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[Riccia
ciliata Hoffm. – Listed for W. Cornwall (vc1) by Ingham
(1913), but the record was treated as doubtful by Paton
(1965c, 1969: 690). Mrs Paton later (1980: 4-5) established
that the Cornish record is based on a minute specimen
(Quarry field near Penzance, 1861, WC, (E)) that has the
appearance of being a small portion probably detached from a
larger gathering. Furthermore, the specimen is actually of R. canescens Steph., a
species of very dry habitats that is uncommon in Europe and
unlikely to occur near Penzance, so the provenance of this
specimen is perhaps most likely to have become muddled in
Curnow's herbarium. Unfortunately the description and
illustration in Macvicar (1926) appear to have been based on
this specimen. As pointed out by Paton (1980: 5), the
unsatisfactory data preclude inclusion of R. ciliata or R. canescens on the
British list].
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