Anemone deltoidea

Common Names

Columbian Windflower, Columbia Windflower, Western White Anemone

Summary

Anemone deltoidea, commonly called Columbian windflower or western white anemone, is a rhizomatous perennial herb native to the forests of the U.S. West Coast. It grows 10–30 cm tall, with a basal leaf divided into three large toothed leaflets and additional leaves along the mostly bare stem that resemble those leaflets. The inflorescence bears a single flower with five white petal-like sepals and no true petals, accompanied by up to 120 whiskery stamens and many pistils; the fruit is a cluster of spherical achenes. A key identification feature is that involucre leaves just below the flower are simple and not deeply dissected. Flowers typically bloom from April to July.

Used in woodland plantings, it tolerates full sun to part shade and grows in moist to mesic forests at elevations around 100–2000 meters; it forms low colonies about 4–12 inches tall and can spread vigorously. Cultivation notes include regular to occasional watering, suitability for containers, and use as a lawn alternative or in shaded garden areas; it dies back to the ground in winter and is considered deer resistant in garden contexts.

Lifecycle

Perennial

Height

4-12 inches

Spread

1.5-2.5 inches

Sunlight Requirements

Ideally Full Sun to Partial Shade.

Soil pH

Unknown

Sources unavailable

Bloom Color

White

Bloom Time

Spring and Summer (April to July).

Foliage Color

White

Fall Foliage Color

Unknown

Leaf Lifecycle

Deciduous

Growth Rate

Fast

Seasons of Interest

Spring and Summer

Attracts Wildlife

Attracts bees (including bumble bees), no information on hummingbirds, butterflies, or birds as visitors