Photographing your subject with your hand

Photographing your subject with your hand.

This is Usnea (松蘿) and it has medicinal uses. Commonly known as Old Man’s Beard.

Usnea is a indicator of very clean ambient air in the surroundings.

This plant is ultra sensitive to Sulfur Dioxide (SO2). The colourless gas is a byproduct through combustion route, such burning material made from sulfur.

So far, I only encountered Usnea twice in two different hike at about the same elevation of 1,600 meters above sea level.

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