This exquisite, small but strong, little Japanese spindle tree (Euonymus sieboldianus) is from Google images. Euonymus is a vast and varied genus with about 160 species. Some are suited for bonsai, though it’s not too often you see them used for bonsai.
It spite of the fuzzy image, you can still get a pretty good idea of both the power and colorful beauty of this spindle tree. Though it’s a E. sieboldianus, just like the one above (at least that’s how the original in Bonsai Today 31 is labeled), the bark looks quite different; though with the poor quality image, it’s hard to be too sure about any of the details.