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\X^ o\ Pteridopkyta ^xA Spermatophyta growing without cultivation in northeastern 

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Rusby» Henry Hurd. An enumeration of the plants collected in Boliv^ia by Miguel 

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Srout, Abel Joel. A revision of the North American Isothedaceae and Brachyiheda. 

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Hazen, Tracy Elliot. The life history of Sphaerella lacustris ( Haentatococcus 

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Underwood, Lncien Marcus. A review of the genera of ferns proposed prior to 

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Fink, Bmce. Notes on lichen distribution in the upper Mississippi Valley. 

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Howe, Marshall Avery. The Hepaticae and Anfhocerotes of California. Pages 

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Lloyd, Francis Ernest. The comparative embryolog}- of the Rubiaceae, Part I. 

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Bvana, Alexander "William. The Lejeuneae of the United States and Canada. 

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Salmon, Ernest Stanley. A monograph of the Erysiphaceae. Pages 1-292, plates 

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Grrlffiths, David, The North American Sordariaceae. Pages I-134, plotes 1-19^ 

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Hazen, Tracy Elliot. The Uloikricaceae and Chaetopkoraceae of the United States. 

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Borlingham, Gertrude Simmons. A study of the Ladariae of the United States. 

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