It's only tea made from the leaf that's allowed on LL and CD (I would imagine LT as well).
So that's green tea, peppermint tea and ordinary black tea.
You can have Earl Grey in small quantities as the amount of orange oil in it is apparently very small.
Anything else runs the risk of knocking you out of ketosis!
I drank gallons of redbush tea whilst SSing and altho it is made from needle-shaped leaves, I think the amounts of it really affected MY weightloss, altho I know it was absolutely fine for other people. GRR! lol