Perched erratic- granite gneiss, Parry Sound, Ont.

Peridemium harknessii on jack pine at base causing death of planted tree at 12 years. Abitibi-Paper, Spruce River Road

Peridermium harknessii gall on lodgepole pine. Northwestern Pulp & Power, Hinton

Peridermium harknessii galls on jack pine. Sapawe

Peridermium harknessii galls on jack pine. Sapawe

Peridermium harknessii on jack pine. N.B. repeated branching. Sapawe

Aerial photographs of large areas of dull green regrowth after 1935 and 1942 forest fires near Perrigo Lake, Ontario. Patches of older unburnt forest stands can also be seen littering the landscape. The lake can also clearly be seen in photographs B…

Aerial photographs of large areas of dull green regrowth after a 1942 forest fire near Perrigo Lake, Ontario. Areas of green unburnt forest stands can also be seen littering the landscape. The lake can also clearly be seen in the photographs.

Aerial photograph of a large area of shorter regrowth scattered amongst older and taller forest stands near Perrigo Lake, Ontario. Small parts of the lake can also be seen.

Soil type: #41

Photographs of forest stands near Perrigo Lake, Ontario. The photographs were taken from across a body of water which can be seen at the bottom of the images. A small amount of burnt trees can be seen but the stands appear to be mostly…