BRYOPHYTES IN SUFFOLK 2012
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BRYOPHYTES IN SUFFOLK 2012
R. J. FISK It is always exciting to find something new in the county and particularly so if it is a new personal record. One such has come about as a result of one of the name changes that have plagued naturalists in recent years. In the Flora of Suffolk (Sanford & Fisk, 2010) I mentioned a record of the moss Tortula subulata var. angustata that had been found at Shottisham in 1981. This was an ill defined variety apparently having no special characters and I had been unable to detect it in any of the plants of T. subulata that I found in Suffolk. Recently however, Spanish bryologists renamed it T. schimperi on the basis of a strong bistratose leaf border. British bryologists, myself included, seemed to be slow to pick up on this and it was not until it was found in Huntingdon last year that I and other local bryologists checked our herbaria and discovered that we had been finding all along. Eastern England would appear to be the stronghold of this ‘new’ species in Britain. Having looked at the specimens in my herbarium, I then went on a search for it in the field, both to sites where I had recently recorded T. subulata and other suitable habitats. In Suffolk, T. schimperi outnumbers T. subulata by a factor of three to one with 19 and eight confirmed records respectively. One genuinely new species to the county is Plagiothecium cavifolium that I found in Stanstead Great Wood in April. Smith (2004) and Hill, Preston & Smith (1994) state that it is a plant of moist, basic mountain rock ledges, but it was found in Norfolk a few years ago and has also been found in Cornwall. It also occurs in the Netherlands, hardly a mountainous country, so it could be a rare, but native, part of the East Anglian bryophyte flora. In Suffolk, with its dry climate, many small liverworts find survival a challenge. Even where there is moisture, survival is uncertain. In Tunstall Forest, the damp forest ride where I found Fossombronia incurva in 2007 has become completely overgrown with Juncus sp. and I have been unable to find the Fossombronia there since 2010. At a similar site in Dunwich Forest, Lophozia excisa occurred at one of the three sites from which it was known in Suffolk. It has been completely obliterated by the wheels of vehicles clearing trees. It is however still doing well in a small pit on Dunwich Heath. The tiny liverwort Cololejeuna minutissima seems to be established in the Norman Gwatkin Nature Reserve at Henham, I recently found it there for the fourth time since 1990, each time on a different tree. It is however still very scarce in the rest of the county despite being a species that is spreading nationally. Other records of interest during 2012 are listed below. Liverworts: Fossombronia pusilla Frullania tamarisci
Bare soil on a forest ride, Stanstead Great Wood, Stanstead. TL84P, 30 October. Amongst stones on a vegetated shingle ridge, Orfordness. TM44D, 15 May. The first record from VC25 and the first recent record from Suffolk as a whole.
Trans. Suffolk Nat. Soc. 49 (2013)