The Rational Citrons is a poetic riddle intended to teach a moral lesson originally devised by the dwarf Rekig Flaillandfall. The rules of the form are applied by poets to produce individual poems which can be recited. The poem is a single tercet. Use of assonance and consonance is characteristic of the form. Each line has seven syllables. Every line of the poem has a terminal caesura. The second line of the tercet shares the underlying meaning of the first line. The third line of the tercet uses the same placement of allusions as the first line. The second line of the tercet reverses the grammatical structure of the first line. The first line concerns the past. The second line concerns current events. The third line concerns the future. The rhyme scheme of the poem is ABB.