Although it has a fragrance that is similar to Absinthium, it never flowers. This is probably why it is unsuitable for absinthe making.
Is there a particular reason for the "flowering" note. If PC did flower, why would that make it suitable? Intensification/concentration of the flavour? I thought young leaves/tips would be all that was necessary.
I've got A. absinthium and PC growing in my garden this year and must say the PC is more fragrant. Seems like it ought to work great.
On a side note, should I expect either or both to come back next year? That is, will they survive the relatively mild Atlanta winter? I don't expect to have difficulty obtaining new plants next year, but if they perform better in subsequent years, I won't dig them up before re-planting the beds next Spring. What about the extras I have in large pots? Protect them in the garage or leave 'em out in the yard?