972 | A sand and silt boulder-bed at Moys, Co. Londonderry | Journal | Ir. Nat. J. | Details... |
367 references found.