Accentual syllabic or syllabic form written in tercets with
an interlocking rhyme scheme. At some point, the poem ends with a single line stanza rhyming with the preceding stanza’s middle line.
At least one soi-disant expert claims that it is usually iambic pentameter and that it ends in a couplet as: yzy zz. But he seems to be incorrect on many of
his assertions.
Another variation is ending with a uniformly rhymed triplet: aba bcb cdc...yzy zzz.
Why can’t these poets make up their minds or stick to the original? | 
