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About the Author
Roger Tory Peterson, one of the world's greatest naturalists, received every major award for ornithology, natural science, and conservation as well as numerous honorary degrees, medals, and citations, including the Presidential Medal of Freedom. The Peterson Identification System has been called the greatest invention since binoculars. These editions include updated material by Michael O'Brien, Paul Lehman, Bill Thompson III, Michael DiGiorgio, Larry Rosche, and Jeffrey A. Gordon.
With more than 40 years of experience in the herbal field, Steven Foster is author, co-author, and photographer of seventeen books. He lives in Eureka Springs Arkansas, in the heart of the medicinal plant-rich Ozarks.
With more than six decades of experience as a botanist, and three decades in medical botany James A. Duke is the author of more than 20 books. He lives in Fulton, Maryland, surrounded by some 300 medicinal plants.
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BALSAM FIR Resin, leaves Abies balsamea (L.) Mill Pine Family
Spire-shaped tree; to 60 ft. Flattish needles, to 11?4 in. long, in flattened sprays; stalkless. Needles rounded at base, each with 2 white lines beneath. Cones 1–4 in. long, erect; purple to green, scales mostly twice as long as broad. Bark smooth, with numerous resin pockets. Where found: Moist woods. Canada, south through New England and along mountains to Va. and W. Va.; west through n. Ohio to ne. Iowa, Mich. Uses: Canada Balsam, an oleoresin, is collected by cutting bark blisters or pockets in wood, July–Aug. Used as an antiseptic, in creams and ointments for piles, and as a root-canal sealer. Diuretic (may irritate mucous membranes). American Indians applied resin as an analgesic for burns, sores, bruises, and wounds. Leaf tea used for colds, coughs, and asthma. The oleoresin is pale yellow to greenish yellow; transparent and pleasantly scented. Its primary commercial application has been as a sealing agent for mounted microscope slides. Warning: Resin may cause dermatitis in some individuals.
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