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The Ferns and Allied Plants of Pennsylvania
Language: en
Pages: 242
Authors: Thomas R. Lord
Categories: Nature
Type: BOOK - Published: 2006 - Publisher: Pinelands Press

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Three hundred million years ago, ferns dominated the earth's surface, forming extensive marshes and forests with heights of over twenty-five meters. Today, fern
The Plants of Pennsylvania
Language: en
Pages: 1086
Authors: Ann Fowler Rhoads
Categories: Nature
Type: BOOK - Published: 2000 - Publisher: University of Pennsylvania Press

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The definitive guide to Pennsylvania's plant life.
Ferns and Allied Plants
Language: en
Pages: 869
Authors: R.M. Tryon
Categories: Nature
Type: BOOK - Published: 2012-12-06 - Publisher: Springer Science & Business Media

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This systematic treatment of the ferns and allied plants provides a modern classification of the Pteridophyta based on an assess ment of the wealth of new data
The Plants of Pennsylvania
Language: en
Pages: 1056
Authors: Ann Fowler Rhoads
Categories: Nature
Type: BOOK - Published: 2007-09-05 - Publisher: University of Pennsylvania Press

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The second edition of The Plants of Pennsylvania is the authoritative guide to identifying the nearly 3,400 species of flowering plants, ferns, and gymnosperms
A Field Guide to Ferns
Language: en
Pages: 306
Authors: Boughton Cobb
Categories: Nature
Type: BOOK - Published: 1999-03 - Publisher: Houghton Mifflin Harcourt

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Identifies over five hundred species.