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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Lett, H.W. | 1892 | Hypnum filicinum var. vallisclansae Brid. in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1893 | Sphagnum austini (Sull.) in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1894 | A moss (Hypnum confervoides Brid.) new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1895 | Riccia glaucescens in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1900 | Sphagnum medium, Limpr., in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1901 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1902 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1903 | Riccia glaucescens Carr. in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1904 | A new hepatic | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1905 | Notes on some hepatics of Ulster | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1907 | Mosses in Ireland - a correction | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1908 | Mosses of Co. Dublin | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1908 | Ditrichum tortile (Schrad.) in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1909 | A new Irish moss | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1910 | Irish Field Club Union: Rosapenna Conference. Mosses and hepatics | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1911 | Some differences between mosses and hepatics | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1913 | Notes on the flora of the Saltees 2. Mosses and hepatics | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1913 | Interesting hepatics from Co Kerry | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1914 | Musci | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1915 | Census Report on mosses of Ireland | Journal | Proc. Roy. Ir. Acad. | Details... |
432 references found.