Adverse Possession Question

[Arnold Finkelstein]

I understand all the requirements/rules of Adverse Possession in Alabama, but I'm not entirely clear on the required length of time.  I have inferred that there are two clocks.  Ten years if the party with adverse possession has some color of title and/or has been paying taxes on the parcel, and twenty years if just occupying land.  I have scoured my 3 year old copy of Denise Evans' Alabama Tax Sales, but I'm not seeing it there.