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At base of Acaena on soil/peat, Alt. 180 m. Valley south of station, east of Mont Branca, Possession Island. Crozet

In stream, Alt. 400 ft. West-facing scree slopes to west of Mount Krokisius. South Georgia

Submerged in pond in Rostkovia flush, Alt. c. 50 ft. South of Leith Whaling Station, Stromness Bay. South Georgia

Abundant in Rostkovia flush, Alt. 350 ft. Near head of south side of valley immediately north of Sorling Valley, Barff Peninsula. South Georgia

Forming patches on stones at edge of stream, Alt. 25 ft. Tonsberg Point, near Husvik, Stromness Bay. South Georgia

Dry nitrogenous rocks by shore, facing east, Alt. 3 m. c. 2 km. south-west of Nameless Point, Right Whale Bay. South Georgia

On fine silty soil. Alt. 200 m. Upper Husdal. South Georgia

On scoria and lava slopes. Alt. 350 m. Upper Van Den Boogaard Valley, Marion Island. Prince Edward Islands

Level moraine, Alt. 152 m. 2 Km. south-west of Endurance Glacier, Elephant Island. South Shetland Islands

Exposed rocks facing west, Alt. 600 ft. Moraine by rock buttress at SE side of Sunshine Glacier, Coronation Island. South Orkney Islands

Mixture of broken bedrock and stones, facing north-east, also found on north-facing crest, Alt. 650 ft. Northern tip of the ridge descending from spot 835. West of Hope Bay. Antarctic Peninsula

Rocky moraine, Alt. 200 m. 'Skua Point', 1 km east of Metchnikoff Point, Brabant Island. Antarctic Peninsula

Moist gravelly margin of melt stream. Alt. 70m. Valley N of St Martha Cove, James Ross Island. Antarctic Peninsula

On scree slope in dry water channel. Alt. c. 515 m. Upper Flatiron Valley. Antarctic Peninsula, Alexander Island

Dry boulders facing north, Alt. 150 ft. North side of Observation Bluff, Signy Island. South Orkney Islands

On bird perching stones, Alt. 25 ft. Drying Point, Signy Island. South Orkney Islands

Sheltered north-facing crevice, Alt. 50 ft. Slightly inland from Knife Point, Borge Bay, Signy Island. South Orkney Islands

Just above high tide level, Alt. 2 m. South tip of Edwards Point, Robert Island. South Shetland Islands

Growing on old moss humus along lines of weakness on damp rocks, and between small stones, on steep north-facing scree slope, Alt. c. 150 ft. near Scar Hills, south, northern side of Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

On upper surface and sides of larger rocks, Alt. c. 400 ft. at summit of slope above small penguin rookery at western end of Lake Boeckella, Trinity Peninsula. Antarctic Peninsula, Trinity Peninsula, East Coast

Small damp rocks between boulders, on steep north-facing scree slope, Alt. c. 150 ft. near Scar Hills, south, northern side of Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

South side of 15 ft. boulder in damp crevice, on steep north-facing scree slope, Alt. c. 80 ft. near Scar Hills, south, northern side of Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

On moss (Sarconeurum glaciale) on rock outcrop with skua nest/perch. Alt. 10 m. SE coast Ganymede Hts, 100m from King George VI Ice Shelf/Jupiter Glacier confluence. Antarctic Peninsula, Alexander Island

Dry, fine alluvial substrate on ledge near meltstreams. Alt.183.5m. Upper Moutonnee Valley 500m from glacier. Antarctic Peninsula, Alexander Island

Dry rock face, Alt. 25 m. Andree Island, Charlotte Bay. Antarctic Peninsula, Danco Coast

On gravel and shale on damp mineral soil. Alt. 50 m. Banks of meltwater stream flowing into Stillwell Lake, Stillwell Hills, Kemp Land. Antarctica, Enderby Sector

On moss (Sarconeurum glaciale). Gravelly granitic soil on edge of late snow bed. 300-500 m further up moraine than RILS 9654. Upper moraine of Tinker Glacier-Burns Glacier, Victoria Land. Antarctica, Ross Sector

Rock ledges with Xanthoria candelaria, facing west, Alt. 50 ft. Knife Point, Signy Island. South Orkney Islands

On moss (Tortula saxicola and other calcicoles) on marble soil. Alt. 25m. S side of stream flowing out of Tranquil Lake, Signy Island. South Orkney Islands

On soil. Alt. 5-15m. W end of N side of Camp point, Marguerite Bay. Antarctic Peninsula

On dry moss (Hypnum sp.) Alt. 150m. Fortress Hill, James Ross Island. Antarctic Peninsula

Dry gravelly soil. Alt. 4 m. Grytviken football pitch. South Georgia

On stones and mud. Top of plateau with large volcanic boulders. Alt. 400m. Lachman Crags, James Ross Island. Antarctic Peninsula

Melt pool, Alt. 5 m. Small Islet to north of Kirkwood Islands, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

In Festuca association, Alt. c. 10 ft. Hestesletten, west shore of Moraine Fjord, Cumberland East Bay. South Georgia

Alt. c. 10 ft. Hestesletten, Cumberland East Bay. South Georgia

In Festuca grassland, Alt. 400 ft. Bore Valley. South Georgia

Amongst Brachythecium austro-salebrosum on moist rock ledge on cliff near shore.Alt. 5m. S side of Foca Cove, Signy Island. South Orkney Islands

Deep, damp, rock crevices, Alt. 250 ft. Above Paal Harbour, Signy Island. South Orkney Islands

Damp, shaded crevice in amphibolite rock outcrop. Alt. 25m. Knife Point, Signy Island. South Orkney Islands

Talud al borde del rio en bosque denso de Nothofagus pumilio. Provincia Santa Cruz, Depto Guer Aike. El Turbio, Loma Raspentek, 5km NW de la Estancia Stag River. South America, Argentina

Top of scree, North side of Leith Harbour, Stromness Bay. South Georgia

Moist rock crevices, Alt. 20 ft. Irizar Island, Argentine Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Dry crevices, Alt. 200 ft. Largest of the Berthelot Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Rock crevices, Alt. 50 ft. East side of snout of Nordenskjold Glacier, Cumberland East Bay. South Georgia

Dry sheltered ledge, Alt. 15 ft. East end of Meek Channel, Galindez Island, Argentine Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Edge of wet runnel, Alt. c. 100 ft. Bank behind base hut, Signy Island. South Orkney Islands

Prince Olav Harbour. South Georgia

North-west facing spur, Alt. 2500 ft. Southern spur of Three Brothers, junction of Christensen and Kjerulf Glaciers, Allerdyce Range. South Georgia

On soil around the bases of trees in scrub Nothofagus forest. Alt. c. 150 m. South-east facing slopes of Cerro Sol, Depto. Ultima Esperanza, Provincia Magallanes. South America, Chile