Step 1: Understanding the Concept:
Vegetative propagation is a type of asexual reproduction in plants where new plants grow from parts of the parent plant, such as the stem, root, or leaf. The question asks for an example where this happens via leaves.
Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{Bryophyllum: This plant is famous for its ability to reproduce through its leaves. Adventitious buds develop along the notches of the leaf margins. When these tiny plantlets detach from the leaf and fall on moist soil, they grow into new, independent plants. } \\ \bullet & \text{Onion: Propagates through its modified underground stem, which is a bulb. } \\ \bullet & \text{Potato: Propagates through its modified underground stem, which is a tuber. The "eyes" of the potato are buds that can sprout into new plants. } \\ \bullet & \text{Rose: Is commonly propagated by stem cuttings. A piece of the stem is cut and planted, which then develops roots and grows into a new plant. } \\ \end{array}\]
Step 3: Final Answer:
Bryophyllum is an example of a plant that undergoes vegetative propagation through its leaves.