Final answer:
A lyric poem of fourteen lines is traditionally known as a sonnet, which may follow various rhyme schemes and include a volta.
Step-by-step explanation:
The traditional form of a lyric poem consisting of fourteen lines is a sonnet. There are various types of sonnets, but all share the basic characteristic of having fourteen lines. The sonnet often contains a volta, which is a shift in thought or emotion. One of the most recognized forms is the Italian (or Petrarchan) sonnet, which is divided into an octave (eight lines) following an 'abba abba' rhyme scheme, and a sestet (six lines) that may have varied rhyme patterns. Another well-known form is the Shakespearean sonnet, typically composed of three quatrains followed by a couplet, adhering to an 'abab cdcd efef gg' rhyme scheme. Sonnets are a significant element of traditional poetry and have been used by poets to express a wide range of emotions and themes.