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 /
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| Format: | Book |
| Language: | English |
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Orleans, Mass. :
Pub. by the Compiler,
1938.
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| Physical Description: | 217 pages ; 20 cm. |
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| Bibliography: | "Authorities cited": pages 170-179. |