Hymenophyllum tunbrigense - Tunbridge Filmy-fern
Tunbridge Filmy-fern grows on dripping rock faces and crevices in shade, sometimes forming luxuriant growth, as on the granite boulders by Golitha Falls (SX26J, 1986, G.E.Castle). It is a feature of many of the tors on Bodmin Moor, such as The Cheesewring (SX27L, 1980, B.Boothby), but there is some doubt as to the authenticity of the records from the tors of West Penwith. Rarely it may be found growing as an epiphyte on trees in situations where humidity is high, as in Kennall Vale (SW73N, 1980s, K.L.Spurgin), below Penisker Farm, near St. Austell (SW95X, 1998, J.Humphries) and in the valley of the De Lank River (SX17C, 1995, A.Atkinson). Other sites include Luxulyan valley (SX05N, 1998, I.J.Bennallick), Cabilla Wood (SX16P, 1988, R.J.Murphy), De Lank Quarries (SX17C, 1988, M.Atkinson), Peter's Wood (SX19A, 1988, F.Rose), North Hill Wood (SX05T, 1987, S.M.Hocking), Rough Tor (SX18K, 1996, M.Atkinson) and Kilmar Tor (SX27M, 1999, I.J.Bennallick).
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French, C.N., Murphy, R.J. & Atkinson, M. 1999. Flora of Cornwall. Wheal Seton Press, Camborne.