William A. McNamara is an American horticulturist and expert in the field of plant conservation and the flora of Asia. He is President and Executive Director of Quarryhill Botanical Garden, a 25-acre wild woodland garden in Northern California's Sonoma Valley featuring wild-sourced plants from East Asia. In 2017, he and Quarryhill Botanical Garden celebrated their 30th Anniversary.
McNamara has been a field associate of the Botany Department at the California Academy of Sciences in San Francisco since 2000. McNamara shares his horticultural knowledge through frequent presentations throughout the country, and he has been on the Garden Club of America's speakers list for conservation and horticulture since 2010. He is considered a modern-day plant hunter. In the company of horticulturists from the Royal Botanic Gardens, Kew, Windsor Great Park, the Howick Arboretum, and others, McNamara has botanized extensively in the wilds of East Asia. For the past 31 years, each fall he has ventured into the mountains of China, Japan, India, Nepal, Vietnam and Myanmar in search of plants. McNamara and his colleagues are pursuing their mutual goals of research, conservation and stemming biodiversity loss.
W. A. McNamara. "The Risks of Collecting" Pacific Horticulture, Volume 60, Number 2, Summer 1999.
W. A. McNamara. "All in a Day’s Work" The American Gardener, Volume 79, Number 4, July/August 2000.
W. A. McNamara. "Three Conifers South of the Chang" Pacific Horticulture, Volume 62, Number 1, January/February/March 2001.
W. A. McNamara. "Making a Last Stand: Acer pentaphyllum" Pacific Horticulture, Volume 63, Number 2, April/May/June 2002.
W. A. McNamara. "Lilies of Quarryhill" Lilies and Related Plants, 2003-2004. Royal Horticultural Society. London.
W. A. McNamara. "Pennel’s bird’s-beak: Cordylanthus tenuis ssp. capillaries" Endangered Biodiversity Information Project., May 2004.
W. A. McNamara. "Emmenopterys henryi" Pacific Horticulture, Volume 66, Number 2, April/May/June 2005.
W. A. McNamara. "Schima" Pacific Horticulture, Volume 66, Number 3, July/August/ September 2005.
W. A. McNamara. "Conifer Heaven" Conifer Quarterly, Volume 25, Number 2, Spring 2008
W. A. McNamara, Mark S. Roh, Deric Picton, Kaipu Yin & Qian Wang. "Assessment of genetic variation in Acer pentaphyllum based on amplified fragment length polymorphisms" Journal of Horticultural Science & Biotechnology, 83, 2008.
W. A. McNamara. "Magnolia grandis: a first flowering" The Journal of the Magnolia Society International, Volume 44, Issue No. 86, Fall/Winter 2009.
W. A. McNamara. "Schima sinensis" Curtis’s Botanical Magazine, Volume 26, Part 3, November 2009.
Mark S. Roh, W. A. McNamara, Corey Barnes, Kaipu Yin, & Qian Wang, "Genetic Variations of Acer pentaphyllum Based on AFLP Analysis, Seed Germination, and Seed Morphology." Acta Horticulturae 885, Article # 885_42, pages 305-312, 2010.
W. A. McNamara. "Endangered: Magnolia wilsonii" The Journal of the Magnolia Society International, Volume 45, Issue No. 88, Fall/Winter 2010.
W. A. McNamara. "Acer pentaphyllum" Curtis’s Botanical Magazine, Volume 28, Part 2, July 2011.
W. A. McNamara. "Botanic Garden Profile: Quarryhill Botanical Garden" Sibbaldia: The Journal of Botanic Garden Horticulture. No. 11. 2013.
W. A. McNamara, Nicole Cavender, Murphy Westwood, Catherine Bechtoldt, Gerard Donnelly, Sara Oldfield, Martin F Gardner, David Rae. "Strengthening the Conservation Value of ex situ Tree Collections" Oryx. Volume 49, Number 3, July 2015.
W. A. McNamara."Wild Roses in Asia And The Quarryhill Botanical Garden" The Indian Rose Annual XXXI. 2015.
W. A. McNamara. "llicium simonsii" Curtis's Botanical Magazine. Volume 33, Part 1, February 2016.
W. A. McNamara. "In Search of Wild Roses in Asia" 2016 American Rose Annual. November/December 2016.