Index to North American ferns.
Constituting a catalogue of the ferns and fern allies of North America north of Mexico, including all known forms, varieties, and hybrids.
Compiled and edited by Maurice Broun. With a foreword by charles A. Weatherby ...
|Main Author:||Broun, Maurice, 1906-1979.|
Orleans, Mass., Pub. by the Compiler, 1938.
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