Future amaryllis, e.g.

BULB

Think of what you might plant underground in the fall to see colorful blooms emerge in spring, like a tulip or daffodil. It’s not a seed but a rounded storage organ.

An amaryllis is a flower that grows from a bulb, so "future amaryllis" hints at what it starts as before blooming. The word "e.g." signals that "bulb" is just one example of something that could become an amaryllis or similar plant. The clue plays on the idea of potential—what the flower will be in the future is already contained in its bulb form.