Monday 29 October 2018

Rigid Bog-moss on Fairwood Common


An M5-M21b mosaic on Fairwood Common held some good patches of Sphagnum teres (above & first below), which were frequent throughout a 1500sqm area. Carex rostrata was a constant in the areas where S. teres was prominent, the other main species of Sphagnum present being palustre (lots amongst marginal scrub - bottom photo), subnitens and papillosum. Plagiomnium ellipticum (photo below) was also found in the same area growing in quite luxuriant wefts along with P. undulatum and between mini-mounds of Campylium stellatum.  A little Cirriphyllum piliferum was unexpected and both ‘normal’ and ‘giant’ forms of Aneura pinguis were present. Some nice quality vascular plants were also present including Comarum palustre, Genista anglica, Menyanthes trifoliata, Narthecium ossifragum, Succisa pratensis and Vaccinium oxycoccos, though only the latter two species in good quantity.



Saturday 27 October 2018

Puzzling Philonotis

I collected this somewhat nondescript Philonotis earlier in the week, during a visit to Pengwern Common, hoping that it might be caespitosa. Unfortunately it did not key out cleanly as anything, though the highly unlikely P. marchica came very close. So another one I'd welcome a second opinion of in the first instance. The presence of obvious distal papillae on the outer part of the leaf is more a feature of arnellii, though the leaves are not narrow or attenuated enough for that species. Perhaps more significant was the presence of axillary ovate bulbils on many shoots, this being a feature of marchica, with arnellii producing flagelliform axillary bulbils.

On a separate note it was good to record Leucobryum glaucum at several points across the site, this being a surprisingly localised species in Gower. I suspect it does not cope well with regular burning?

Saturday 13 October 2018

Holiday Bryophytes - lots of leskeas

Alpine habitat, La Tofane

We were in the Dolomites in July this year, our third visit to this fabulous mountain range in Northern Italy. Most of our attention was paid to the spectacular alpine flowering plants but we did note a few bryophytes.
 The subalpine forests have an extraordinary abundance of Rhytidiadelphus triquetrus and Hylocomium splendens (and lots of orchids, including Lady's Slipper) in stark contrast to our local, acidic Sitka forests with their abundant carpets of Rhytidiadelphus loreus

Rhytidiadephus triquetrus and Hylocomium splendens in spruce forest near Cortina

The geology is predominantly limestone and lots of typical calcicole bryophytes are represented plus some really nice mountain species that are rare in Britain. In the province of Belluno, between Cortina D'Ampezzo and the Falzarego Pass, some excellent trails took us above tree-line into alpine tundra where there were wallcreeper.  In the rocky tundra below La Tofane Ptychodium plicatum (Plaited Leskea) was growing with Saxifraga oppositifolia (Purple Saxifrage) on some sheltered limestone boulders. 

Ptychodium plicatum and Saxifraga oppositifolia, la Tofane

H and Mark on Wallcreeper twitch above Falzarego Pass

On a hike to the Rifugio Locatelli from the famous Tre Cime di Lavaredo we encountered small parties of snow finches flitting about rocks covered with Pseudoleskea incurvata.  Later, in the mountains above Selva in the Val Gardena we found some Pseudoleskea patens (Patent Leskea) which gave us a good opportunity to compare these very similar species. In the end we had to bring samples home to examine the shape of the mid-leaf cells to confirm their identities.

Pseudoleskea incurvata with Salix herbacea (Dwarf Willow) near Rifugio Lavaredo

Pseudoleskea patens, Selva

The short walk to Baita Monzoni in the Val San Nicolo near Pozza di Fassa follows a forest road through a moist, mossy subalpine forest. Bartramia halleriana (Haller's Apple-moss) and Campyllophyllum halleri (Haller's Feather-mosswere on the base rich rocks here - the latter is a Red DataBook moss in the UK. Nearby on a large limestone boulder at the side of the road we noted a large, striking mat of Pterigynandrum filiforme (Capillary Wing-moss). From Monzoni the trail climbs up, eventually, to the Pas de la Sele and allows access to an outstanding alpine flora which includes lots of saxifrages (e.g. the endemic Saxifraga depressa) and other nice things like Papaver rhaeticum (Alpine Poppy), Phyteuma sieberi (Sieber's Rampion), Primula glutinosa (Sticky Primrose) and Ranunculus glacialis (Glacier Crowfoot).

Bartramia halleriana near Baita Monzoni

Bartramia halleriana with capsules

Campylophyllum halleri near Baita Monzoni

Pterigynandrum filiforme on a boulder near Baita Monzoni

Pterigynandrum filiforme Baita Monzoni

On a trip to Sottogudo we walked along a narrow road through a spectacular gorge where  Orthothecium rufescens (Red Leskea) was hanging from dripping limestone outcrops. There were some nice clumps of Selaginella helvetica here too. 

Orthothecium rufescens, Sottogudo Gorge
Orthothecium rufescens, Sottogudo Gorge

Selaginella helvetica, Sottogudo Gorge

Although the landscape of the Dolomites is dominated by limestone there are some extensive cliffs and outcrops of more acidic igneous rock which support a different flora, e.g. on and around Forcia Neigra near Alba. Our attention was stolen by some nice cushions of Eritrichium nanum (King-or-the-Alps) but we also noticed some conspicuous dark cushions of Grimmia montana (Sun Grimmia).

Grimmia montana, Forcia Neigra