What is the difference between cuckoo flax moss and sphagnum moss?

Kukushkin flax differs from sphagnum:

Unbranching stem;
The presence of rhizoids;
One spore box is formed on the female plant;
The box has an elongated shape;
Unlike sphagnum, it has only one type of leaves.
Sphagnum leaves with two types of cells: dead and alive. Dead cells are a water barn, living cells are green; photosynthesis takes place in them.
Sphagnum absorbs water 25 times its weight, while cuckoo flax absorbs 4 times its weight.

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