Wild orchids of the Northeastern United States : a field and study guide to the orchids growing wild in New England, New York and adjacent Pennsylvania and New Jersey /
Brown, Paul Martin.
Brown, Paul Martin.Field and study guide to the orchids of New England and New York.
Ithaca ; London : Cornell University Press,
1997.
Previous ed.: published as A field and study guide to the orchids of New England and New York. Orchis Press, 1993
Ill. on inside covers
Bibliography: p207. - Includes index
Orchids