Clublike (tapering shape) is the etymology of rhopalic
The poems range from rhopalic
verse (such as snowballs and melting snowballs) to formal verse such as sestinas and sonnets (the later form explored in several different variations) to prose poems, mixed forms, and poems whose organizational principles are more difficult to discern.
For example, a rhopalic
may have each successive word in a line or verse longer by one syllable than its predecessor.
The most extreme situation of this nature occurs when one has a reverse rhopalic
phrase, with the last word before the target one letter long, the next-to-last word one or two letters long, the third-to-last word one, two or three letters long, etc.