Lost Monarch is the name of a Coast Redwood (Sequoia sempervirens) tree in Northern California that is 26 feet (7.9 m) in diameter at breast height (with multiple stems included),  and 320 feet (98 m) in height. It is the world's fifth largest coast redwood in terms of wood volume (the Del Norte Titan was listed as the largest single-stem coast redwood tree, in part because the basal measurements of the Lost Monarch contain multiple stems)..
Discovery and location
Lost Monarch was discovered on May 11, 1998, by Stephen C. Sillett, and amateur naturalist Michael Taylor, and is located among other giant redwoods called "The Grove of Titans" in Jedediah Smith Redwoods State Park, although its exact location has not been revealed to the public out of concern that excessive human foot traffic may upset the ecosystem or lead to vandalism. The tree is estimated to contain 34,914 cubic feet (988.7 m3) of wood volume, and is surrounded by other coastal redwoods known as some of the largest of the species. Of the surrounding redwood trees, some have names from the discoverers, such as El Viejo del Norte, Screaming Titans, Eärendil and Elwing, Stalagmight, and others.
Lost Monarch supports and provides a habitat for epiphytes including Polypodium scouleri. One report from 2003 estimated that Lost Monarch held about 1,000 pounds (450 kg) of P. scouleri fern mat material.
- Van Pelt, Robert (2001) Forest Giants of the Pacific Coast, University of Washington Press, Seattle. ISBN 0-295-98140-7
- Wendell D. Flint (1 January 2002). To Find the Biggest Tree. Sequoia Natural History Association. ISBN 978-1-878441-09-6. Retrieved 2 July 2013.
- Earle,Christopher J., Sequoia sempervirens (D. Don) Endlicher 1847, Gymnosperm Database, 2013, accessed July 2, 2013
- Richard Preston (10 April 2007). The Wild Trees: A Story of Passion and Daring. Random House Publishing Group. ISBN 978-1-58836-603-0. Retrieved 2 July 2013.
- Vaden, Mario D., Some redwoods are secret, 2013, accessed July 2, 2013
- Humboldt State University Website with expandable diagrams.
- Williams, Cameron B. and Stephen C. Sillett, Epiphyte communities on redwood (Sequoia sempervirens) in northwestern California, The Bryologist, Volume 110, Number 3, pages 420-452. 2007, accessed July 2, 2012
- James and the Giant Redwoods - Part One BBC Radio 4 documentary, February 14, 2012, accessed July 2, 2013