are the only species which occur on tree-fern stems, although in lighter forests in other parts of New Zealand H. rarum and H. flabellatum quite commonly adopt this station, and other epiphytic species also occasionally. 13. The fronds of many of the New Zealand species can recover after a considerable degree of drying and shrivelling. The observations of the present writer with regard to this phenomenon relate only to the larger epiphytic species of Hymenophyllum and to T. reniforme. The typically terrestrial species and the low epiphytes, and also the small species generally, rarely are found shrivelled. Certain larger epiphytic species possessing filiform stems—viz., H. rarum, H. flabellatum, H. Malingii—are probably the most rarely shrivelled of the epiphytes, all apparently possessing special modifications for resisting desiccation. H. villosum, can both withstand drying, and also recover from it when affected, to the greatest extent of all the New Zealand species. Literature Cited. 1. Armstrong, J. F., On some New Species of New Zealand Plants (H. Armstrongii), Trans. N.Z. Inst., vol. 4, p. 291, 1872. 2. Boodle, L. A., On the Anatomy of the Hymenophyllaceae, Ann. of Bot., vol. 14, pp. 455–96, 1900. 3. Bower, F. O., The Comparative Examination of the Meristems of Ferns as a Phylogenetic Study, Ann. of Bot., vol. 3, pp. 305–92 (cf. pp. 340–60), 1889. 4. — Studies in the Morphology of Spore-producing Members: No. IV, The Leptosporangiate Ferns, Phil. Trans. Roy. Soc., 192b, pp. 29–138 (cf. pp. 60–66), 1899. 5. Carse, H., The Ferns and Fern Allies of Mangonui County, Trans. N.Z. Inst., vol. 47, pp. 76–93, 1915. 6. Cheeseman, T. F., Manual of the New Zealand Flora; Wellington, N.Z., 1906. 7. — Illustrations of the New Zealand Flora; vol. 2; Wellington, N.Z., 1914. 8. Cockayne, L., A Botanical Excursion during Midwinter to the Southern Islands of New Zealand, Trans. N.Z. Inst., vol. 36, pp. 225–333, 1904. 9. — A Some Noteworthy New Zealand Ferns, The Plant World, vol. 15, No. 3, pp. 49–59, 1912. 10. Curtis, K. M., The Anatomy of the Six Epiphytic Species of the New Zealand Orchidaceae, Ann. of Bot., vol. 31, No. 121, pp. 133–49, pls. 7–12, 1917. 11. Field, H. C., The Ferns of New Zealand; Wanganui, N.Z., 1890. 12. Giesenhagen, C., Die Hymenophyllaceen, Flora, Bd. 73, pp. 411–64, pls. 14–17, 1890. 13. Hamilton, A., List of Plants collected in the District of Okarito, Westland, Trans. N.Z. Inst., vol. 11, pp. 435–38, 1879. 14. Hooker, J. D., Flora Antarctica, vol. 1 (Campbell and Auckland Islands); London, 1844. 15. — Flora Novae Zelandiae, vol. 2; London, 1855. 16. Kirk, T., Description of a New Species of Hymenophyllum (H. atrovirens), Trans. N.Z. Inst., vol. 10, p. 394, 1878. 17. — On Hymenophyllum villosum, ibid., p. 395, 1878. 18. — Recent Additions to the Flora of New Zealand (H. Armstrongii), ibid, Appendix, p. xliii (see also pp. 395 and 532), 1878. 19. — Description of a New Species of Hymenophyllum (H. rufescens), ibid., vol. 11, pp. 457–58, 1879. 20. Maiden, J. H., and Betche, Ernst, A Census of New South Wales Plants; Sydney, 1916. 21. Moore, C., Handbook of the Flora of New South Wales; Sydney, 1893. 22. N. Z. Scientific Expedition, The Subantarctic Islands of New Zealand (2 vols., pub. by Phil. Inst. of Canterbury); Wellington, 1909. 23. Oliver, W. R. B., The Vegetation and Flora of Lord Howe Island, Trans. N.Z. Inst., vol. 49, pp. 94–161, 1917. 24. Potts, T. H., Notes on Ferns, Trans. N.Z. Inst., vol. 10, pp. 358–62, 1878. 25. Rodway, L., The Tasmanian Flora; Hobart, 1903. 26. Shreve, Forrest, Studies on Jamaican Hymenophyllaceae, Bot. Gaz., vol. 51, pp. 184–209, 1911. 27. Townson, W., On the Vegetation of the Westport District (cf. T. humile and T. elongatum), Trans. N.Z. Inst., vol. 39, pp. 380–433, 1907.