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5 deg. slope exposed bedrock, facing north, Alt. 100 ft. Lynch Island. South Orkney Islands

On rocks among mosses, Alt. 50 ft. Above Tern Cove, Signy Island. South Orkney Islands

Sheer rock with low shelf, Alt. 50 ft. Granchar Island, Bennet Islands, Hanusse Bay. Antarctic Peninsula, Loubet Coast

Threshold Outcrop, Adelaide Island. Antarctic Peninsula, Fallieres Coast

Pfaff Island, Bennett Island, Hanusse Bay. Antarctic Peninsula, Loubet Coast

North facing steep slabs of rock and scree, wet in places, Alt. 50-200 ft. Slope behind the old FIDS hut, Cape Geddes, Laurie Island. South Orkney Islands

On rocks and boulders. Alt. 33m. Signy Island. South Orkney Islands

West to north west facing steep slope of Chorisodontium banks, eroded to varying degrees, Alt. 20-60 ft. NE peninsula of Matthews Island. South Orkney Islands

Loose open slopes and walls, facing south-east, Alt. 250 ft. East slope of Scar Hills, Hope Bay. Antarctic Peninsula

Wind-blown specimen, Alt. - m. Near north-east coast, O'Brien Island. South Shetland Islands

With Andreaea and lichens on inclined, SW facing rocks, Alt. 50 ft. SW corner of Laggard Island, Anvers Island, Danco Coast. Antarctic Peninsula, Danco Coast

Rock outcrop, Alt. c. 60 ft. beneath anemometer tower, Berntsen Point, Signy Island. South Orkney Islands

On basalt rocks in Usnea fasciata community. Alt. 265 m. Jardine Peak, Ezcurra Inlet, Admiralty Bay, King George Island. South Shetland Islands

Rock faces, boulders and scree. Alt. 5-50 m. North side of Leonie Island. Antarctic Peninsula

Dry rock surfaces. Alt. 1000ft. Ceritos Rocks, near Mount Usborne, East Falkland Islands. Falkland Islands

Decaying wood on deck of hulk. Alt. 5m. "Louise", Grytviken, Cumberland East Bay. South Georgia

Upper surface of exposed bedrock, Alt. 327 ft. Scar Hills, Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

Tended to be on smaller boulders in shelter of larger ones, Alt. 886 ft. Nobby Nunatak, Hope Bay. Antarctic Peninsula, Trinity Peninsula, East Coast

On ledge at foot of cliff, Alt. 5,000 ft. Station 91, Tottanfjella, Queen Maud Land. Antarctica, Maud Sector

On flat upper surfaces of bedrock, Alt. 150 ft. Alectoria Island, Prince Gustav Channel. Antarctic Peninsula, Trinity Peninsula, East Coast

Upper flat surfaces of dry summit rock, Alt. 150 ft. Alectoria Island, Prince Gustav Channel. Antarctic Peninsula, Trinity Peninsula, East Coast

Upper surface of stable dry rocks, Alt. c. 1400 ft. small outcrop on south side of Sjogren Glacier, Trinity Peninsula. Antarctic Peninsula, Trinity Peninsula, East Coast

On south side of dry summit rocks, Alt. c. 2500 ft. small nunatak to south of Tower Peak, between Sjogren Glacier and Larsen Inlet. Antarctic Peninsula, Trinity Peninsula, East Coast

On rocks, Alt. 50 ft. near hut, Blaiklock Island, Loubet Coast. Antarctic Peninsula, Loubet Coast

Rock faces, Alt. 100-200 ft. Hermit Island, Anvers Island, Danco Coast. Antarctic Peninsula, Danco Coast

On flattish areas, facing west, on both bedrock and loose stones, Alt. 600 ft. West face of Nunatak to WSW of Fidase Peak. Antarctic Peninsula

Sloping slab facing north, dry and brittle, Alt. 3275 ft. Ridge starting at 2000ft rising to 4500ft, Southern of Engle Peaks main east ridges. Antarctic Peninsula

North-facing slope, on bedrock of fine conglomerate only, Alt. 40 m. Ablation Point, Alexander Island, George VI Sound. Antarctic Peninsula, Alexander Island

Flat open rocks facing south-west, loose stones lying between outcrop, Alt. 4450 ft. 200ft. descending ridge from south Engle Peaks. Antarctic Peninsula

Isolated colony c. 9 ft. x 3", facing north-east, Alt. 4400 ft. On flattish ledge of dark rock outcrop on spur, south side of Dana Glacier. Antarctic Peninsula

Attatched to predominently flat rocks facing east on a loose rock and outcrop ridge, Alt. 2400 ft. Furthest east-facing ridge of chain north of Guard Glacier. Antarctic Peninsula

On flat stones on north facing scree slope, Alt. 100 ft. Southern shore of bay east of base hut, west coast of Horseshoe Island. Antarctic Peninsula, Fallieres Coast

NE side, near top, Alt. 3400 ft. Small Nunatak, Wilkins Coast. Antarctic Peninsula, Wilkins Coast

Growing abundantly in southern aspect, Mountains north of Chapman Ridge, MacRobertson Land. Antarctica, Enderby Sector

Abundant on rock and small pebbles in a northerly aspect, Tschuffert Peak, MacRobertson Land. Antarctica, Enderby Sector

On small outcrop of Red Rock Ridge granite, Alt. 10 ft. North side of Safety Col, Red Rock Ridge, near Stonington Island, Marguerite Bay. Antarctic Peninsula, Fallieres Coast

In cracks ledges and flat areas, on a north-facing scarp, Alt. 5550 ft. A small knoll of basic gneiss, c. 50 ft. high, to the east of Welch Mountains. Antarctic Peninsula

Flat rock on north of ridge facing north-east, Alt. 3300 ft. Ridge starting at 2000ft rising to 4500ft, Southern of Engle Peaks main east ridges. Antarctic Peninsula

On shelf on steep-sided, south-facing bluff, Alt. 1800 ft. south side of Cape Casey, Cabinet Inlet, Foyn Coast. Antarctic Peninsula, Foyn Coast

On a loose stone and outcrop ridge, on basic rock, Alt. 3000 ft. North summit on the east side of the Guard Glacier ridge. Antarctic Peninsula

Loose stones on the south-east side of the ridge, Alt. 2850 ft. On ridge running north-east from summit of Mount Hill. Antarctic Peninsula

A small vertical wall, c. 2 ft. wide facing south, Alt. 2400 ft. On lower section of the north-east ridge of Mount Hill. Antarctic Peninsula

In a basic dyke on th e NNW side of the hillock, damp scoup facing north, Alt. 5600 ft. Rock hillock to the west of small knoll, to the east of Welch Mountains. Antarctic Peninsula

On N facing rock in gabbro, Alt. 1000ft. Unnamed Nunatak S of Bel Knap Nunatak, Thurston Island, Eights Coast. Antarctica, Byrd Sector

Dry rock surfaces with Umbilicaria spp, Usnea spp, and Himantormia lugubris, Alt. 100 m. West side of Cape Hansen, Coronation Island. South Orkney Islands

Rock surfaces, especially when melt water trickles down. Alt. 35m. SSSI area, Bailey Peninsula. Budd Coast. Antarctica, Wilkes Sector

Dry rocks. Alt. 60m. SSSI area, Bailey Peninsula. Budd Coast. Antarctica, Wilkes Sector

Dry, sheltered rocks. Alt. 15m. Whitney Point, Clark Peninsula. Budd Coast. Antarctica, Wilkes Sector

On large and small volcanic stones. Alt. c.400m. Plateau, Cockburn Island. Antarctic Peninsula

Dry rocks and stones, especially in sheltered situations. Alt. 20-85m. N side Mitchell Peninsula, O'Brien Bay. Budd Coast. Antarctica, Wilkes Sector