I’m on vacation, so only a short written accompaniment today. – Daniel
Spread-leaved peat moss or rough peat moss is native to wet, acidic areas of Asia, Europe, North America, northern Africa, New Zealand and Greenland according to the Moss Flora of China entry on Sphagnum squarrosum.
Although it is very easy to recognize the distinctive peat moss from other mosses, identification of individual Sphagnum species often requires the use of a microscope. Complicating matters is that a sample of peat mosses may contain more than one species growing within the same clump (a personal observation).