What Is This Mystery Plant Found In Pacific Northwest?

Ask the Expert: Can you please identify this plant
This plant showed up in my garden this spring and has grown into a bush about 2.5 ft high since then, but it never flowered.  I live in the Pacific Northwest. Joe

Plant Expert Reply:

I think it is some type of Euphorbia.  Maybe Euphorbia amygdaloides or Euphorbia myrsinites.  Where in the pacific northwest did you find this plant?  Knowing which state or city might help make a stronger identification.