Appearance

Hemerocallis fulva is a bulbous perennial, 2-4 ft. (0.6-1.2 m) tall with round stems. Buds and flowers are edible and have a sweet-spicy or peppery flavor.

Foliage

Leaves are long, linear, strap-like, bright-green, 1-3 ft. (0.3-1 m) long and curve toward the ground.

Flowers

Flowers are large, showy, orange, usually with some striping; occur in clusters of 5-9 at the tip of the stalk; flowers in a cluster open one at a time, each for one day only; summer.

Fruit

Spreads by growth from thick, tuberous roots from which new plants are produced; seed; people tossing away whole pulled plants and by farm equipment or other machinery in fields.

Ecological Threat

Hemerocallis fulva established in natural areas pose a threat to native plants in field, meadows, floodplains, moist woods and forest edges. Once established, this plant multiplies and spreads to form dense patches that displace native plants. The thick tubers make it a challenge to control. Common or orange daylily was introduced into the United States in the late 19th century as an ornamental.

Resources

• Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S. Fish and Wildlife Service

Selected Images

Maps

Invasive Listing Sources

• City of Ann Arbor Michigan Parks and Recreation
• Delaware Invasive Species Council
• Georgia Exotic Pest Plant Council - Category 3
• Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
• Invasive Plant Association of Wisconsin
• Invasive Plant Species of West Virginia
• Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
• John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
• Kentucky Exotic Pest Plant Council - Significant Threat
• Maryland Department of Natural Resources Policy: Restriction on Planting Exotic Invasive Plants
• Maryland Invasive Species Council - Invasive Species of Concern in Maryland
• National Park Service, Mid-Atlantic Exotic Plant Management Team Invasive Plant List
• Non-Native Invasive Plants of Arlington County, Virginia
• Non-Native Invasive Plants of the City of Alexandria, Virginia
• Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
• Ohio Invasive Species Council
• Pennsylvania Department of Conservation and Natural Resources Invasive Plants
• Plant Invaders of Mid-Atlantic Natural Areas
• Virginia Master Naturalists Priority Species List
• WeedUS - Database of Plants Invading Natural Areas in the United States
• West Virginia Native Plant Society, Flora West Virginia Project, and West Virginia Curatorial Database System, September 3, 1999

References