Showing posts with label Orthothecium. Show all posts
Showing posts with label Orthothecium. Show all posts

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-moss) were 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

Thursday, 15 December 2016

Nedd Fechan in Pictures 3

Just a few more images of some things seen yesterday in the extraordinary karstic landscape of the Upper Nedd Fechan Valley between Dyffryn Nedd and Pwll-du:

Orthothecium intricatum

Seligera sp. on vertical limestone with copious, base-rich seepage

Brachythecium glareosum

Sticta limbata on Ash trunk

Sticta limbata

Pseudoclitocybe cyathiformis (The Goblet)

Nedd-fechan in pictures 2

Sam introduced Charles and myself to the very easily overlooked Platydictya jungermannioides (photos 1-2), growing in much the same habitat as Orthothecium intricatum (photo 3), both characteristically occupy humid, shady crevices on limestone. Further downstream there was a small colony of another equally unobtrusive pleurocarp, Amblystegium confervoides (photos 4-5), found growing on a stone embedded in the woodland floor.

All the above were found in what was a reasonably open section of ravine, but with damp vertical cliffs on both sides proving to be productive, the cliff on the right hand bank being higher up the slope. I think Charles is photographing Rhynchostegiella teneriffae in the first pic, the lower photo shows Sam inspecting an emergence hole on the r.h.b. with a decent flow of water surfacing.