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In abundance along a south-west-facing crack, shelf, in summit outcrop, Alt. 7500 ft. Minor summit, on second ridge north of Davis ridge, running east from Mount Jackson. Antarctic Peninsula

On stones, stony knolls with Giant petrel nests, Alt. c. 200 ft. Below ice cap, SW region of Candlemas Island. South Sandwich Islands

Near snow petrel nest on south-facing cliff, moist from melting, Alt. 750 m. Lassus Mountains, Alexander Island. Antarctic Peninsula, Alexander Island

Lying on a flat stone, on flattish open part of ridge, Alt. 2400 ft. North-east ridge of Mount Hill. Antarctic Peninsula

On remains of oak water barrels, Alt. 10 ft. Drying Point, Borge Bay, Signy Island. South Orkney Islands

On dry rocks. Cape King, Victoria Land. Antarctica, Ross Sector

Growing in fissure on quartz in granite. Alt. 150 m. Boulder field near main lake, "Gondwana" area, Victoria Land. Antarctica, Ross Sector

On dead moss (Tortula princeps, Bryum pseudotriquetrum). Alt. 25 m. Apostrophe Island, Victoria Land. Antarctica, Ross Sector

Dry rocks. Alt. 10-30 m. Galindez Island, Argentine Islands, Graham Coast. Antarctic Peninsula

Among and on mosses on knolls, Alt. 100-300 ft. Flanking ice-cap and occupied by giant petrel colony, SW region of Candlemas Island. South Sandwich Islands

On timber of old boat on beach, Alt. 3-10 m. Whalers Bay, Deception Island. South Shetland Islands

On rocks, Alt. 60 m. Edge of cliffs at extreme east end of South Beaches, Byers Peninsula, Livingston Island. South Shetland Islands

Alt. 1250m. Carlson Peak, Bean Peaks, Ellsworth Land. Antarctica, Scotia Sector

Wet bryophyte flush on north-facing slope, Alt. c. 50 m. South side of King Edward Cove. South Georgia

Rostkovia bog, Alt. 25 ft. Behind Burnet Cove, Maiviken. South Georgia

Submerged in stream, Alt. c. 100 ft. Shore behind Aniline Islet, Moraine Fjord, Cumberland East Bay. South Georgia

Fumarole vents, Alt. 100 ft. Finger Point, Visokoi Island. South Sandwich Islands

In rock crevices, Alt. c. 100 ft. Above shore, west end of King Edward Point, Cumberland East Bay. South Georgia

Wet banks of stream, Alt. c. 100 ft. Near the east end of valley, running north-west of Husvik, Stromness Bay. South Georgia

En vega de altura. Alt. c. 900 m. Provincia Santa Cruz, Depto Guer Aike. Meseta Latorre. South America, Argentina

Submerged at edge of pool, Alt. 25 ft. Near Dartmouth Point, Cumberland East Bay. South Georgia

Patagonia, Punta Arenas. South America

The Snares. New Zealand

On mica schist stones. Alt. 240 m. Gneiss Hills (north), Signy Island South Orkney Islands

Vertical faces on north and west sides of quartz-mica-schist outcrop, Alt. 10 ft. Berry Head, Borge Bay, Signy Island. South Orkney Islands

Rocks inundated by nitrogenous melt, Alt. 20 ft. Above Knife Point, Borge Bay, Signy Island. South Orkney Islands

Mainly on damp loose gravel and rocks between larger stones, 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

Upper surface of dry rocks, usually along fine cracks or lines of weakness, Alt. c. 1,400 ft. small outcrop on south side of Sjogren Glacier, Trinity Peninsula. Antarctic Peninsula, Trinity Peninsula, East Coast

Dry upper surface of upstanding boulders, Alt. 135 ft. flat area on south side of Lake Boeckella, and ice at foot of hill 433, Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

Upper surface of drier rocks and stones, Alt. c. 140 ft. near south-east shore of Lake Boeckella, Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

Wall of vertical north-facing rock, in small cracks running with water, 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

From Adelie colony zonation, Spindrift, Signy Island. South Orkney Islands

Dry loose rocks on summit, Alt. c. 2800 ft. small nunatak 3 miles west of Tower Peak, between Sjogren Glacier and Larsen Inlet, Trinity Peninsula. Antarctic Peninsula, Nordenskjold Coast

In patches, mainly in the centre of N-facing area behind cape. Cape Sastrugi. Antarctica, Ross Sector

Exposed west rock face, Alt. 1300 ft. Top of Peak 1303, Cragsman Peaks, Coronation Island. South Orkney Islands

Wet north facing rocks below cliff, Alt. 20 ft. Promontory north of Lynch Island, Coronation Island. South Orkney Islands

Wet north facing rock, Alt. 25 ft. Promontory opposite Lynch Island, Coronation Island. South Orkney Islands

Coastal rocks. Alt. 15ft. East side of Galindez Island, Argentine Islands. Antarctic Peninsula, Graham Coast

Moist stones on raised beach. Alt. 5-10 m. North side of Leonie Island. Antarctic Peninsula

Behrendt Mountains, Ellsworth Land Antarctic Peninsula

On volcanic dyke. Alt. 100 m. Upper slopes on south side of ridgeline running southwest from Cerro Tesore, Snow Hill Island. Antarctic Peninsula

Dry exposed boulders and stones. Alt. 10 m. Inexpressible Island, Victoria Land. Antarctica, Ross Sector

On moist soil floor of Nothofagus pumilio forest by roadside. Eastern shore of Lago El Parrillar, Peninsula Brunswick, Depto. Magallanes, Prov. Magallanes. South America, Chile

East facing, moist rock ledge, Alt. c. 400 ft. Cliffs to west of Gull Lake, lower point of Orca Peak, Cumberland East Bay. South Georgia

Sides and upper surfaces of both loose stones and rock, Alt. c. 600 ft. small cliff at south-west corner of Larsen Inlet, Nordenskjold Coast. Antarctic Peninsula, Nordenskjold Coast

On dry rocks and boulders, Alt. 200-300 m. Mount Alexander, Joinville Island. Antarctic Peninsula

On large boulders. Alt. c. 200ft. Neny Island, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

On scree and rocks, Alt. 25 ft. Western shore of bay east of BAS station, west coast of Horseshoe Island, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

Dry rocks, Alt. 5-15 m. South-west side of Millerand Island, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

Over stones and rocks, Alt. 50 ft. Near Drying Point, Borge Bay, Signy Island. South Orkney Islands