A flat leaf version of your typical chive, and with a distinctly garlicy flavor. You can eat both the leaves and the blossoms.
Want to learn more? Look up Garlic Chives on Wikipedia.
STORE: In a jar on your counter. Fill a jar with cool water, stick sprigs into it, and keep out of direct sunlight. Pick off leaves that will be submerged in water. When stored this way, your herbs should keep fresh for weeks.