Lysimachia clethroides (Gooseneck Loosestrife) is a vigorous, rhizomatous, clump-forming perennial boasting a profusion of gracefully arching flower spikes, 12-18 in. long (30-45 cm), packed with many tiny, star-shaped white flowers. Resembling a goose's neck, they bloom for weeks in mid to late summer. They are borne above the fine foliage of pointed, slightly pubescent, 3-6 in. long leaves (7-15 cm), which turns orange-red in the fall. Native to Japan and China, this plant spreads aggressively by underground stems to form large colonies. Easy to grow, it is excellent at providing fast-spreading cover when required, creating great visual impact. However, attention should be paid to controlling its spread. Best when massed in a wild garden where it can be allowed to roam freely and naturalize in broad drifts. Prized by florists for fresh cut flower arrangements.