Asplenium obovatum subsp. lanceolatum - Lanceolate Spleenwort
A Nationally Scarce fern, Lanceolate Spleenwort is found in cliff-top rock crevices, on hedges and walls close to the sea, as well as on old Cornish Hedges inland. Along these hedgebanks it is most easily found early in the spring before more vigorous species have obscured it. Although Black Spleenwort may be found in the same habitats it is very rare to find both species growing side by side. Good populations occur in West Penwith in the lanes around Zennor (SW43P) and on the hedgebanks near Lanyon Quoit (SW43H). Other good sites are on Tintagel Island (SX08P) and down a country lane near Upton Cross (SX27W). It grows well on the Isles of Scilly.
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French, C.N., Murphy, R.J. & Atkinson, M. 1999. Flora of Cornwall. Wheal Seton Press, Camborne.