There is support for poems via the poem tag, which can contain a title, author and multiple stanza, each containing multiple line. See the source of the following poem for an example of the exact arrangement. Note how the first quote crosses two line elements and how this is handled in the source. There are many very flexible options for horizontal alignment and indentation. Further extensive examples, constructed by Jahrme Risner, are available in the example Humanities document.
Ken Levasseur, who teaches at UMass-Lowell, has limericks in his Applied Discrete Structures textbook. When he reported that they were unable to be the target of a cross-reference, Karl-Dieter Crisman penned the following limerick.