Cal in Bloom
The crocus is what Cal refers to his genitals as. Here's a picture (of a crocus, not Cal's genitals… get your mind out of the gutter).
You've probably heard the term "budding sexuality," a kind of creepy euphemism used to describe someone who is, um, blossoming into adulthood. Cal's crocus almost literally does bud, which he describes as "the blooming of the crocus" (3.10.59).
Unlike other notable symbols, like hot dogs and eggs, the crocus is a blend of both male and female aesthetic, just like Cal. Aww…