1. Taxonomic revision of the Chiliotrichum group sensu stricto (Compositae: Astereae)

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2. Field guide to native oak species of eastern North America

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4. Atlas of United States trees.

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5. Checklist of United States trees (native and naturalized)

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6. Root parasites of southern forests

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7. Alaska trees and shrubs

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8. The distribution of forest trees in California

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9. Natural hybrids among pond, loblolly and pitch pines : [with list of literature cited]

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10. Geographic distribution of the pines of the world

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