Many thanks to Alfie Shoyger for March's slightly delayed Poetry Monthly:

Rimas Dissolutas. This is a form where, within verses, there are no rhymes at all. However, all subsequent verses rhyme with the first one. Each verse can be as long as you want, and you can have as many verses as you want, so for example it could be ABCD ABCD ABCD etc, or ABCDEF ABCDEF ABCDEF, or whatever.

Picture Credit:http://tinyurl.com/y3vsyaqe