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Weslandia
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Paul Fleischman
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Stay Out of the Basement
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R. L. Stine
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Cunningham's Encyclopedia of Magical Herbs
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Scott Cunningham
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Flora of Puerto Rico and Adjacent Islands
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Alain H. Liogier, Luis F. Martorell
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The Plants of Pennsylvania
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Ann Fowler Rhoads, Timothy A. Block
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The Jepson Manual
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James C. Hickman
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Biodiversity and Earth History
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Jens Boenigk, Sabina Wodniok, Edvard Glücksman
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The variation of animals and plants under domestication
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Charles Darwin
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An Illustrated Flora of the Northern United States, Canada and the British Possessions: Ophioglossaceae to polygonaceae
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Nathaniel Lord Britton, Addison Brown
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The Different Forms of Flowers on Plants of the Same Species
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Charles Darwin
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