|Natural range in United States|
Ilex cassine is a holly native to the southeastern coast of North America, in the United States from Virginia to southeast Texas, in Mexico in Veracruz, and in the Caribbean on the Bahamas, Cuba, and Puerto Rico. It is commonly known as dahoon holly or cassena, the latter derived from the Timucua name for I. vomitoria.
It is a large shrub or small tree growing to 10–13 m tall. The leaves are evergreen, 6–15 cm long and 2–4 cm broad, glossy dark green, entire or with a few small spines near the apex of the leaf. The flowers are white, with a four-lobed corolla. The fruit is a red drupe, 5–6 mm in diameter, containing four seeds.
- Ilex cassine var. cassine (United States, Caribbean)
- Ilex cassine var. angustifolia Aiton. (United States)
- Ilex cassine var. mexicana (Turcz.) Loes. (Mexico)
Ilex cassine is grown in warmer climates as an ornamental plant for the attractive bright red berries set against the glossy green leaves. It is known to grow to 30 feet tall. Its original range was close to the coast, but the range has been extended by planting.
Ilex cassine leaves, like those of its sister species I. vomitoria, contain measurable amounts of the stimulants caffeine and theobromine. The leaves of both species may have been used in the Native American cassena (the Black drink), and there has been confusion in the literature as to which species was commonly used to brew the drink, but I. vomitoria provides more caffeine and was probably the usual ingredient in cassena. An analysis of the levels of methylxanthines in the leaves used in various stimulant drinks found that I. cassine leaves have about 20% (by dry weight) of the amount of caffeine found in I. vomitoria, 8% of that in Coffea arabica, and about 3% of the caffeine in Camellia sinensis Kunze. I. cassine has twice as much theobromine as I. vomitoria and 20% of the level in C. sinensis Kunze (C. arabica does not contain significant amounts of theobromine), but the stimulant effect of theobromine is just 10% of that of caffeine.
- Rhodes, L.; Maxted, N.; Stritch, L. (2018). "Ilex cassine". IUCN Red List of Threatened Species. 2018: e.T20678718A20695061. doi:10.2305/IUCN.UK.2018-1.RLTS.T20678718A20695061.en. Retrieved 19 November 2021.
- "Ilex cassine". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2011-09-20.
- Austin, Daniel F. (2004). Florida Ethnobotany. CRC Press. pp. 590–591. ISBN 978-0-8493-2332-4.
- Florida Department of Environmental Protection: Florida's Hollies Archived 2010-02-09 at the Wayback Machine
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN 0-333-47494-5.
- "Ilex cassine Fact Sheet". Archived from the original on 2008-05-06. Retrieved 2008-05-07.
- "Ilex × attenuata 'Fosteri'". Plant Finder. Missouri Botanical Garden. Retrieved 6 December 2020.
- Edwards, Adam L.; Bennett, Bradley C. (2005). "Diversity of Methylxanthine Content in Ilex cassine L. and Ilex vomitoria Ait.: Assessing Sources of the North American Stimulant Cassina". Economic Botany. 59 (3): 275–285. doi:10.1663/0013-0001(2005)059[0275:DOMCII]2.0.CO;2. JSTOR 4256992.
- Media related to Ilex cassine at Wikimedia Commons
- Data related to Ilex cassine at Wikispecies
- Trees, Shrubs, and Woody Vines of North Carolina: Dahoon (Ilex cassine)
- New International Encyclopedia. 1905. .