The sonnet, deriving from 13th century Italy, consists of 14 lines divided into the eight-line sestet and six line octet. Rhyme schemes vary - the generator presently knows two variants: abba abba cde cde (from the Italian tradition) and abab bcbc cdcd ee (more common in English poetry since Spencer). The line length tries to approximate that of classical blank verse, without any attempt to follow its meter. – The rhymes (in practice, the two last letters of the line, if any) originate from the 22 first sonnets in Elizabeth Barrett Browning’s suite Sonnets From the Portuguese (1850).

Couplets: poems consisting of rhyming two-line stanzas (cf. the “heroic couplets” of pre-romantic writers). The line length as well as the amount of stanzas is customisable. Here, too, the attempted rhymes come from Barrett Browning, now without attention to the frequency in the original.

Pantoum, originally Malay verse form composed in quatrains, where the second and fourth lines of each stanza reappear as first and third lines of the next stanza. - The generator varies the line length by random. The length of the poem is customisable.

Sestina is the most complex of the verse forms introduced by the troubadours (i.e. Artaud Daniel, fl. 1180). It is composed of six stanzas of six lines each, followed by a three-line envoy. All the stanzas have same end-words, but in shifting order. - The generator first composes the first stanza, then gets the material for the rest of the poem by additional searches, where the end words in turns get added to the original search string. This is why the sestina takes a while to load. For the same reason, it tends to fail more often than the other forms. It is advisable to use simple, preferably one word, search strings.

By collage we mean here a poem consisting of random cuttings from the Google return string, laid variably across the page.