General :: Expanding Globs In Xargs?

I have a directory like this:
mkdir test
cd test
touch file{0,1}.txt otherfile{0,1}.txt stuff{0,1}.txt

I want to run some command such as ls on certain types of files in the directory and have the * (glob) expand to all possibilities for the filename.

echo 'file otherfile' | tr ' ' '
' | xargs -I % ls %*.txt

This command does not expand the glob and tries to look for the literal 'file*.txt'

How do I write a similar command that expands the globs? (I want to use xargs so the command can be run in parallel)