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On basaltic and yellow tuff boulders, Alt. 50-150 ft. By prominent yellow tuff, pinnacled ridge, northern end of Saunders Island. South Sandwich Islands

On rock above shore, Alt. c. 15 ft. below north side of Observation Bluff, Signy Island. South Orkney Islands

In cracks in east-facing rocks, Alt. 30 ft. Adelaide Island. Antarctic Peninsula

Stones where melt water collects, Alt. 10-25 m. Dismal Island, Faure Islands, Fallieres Coast. Antarctic Peninsula, Fallieres Coast

Along cracks in schist and quartzite and sometimes on the surface of sheltered stones. Cape Sastrugi. Antarctica, Ross Sector

In minor depressions and on exposed surfaces, on both rocks and loose scoria. Small volcanic cone with crater lake. Alt. 810 m. Daniell Peninsula. Antarctica, Ross Sector

Sphinx Hill, Admiralty Bay, King George Island. South Shetland Islands

On rock inundated by nitrogenous melt, Alt. 5 m. NE shore of Doubtful Bay. South Georgia

On boulders near gull rookery, Alt. 30 ft. Lynch Island. South Orkney Islands

Amongst loose stone on flat area, Alt. 140 ft. East side of Lake Boeckella. Antarctic Peninsula

On bird perching rocks by shore. Alt. 3 m. Barrel Point, Cardozo Cove, Ezcurra Inlet, Admiralty Bay, King George Island. South Shetland Islands

Wet, flat rubble gully with mosses. Alt. 19 m. East/west central gully, Cormorant Island, Danco Coast. Antarctic Peninsula, Danco Coast

Wet rock ledges below petrel nests, and moss banks, Alt. 100 ft. Observation Bluff, Signy Island. South Orkney Islands

East facing nitrogenous/maritime rock ledges, Alt. 8 ft. Billie Rocks, Borge Bay, Signy Island. South Orkney Islands

Coastal rocks. Alt. 10ft. East side of Galindez Island, Argentine Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Rocks where melt water trickles, Alt. 15-50 m. To NE of Mount Alexander, Joinville Island. Antarctic Peninsula

Moist rocks, Alt. 20-60 m. Northeast to northwest slope, Green Island, Berthelot Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Rocks and flakes on eastern summit, usually facing down, Alt. 3675 ft. A 0.75 mile ridge running south-east, then south and back to south-east, south of Bingham Glacier. Antarctic Peninsula

Along fine cracks or lines of weakness on upper dry surface, Alt. c. 1,400 ft. Small outcrop on south side of Sjogren Glacier. Antarctic Peninsula, Trinity Peninsula, East Coast

On loose stones on a minor ridge facing south, Alt. 6250 ft. Minor spur to south, on second ridge north of Davis ridge, running east from Mount Jackson. Antarctic Peninsula

On a shelf sloping 45 deg. to the west, north-facing, and shaded by overhang, Alt. 7900 ft. Rock ridge running north-south, Mount Jackson area. Antarctic Peninsula

In basic rock crevice, facing west, Alt. 3800 ft. North summit on the east side of the Guard Glacier ridge. Antarctic Peninsula

On iron-stained basic rock on a ridge of loose bedrock inclined to east, Alt. 3000 ft. North summit on the east side of the Guard Glacier ridge. Antarctic Peninsula

On loose stones on crest of ridge, facing south, Alt. 7700 ft. Eastern outcrop on second ridge north of Davis ridge, running east from Mount Jackson. Antarctic Peninsula

Growing on pebbles in a shaded crevice, West side of Mawson Rock, MacRobertson Land. Antarctica, Enderby Sector

North Mawson Ranges, MacRobertson Land. Antarctica, Enderby Sector

Dry stones and rocks. Alt. 30 m. "Flag Hill", Rothera Point, Adelaide Island. Antarctic Peninsula

On soil under rock overhang. Alt. 2250 ft. Sheltered cliffs with seepage on ridge between Mt. Usbornes 1 & 2. Falkland Islands

Rock, Alt. 70 ft. The Windscoop, Galindez Island, Argentine Islands, Graham Coast. Antarctic Peninsula, Graham Coast

Large boulders. Alt. 250 ft. Hermit Island, Arthur Harbour, Anvers Island, Danco Coast. Antarctic Peninsula, Danco Coast

Rocks, Alt. 300 ft. Cape Tuxen, Graham Coast. Antarctic Peninsula, Graham Coast

Rocks on exposed hilltop. Alt. 150 ft. Porteous Point, Signy Island. South Orkney Islands

On exposed Andreaea moss. Alt. 1273 ft. Top of Wave Peak Buttress, Coronation Island. South Orkney Islands

Growing over rocks on west facing slope, Alt. 100 ft. Moraine Valley, Signy Island. South Orkney Islands

On dry rock in crevices and in gravel. Alt. 20-30 m. Area between Lystad Bay and former BAS station, Horseshoe Island, FallieresCoast. Antarctic Peninsula, Fallieres Coast

On dry rocks and stones, (common) Alt. 10-60 m. North-facing slopes and summit plateau, Lynch Island. South Orkney Islands

On stones and gravel, Alt. 200 m. North end of Active Sound, Joinville Island. Antarctic Peninsula

Over moss on raised beach, Alt. 20 m. Point Hennequin, Admiralty Bay, King George Island. South Shetland Islands

In Dicranum bank on north-facing slope, Alt. 40 ft. Lynch Island. South Orkney Islands

On inland rocks, Alt. 50 ft. Olivine Point, Coronation Island. South Orkney Islands

On rocks on raised beach facing north, Alt. 20 m. Point Hennequin, Admiralty Bay, King George Island. South Shetland Islands

On Polytrichum sp. Alt. 259m. Ridge of bluff 0.5 km SW of Endurance Glacier, Elephant Island. South Shetland Islands

On Dicranum-Polytrichum banks, Alt. 50 ft. Valley running down to Mooring Point, Borge Bay, Signy Island. South Orkney Islands

Amongst Usnea aurantiaco-atra and Himantormia lugubris on dry exposed rocky knoll. Alt. 120 m. Jane Col, Signy Island. South Orkney Islands

Central Masson Range, MacRobertson Land. Antarctica, Enderby Sector

On stones in cracks around stone polygons. Alt. c. 300 m. High valley south of Moraine Coire, Fossil Bluff, Alexander Island. Antarctic Peninsula, Alexander Island

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

Epiphytic on Usnea antarctica, Alt. 120 ft. Foot of hill between Factory Cove and Paal Harbour, Signy Island. South Orkney Islands

On sloping Chorisodontium aciphyllum bank, Alt. 150 ft. Behind the base hut, Signy Island. South Orkney Islands

On quartzose sandstone rocks, Alt. 800 ft. Mount William, Falkland Islands. Falkland Islands