The reason that these two bands have been mixed up is because the name "The Trees" is incorrect for both bands. The UK folk band is called "Trees" and the American Christian community is called "The Trees Community".
Trees Community was a sort of hippy-Christian commune from - I think - New York. Trees were a psych-folk band from the UK who did 2 albums - The Garden of Jane Delawney and On The Shore. Both acts are really good.