This piece is from "Analphabet," a series of 26 visual poems in the form of a vertical comic strip. Each of the strips plays with the concept of how meaning is stored in individual letters and in those strips of letters that we call words, as well as the concept of labeling and naming. Each comic strip/poem is based on some kind of pun: verbal, visual, or both. In this case, "Just a p" equals "only p" or "nothing but p," but "A bouquet of p's" (punning on the idea of peas, etc.) shows that a p can sometimes be a q, or a b, or a d.