The endecha is a 16th-century Spanish poetic form with the following guidelines:
Quatrain (or four-line) poem (or stanzas).Rhyme scheme: abcb
Seven syllables per line for lines one, two, and three.
Line four has 11 syllables.
In Edward Hirsch’s A Poet’s Glossary, he refers to the form above as an “endecha real” (or “royal lament”). In his guide, the endecha is a lament or dirge that has four lines of six- or seven-syllable lines.
Thankyou to Writet’s Digest for the summary above