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Photo
by Dr M Lueth ©.
*1: Porthmeor, 1924, PWR (NMW 76.66.8430), redet. DTH 2004.
+1: on gravelly soil beside small flush low on
N.-facing sea-cliff, Porthmeor Cove, SW425374, 7 May 1996, DTH
96-124 (BBSUK,
DTH) (Rothero 2006: 27).
*2: On soil among rocks at base of flushed E.-facing
bank near river, unshaded, ca 15 m alt., W. bank
of River Camel at Polbrock, SX06, 2003, DTH 03-23 (BBSUK) (Rothero
2004a: 36).
These are the only records from Cornwall
confirmed using the gametophytic characters described by
Werner (2002), although the reliability of these is
questionable. Perhaps overlooked in the past on the assumption
that only fertile plants could be identified (see notes under
D. pellucidum s. l .).
In vc1 at Porthmeor on vertical to horizontal
granitic rocks and gritty soil low on N.-facing sea-cliff
(where otherwise unshaded) and in 'ravine' formed by stream
just inland of the cliffs (where sheltered and partly shaded).
In vc2 patch on soil among rocks at base of flushed, unshaded,
E.-facing bank near river, below damp basic slaty
rocks.
A specimen from 'Beside road outside Redruth', 3
April 1959, leg. L.B.C. Trotter (NMW 64.555.959) is
probably this species but it has not been mapped because the
locality seems rather vague and the plants are atypical
(leaves only weakly toothed, leaf margin strongly recurved,
lamina smooth).
Not seen c.fr.
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