6a4f4a19_Poetry_Form___The_Rengay__rengay
[Characteristic] Architecture: Starting and ending. [renku] A renku has a clear beginning and a closure, akin to a butterfly's seemingly random flight from one blossom to another. The poets are mindful of the overall structure of the poem, by making each link a definite wing beat (to continue the simile) along the way to the alighting place that is not yet know. The last link is recognized as being connected to the opening link (the hokku). [rengay] 
The rengay, being short and theme-based, has links like the ribs of a parasol with the theme of the rengay at the hub. There is typically no overall progression.
Poetry Form - The Rengay
rengay