THANKS

[Bonaventure W Magrys]

Actually, a concentrated enough solution of carbohydrates, eg. 30% sucrose,
will not freeze. I have observed Arisaema tubers, on ripening, excreting
moisture so that even dry soil around them becomes damp.The remaining
moisture in the tubers is in balance with stored carbohydrates in such a
ratio as to possibly prevent freezing damage. Temperate deciduous tree buds
use this mechanism.

Bonaventure

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I'm not certain sure about the glycerine in the tissues.  I assumed that
since it is the device by which many plants do not freeze in the winter,
and
assumed that it was true for Symplocarpus also.  Thanks for catching this.
Adam