6 (B010);var 1 (unspecified): CANLL: Scotter 3774, 18 August 1961, Ross Lake, 62deg 42'N 113deg 15'W; Scotter 30138, 21 July 1979, Banks Island, 73deg 59'N 118deg 57'W, 30-125 m elev., Dryas community type: 2 (R196); Thomson 1984 maps: 6 (R196); var complicatum: PMAE: C.D. Bird 31021, 9 July 1972, Mackenzie Mountains, Backbone Ranges, Root River Drainage, unglaciated area, 63deg 05'N 125deg 54'W, elev 6050 ft., aspect W 0-10deg, W-running ridge, site 48, on limestone; C.D. Bird 35071, Mackenzie Mountains, Twau Range, tributary of the Arctic Red River, 65deg 22'N 130deg 45'W, elev 1000 m, SW-facing slope, on shaly sandstone; C.D. Bird 30816, Franklin Mts., McConnell Range, 9 mi S of the summit of Cap Mountain, glaciated area, 63deg 17'N 123deg 12'W, elev. 3200 ft., aspect 0deg, limestone bird block on high ridge, site 42, on limestone, 8 July 1972: 3 (R196); Scotter 1523, 18 June 1961, south-east end of Hearne Lake, 62deg 20'N 113deg 08'W; Scotter 33577, 2 August 1979, vicinity of Bathurst Inlet, 66deg 08'N 106deg 58'W, in Carex, Salix-Dryas + Dryas-legume communities; (these were all named as Dermatocarpon fluviatile, but the lobe thickness is too great; they all have multiple holdfasts, they may be D. polyphyllizum instead, the I-reaction needs to be checked, specimens requested on loan: Scotter 2268, 3 July 1962, Rutledge Lake, 61deg 35'N 110deg 45'W; Scotter 3779, 18 August 1961, on rock in stream, Upper Ross Lake, 62deg 42'N 113deg 15'W; Ahti 14604, 18 August 1961, Upper Ross Lake, 62deg 40'N 113deg 15'W, on stones in small creek: 4 (R196); Thomson, Scotter & Ahti, 1969 (Great Slave Lake study): 1 (R196);