| tawny daylily |
USDA PLANTS Symbol: HEFU USDA ARS GRIN: 18861 ITIS: 42943 |
| Hemerocallis fulva (L.) L. | |
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Taxonomic Rank: Liliopsida: Liliales: Liliaceae |
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| Synonym(s): orange daylily, tawny daylily, common daylily | |
Orange daylily is a popular ornamental that has escaped to invade natural and disturbed areas throughout the United States. Plants are 2-4 ft. (0.6-1.2 m) tall with round stems. Leaves are grass-like, bright-green, 1-3 ft. (0.3-1 m) long and curve toward the ground. Flowers develop in the summer and are large, showy, and orange in color. Flowers occur in clusters of 5-9 at the apex of the stalk. Flowers in a cluster open one at a time and only for one day each. Flowers may have spots or stripes. Many cultivars of daylily now exist in a wide variety of sizes and flower colors. Orange daylily infestations often occur adjacent to plantings or at old homesites. Areas invaded include meadows, forests, floodplains, ditches, and forest edges. Once established, the thick tubers make control difficult. Orange daylily is native to Asia and was introduced into the United States in the late 19th century as an ornamental. |
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Identification, Biology, Control and Management Resources
- Plant Invaders of Mid-Atlantic Natural Areas - National Park Service and U.S. Fish and Wildlife Service
- Fact Sheet - Pennsylvania Dept. of Conservation and Natural Resources
| Selected Images from Invasive.org | View All Images at Invasive.org |
 Flower(s); Richard Old, XID Services, Inc., Bugwood.org Additional Resolutions & Image Usage |
 Feature(s); Stamens close-up Dan Tenaglia, Missouriplants.com, Bugwood.org Additional Resolutions & Image Usage |
 Flower(s); Dan Tenaglia, Missouriplants.com, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Britt Slattery, U.S. Fish and Wildlife Service, Bugwood.org Additional Resolutions & Image Usage |
 Flower(s); Richard Old, XID Services, Inc., Bugwood.org Additional Resolutions & Image Usage |
 Root(s); roots, tubers, and rhizomes Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org Additional Resolutions & Image Usage |
 Feature(s); base of plant John Cardina, The Ohio State University, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; Theodore Webster, USDA Agricultural Research Service, Bugwood.org Additional Resolutions & Image Usage |
Taxonomic References:
- USDA, NRCS. 2001. The PLANTS Database, Version 3.1, National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Invasive Listing Sources:
- City of Ann Arbor Michigan Parks and Recreation
- Delaware Natural Resources and Environmental Control, 2004
- Eric Ulaszek, U.S. Forest Service, Midewin National Tallgrass Prairie, Illinois
- Faith Campbell, 1998. Plants that Hog the Garden: Invasive Plants in the United States. Fine Gardening Online
- 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.
- 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.
- Maryland Department of Natural Resources, 1994
- Mid-Atlantic Exotic Pest Plant Council, 2005
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- Pennypack Ecological Restoration Trust, Pennsylvania.
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Georgia Exotic Pest Plant Council Category 3
- Kentucky Exotic Pest Plant Council Lesser Threat
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