|Turk's cap lily|
|Lilium superbum in Great Smoky Mountains National Park, North Carolina|
L. 1753 not Thunb. 1784
Lilium superbum is a species of true lily native to the eastern and central regions of North America. Common names include Turk's cap lily, turban lily, swamp lily, lily royal, or American tiger lily. The native range of the species extends from southern New Hampshire, Massachusetts, and New York, west to Illinois, Missouri, and Arkansas, and south to Georgia, Alabama, Mississippi, and Florida. 
Lilium superbum grows from 3–7 feet (0.91–2.13 m) high with typically three to seven blooms, but exceptional specimens have been observed with up to 40 flowers on each stem. It is capable of growing in wet conditions. It is fairly variable in size, form, and color. The color is known to range from a deep yellow to orange to a reddish-orange "flame" coloring with reddish petal tips. The flowers have a green star at their center that can be used to distinguish L. superbum from the Asiatic "tigerlilies" that frequently escape from cultivation.
Cats are extremely sensitive to lily toxicity and ingestion is often fatal; households and gardens which are visited by cats are strongly advised against keeping this plant or placing dried flowers where a cat may brush against them and become dusted with pollen which they then consume while cleaning. Suspected cases require urgent veterinary attention. Rapid treatment with activated charcoal and/or induced vomiting can reduce the amount of toxin absorbed (this is time-sensitive so in some cases vets may advise doing it at home), and large amounts of fluid by IV can reduce damage to kidneys to increase the chances of survival.
- Kew World Checklist of Selected Plant Families
- United States Department of Agriculture plants profile
- Blanchan, Neltje (2005). Wild Flowers Worth Knowing. Project Gutenberg Literary Archive Foundation.
- Connecticut Botanical Society
- "Lilium superbum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 20 December 2014.
- Biota of North America Program 2014 county distribution map
- Synge, Patrick M. Collins Guide to Bulbs. (1961)
- Illinois Wildflowers
- Lady Bird Johnson Wild Flower Center, University of Texas
- Frequently Asked Questions No Lilies For Cats.
- Fitzgerald, KT (2010). "Lily toxicity in the cat". Top Companion Anim Med. 25: 213–7. doi:10.1053/j.tcam.2010.09.006. PMID 21147474.
- Turk's cap lily is pure delight The Guardian.
- The Valentine bouquet that killed my cats: Mother's Day warning on lethal lilies Daily Mail.
- Lily Poisoning in Cats. Pet MD.
- USDA Plants Profile for Lilium superbum (turk's-cap lily)
- Missouri Botanical Garden, Kemper Center for Home Gardening: Turkscap lily (Lilium superbum)
- Lady Bird Johnson Wildflower Center Native Plant Information Network−NPIN: Lilium superbum (Turk's-cap lily) — with horticultural info.
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