This is chives. It's from the herb garden of the Cloisters in New York City.
Chives (Allium schoenoprasum L.) belong to the same family as onions, leeks, and garlic. Although they are native to Asia and Eastern Europe, by the sixteenth century chives were common plants in herb gardens throughout Europe. Chives are hardy, draught tolerant, perennials, eight to twenty inches tall, that grow in clumps from underground bulbs. The leaves are round and hollow, similar to onions, but smaller in diameter. In June or July, chives produce large round flower heads consisting of purple to pink flowers.
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