Picture of White Allium Flowers

The ornamental flowering alliums, although relatives of plain old garlic, are much more impressive bloomers. Nor are you restricted to white blooms. "Globemaster" allium, for instace, bears striking purple blossoms. This giant, grown in hardiness zones 4-9, stands 35"-40" tall and flowers in late spring. As its name suggests, the blossoms are globe-shaped; and they're huge, measuring several inches across. The flower heads are actually composed of numerous star-shaped florets (up to 1,000 of them!).