Rick, I didn't post the poem, but even so I was not aware of the spacing. I agree it is significant. Diana
Your email left out an important part (at least to me) of the poem, “In a Station of the Metro”. Pound put several spaces between “apparition” and “of”, between “faces” and “in”, between “Petals” and “on” and between “black” and “bough”.
Or think of these lines from 'In a Station of the Metro' :
The apparition of these faces in the crowd;
Petals on a wet, black bough.