An annual, except for every x years where x is greater than 1. Or am I missing something? Why is this interesting? Many plants only bloom once before dying.
Edit: for those of you unfamiliar with the term, an annual only blooms once a year before dying. This is opposed to a perennial.
Edit: for those of you unfamiliar with the term, an annual only blooms once a year before dying. This is opposed to a perennial.