[dad911]

Well, you said it wasn't structural, so it is common when installing long trim moldings(base, crown, etc) to bevel rather than butt seams. That way if/when it shrinks a little, it doesn't leave a gap.

More specifics may have yielded a better solution.

Now that you have a biscuit joiner, depending on your application, you can also use 1x6 and stagger the joints, and join the edges. Or use longer 1x6. Joint lengthwise may be less visible than a butt joint.