Blues
As readers will surely see from the list of poems tagged below, Langston Hughes was particularly enthusiastic about this form, and included many verses in this form in his 1927 collection, Fine Clothes to the Jew.
In that collection, Hughes included the following "Note," indicating how he was defining the Blues as a poetic form:
Scholars of poetry would agree with Hughes' characterization, and describe structure of the Blues as following an "AAB" pattern.A NOTE ON BLUES
The first eight and the last nine poems in this book are written after the manner of the Negro folk-songs known as Blues. The Blues, unlike the Spirituals, have a strict poetic pattern: one long line repeated and a third line to rhyme with the first two. Sometimes the second line in repetition is slightly changed and sometimes, but very seldom, it is omitted. The mood of the Blues is almost always despondency, but when they are sung people laugh.