The Berry of Periwinkles is a ribald poetic form intended to praise the concept of nature which grew out of the performances of The Brazen Evils. The rules of the form are applied by poets to produce individual poems which can be recited. The poem is a single septet. Use of internal rhyme, alliteration and metaphor is characteristic of the form. Every line of the poem has an initial caesura. The fifth line of the septet shares the underlying meaning of the fourth line. The rhyme scheme of the poem is ABCAAAC.